Dissertations / Theses: 'Equalisation'

1

Armour, Simon Martin Daniel. "Combined OFDM-equalisation." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369530.

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2

Yap, K. S. "Multicarrier equalisation and synchronisation systems." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269147.

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3

Thorlby, J. Paul. "Equalisation techniques for coded modulation." Thesis, University of York, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338549.

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4

Farahati, Nader. "New techniques for adaptive equalisation." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.302950.

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5

Kaya, Ismail. "A study of high performance equalisation and pre-equalisation for high speed wireless data communications." Thesis, University of Bristol, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322549.

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6

Hwegi, Yousef S. "Adaptive equalisation of time varying channels." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/27949.

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This thesis is concerned with solving the problem of equalisation of digital signals which have been passed through a time varying channel and corrupted by additive white noise. The approach used in this thesis to solve this problem is by the use of a robust filter structure rather than a tailored adaptation method. The reason for applying this approach is that, most adaptive algorithms such as the least mean square (LMS) and the recursive least squares (RLS) algorithms make the assumption that the input signals are statistically stationary. In the channel condition considered here, this assumption is violated and neither algorithm as a result works particularly well. Traditional attempts to overcome this problem have focused on modelling an assumed underlying dynamics of the channel distortion mechanism. The problem with these structures is that they are not robust in the case where the channel time variations do not match the assumed underlying dynamical model and the algorithms tend to be complex in nature. Consequently, two filter structures have been proposed in this thesis to tackle this problem. One structure known as the order statistic equaliser uses a combination of temporal and order statistic information of the received data sequence. The other structure, which has been named as the amplitude banded equaliser, uses a combination of temporal and amplitude information as opposed to the order statistics of the first structure. Both these structures have the advantage that they do not rely explicitly on the channel model. It has been concluded from the computer simulation studies conducted here that the tracking performance of the order statistic equaliser outperforms the linear equaliser structure when both are operating on the same time varying channel. The new amplitude banded structure, however, outperforms the order statistic equaliser in this situation.

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7

Altuna, Jon. "Cyclostationary blind equalisation in mobile communications." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/1375.

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Blind channel identification and equalisation are the processes by which a channel impulse response can be identified and proper equaliser filter coefficients can be obtained, without knowledge of the transmitted signal. Techniques that exploit cyclostationarity can reveal information about systems which are nonminimum phase; nonminimum phase channels cannot be identified using only second-order statistics (SOS), because these do not contain the necessary phase information. Cyclostationary blind equalisation methods exploit the fact that, sampling the received signal at a rate higher than the transmitted signal symbol rate, the received signal becomes cyclostationary. In general, cyclostationary blind equalisers can identify a channel with less data than higher-order statistics (HOS) methods, and unlike these, no constraint is imposed on the probability distribution function of the input signal. Nevertheless, cyclostationary methods suffer from some drawbacks, such as the fact that some channels are unidentifiable when they exhibit a number of zeros equally spaced around the unit circle. In this thesis the performance of a cyclostationary blind channel identification algorithm combined with a maximum-likelihood sequence estimation receiver is analysed. The simulations were conducted in the pan-European mobile communication system GSM environment and the performance of the blind technique was compared with conventional channel estimation methods using training. It is shown that although blind equalisation techniques can converge in a few hundred symbols in a time-invariant channel environment, the degradation with respect to methods with training is still considerable. Yet, the fact that a dedicated training sequence is not needed makes blind techniques attractive, because the data used for training purposes can be re-allocated as information data. In the concluding part of this thesis a new blind channel identification algorithm which combines methods that exploit cyclostationarity implicitly and explicitly is presented. It is shown that the properties of cyclostationary statistics are exploited in the new algorithm, and enhance the performance of the technique that solely exploits fractionally-spaced sampling. The algorithm is robust in the presence of correlated noise and interference from adjacent users.

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8

Georgiadis, Apostolos T. "Adaptive equalisation for impulsive noise environments." Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/429.

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This thesis addresses the problem of adaptive channel equalisation in environments where the interfering noise exhibits non–Gaussian behaviour due to impulsive phenomena. The family of alpha-stable distributions has proved to be a suitable and flexible tool for the modelling of signals with impulsive nature. However,non–Gaussian alpha–stable signals have infinite variance, and signal processing techniques based on second order moments are meaningless in such environments. In order to exploit the flexibility of the stable family and still take advantage of the existing signal processing tools, a novel framework for the integration of the stable model in a communications context is proposed, based on a finite dynamic range receiver. The performance of traditional signal processing algorithms designed under the Gaussian assumption may degrade seriously in impulsive environments. When this degradation cannot be tolerated, the traditional signal processing methods must be revisited and redesigned taking into account the non–Gaussian noise statistics. In this direction, the optimum feed–forward and decision feedback Bayesian symbol–by–symbol equalisers for stable noise environments are derived. Then, new analytical tools for the evaluation of systems in infinite variance environments are presented. For the centers estimation of the proposed Bayesian equaliser, a unified framework for a family of robust recursive linear estimation techniques is presented and the underlying relationships between them are identified. Furthermore, the direct clustering technique is studied and robust variants of the existing algorithms are proposed. A novel clustering algorithm is also derived based on robust location estimation. The problem of estimating the stable parameters has been addressed in the literature and a variety of algorithms can be found. Some of these algorithms are assessed in terms of efficiency, simplicity and performance and the most suitable is chosen for the equalisation problem. All the building components of an adaptive Bayesian equaliser are then put together and the performance of the equaliser is evaluated experimentally. The simulation results suggest that the proposed adaptive equaliser offers a significant performance benefit compared with a traditional equaliser, designed under the Gaussian assumption. The implementation of the proposed Bayesian equaliser is simple but the computational complexity can be unaffordable. However, this thesis proposes certain approximations which enable the computationally efficient implementation of the optimum equaliser with negligible loss in performance.

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9

Sweeney, Fergal Jon. "Optimisation for non-linear channel equalisation." Thesis, Queen's University Belfast, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314164.

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10

Brown, Colin. "Reduced complexity equalisation for fading channels." Thesis, University of York, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251806.

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11

Mohamad, Hafizal. "Subband adaptive equalisation for communications transceivers." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/259308/.

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12

Hsieh, Ming-Kuang (Leo). "A Battery Equalisation System for Electric Vehicle." Thesis, University of Canterbury. Electrical and Computer Engineering, 2007. http://hdl.handle.net/10092/1172.

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Abstract In 1999, the Electrical and Computer Engineering Department at the University of Canterbury started building their third electric vehicle (EV3) based on a TOYOTA MR2 with the goal of building a higher performance vehicle to match present combustion engined vehicles. The car is powered by 26 12volt sealed lead-acid batteries connected in series to achieve a nominal 312V DC source. A battery voltage equaliser is a device that draws energy from a higher charged battery, then discharges into a lower charged battery. The need for a voltage equaliser is principally due to the differences in cell chemistry, temperature gradients along the battery string and the ages of the batteries. During the charging or discharging process, some batteries reach their nominal voltage or reach deep discharge states before the others. Then if the charger keeps charging the batteries or the load keeps drawing energy from these batteries, it results in damage to the batteries. Therefore maintaining the charge level on each battery becomes important. In addition, it also improves the battery life and vehicle travelling range. This thesis details the analysis of three different types of battery equaliser, which are based on a 24W buck-boost converter, 192W buck-boost converter and 192W flyback converter. In this design, all converters are designed to work under current mode control with average of 2A. To make each converter install without significant effect on the performance and the cost, each converter is also built with the goals of being small, lightweight, cost effective, flexible for mounting, maintenance free and highly efficient. At the end, the prototype battery equalisation converters were designed, constructed and tested, and the efficiencies from each converter are measured around 90 ~ 92%. The experimental results show two banks of series connected batteries can be successfully equalised by the designed equaliser. This thesis covers the design, simulation and the construction procedures of this battery equaliser system, and also details on some considerations and possible future improvement that were found during the experimental test.

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13

Bradley, Martin James. "Adaptive equalisation for fading digital communication channels." Thesis, Durham University, 1996. http://etheses.dur.ac.uk/5177/.

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This thesis considers the design of new adaptive equalisers for fading digital communication channels. The role of equalisation is discussed in the context of the functions of a digital radio communication system and both conventional and more recent novel equaliser designs are described. The application of recurrent neural networks to the problem of equalisation is developed from a theoretical study of a single node structure to the design of multinode structures. These neural networks are shown to cancel intersymbol interference in a manner mimicking conventional techniques and simulations demonstrate their sensitivity to symbol estimation errors. In addition the error mechanisms of conventional maximum likelihood equalisers operating on rapidly time-varying channels are investigated and highlight the problems of channel estimation using delayed and often incorrect symbol estimates. The relative sensitivity of Bayesian equalisation techniques to errors in the channel estimate is studied and demonstrates that the structure's equalisation capability is also susceptible to such errors. Applications of multiple channel estimator methods are developed, leading to reduced complexity structures which trade performance for a smaller computational load. These novel structures are shown to provide an improvement over the conventional techniques, especially for rapidly time-varying channels, by reducing the time delay in the channel estimation process. Finally, the use of confidence measures of the equaliser's symbol estimates in order to improve channel estimation is studied and isolates the critical areas in the development of the technique — the production of reliable confidence measures by the equalisers and the statistics of symbol estimation error bursts.

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14

Power, Phillip David. "Non-linear multi-layer perceptron channel equalisation." Thesis, Queen's University Belfast, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343086.

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15

Rule, John Eric. "Gain and phase equalisation of power amplifiers." Thesis, University of Leeds, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400154.

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16

Wu, Jianjun. "Adaptive equalisation techniques for future mobile communications." Thesis, King's College London (University of London), 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338815.

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17

Perry, Russell. "Low complexity adaptive equalisation for wireless applications." Thesis, University of Bristol, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389138.

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18

Ta, Chi Hieu. "Precoding and equalisation for broadband MIMO systems." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501925.

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19

Gao, Jason. "Equalisation for carrierless amplitude and phase modulation." Thesis, Curtin University, 2002. http://hdl.handle.net/20.500.11937/233.

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Carrierless amplitude and phase (CAP) modulation is generally regarded as a bandwidth efficient two-dimensional (2-D) passband line code. It is closely related to the pulse amplitude modulation (PAM) and quadrature amplitude modulation (QAM) schemes. CAP has been proposed for various digital subscriber loop (DSL) systems over unshielded twisted pairs of copper wires. In this thesis, our main focus is on the minimum mean-square error (MMSE) performance of the ideal (i.e., infinite length) linear and non-linear (decision feedback) CAP receivers/equalisers in the presence of additive, coloured Gaussian noise, and/or data-like cross-talks. An in-depth analysis is given on the performance of both receiver structures. In the case of the linear receiver, one possible view of the overall CAP transceiver system which includes both data and cross-talk transmission paths is that it is a linear multiple-input multiple-output (MIMO) system. Accordingly, the existing MMSE results for a general MIMO system are applicable also to CAP systems. However, up to date, this approach was shown to be unsuccessful in the sense that the derived MMSE expressions are too complex and offer little insights. In our analysis, in order to find a more incisive MMSE expression, we reconsider the problem of minimisation of the MSEs at slicers. By exploiting the Hilbert transform pair relationship between the impulse responses of the inphase and quadrature transmit shaping filters, we are able to obtain an elegant and more meaningful MMSE expression, as well as the corresponding transfer functions of the optimum linear receive filters. In the case of the nonlinear, or decision feedback equaliser (DFE), receiver, we start our analysis with the receiver structure of a generic multidimensional (>/= 3) CAP-type system.This receiver consists of a bank of analog receive filters, the number of which equals the dimension of the CAP line code, and a matrix of cross-connected, infinite-length, baud-spaced feedback filters. It is shown that the optimum filters and the corresponding MMSE of the DFE receiver require the factorisation of a discrete-time channel spectral matrix. This mathematically intractable step can be avoided, however, when the DFE results are specialised to a standard 2-D CAP system where we are able to again exploit the Hilbert transform pair relationship to derive a further and more useful MMSE expression. Three sets of numerical studies are given on the MMSE performance of the CAP receivers. In the first set of studies. we model the sum of all crosstalks as an additive, Gaussian noise source and select three test transmission channels over which we compare the MMSE performance of the linear and DFE receiver structures. In the second set of studies, we compare the performance of the two receiver structures, but in a data-like cross-talk environment. The results demonstrate the importance of NEXT equalisation in the design of CAP receivers operating in a NEXT dominant environment. In the final set of studies which follows from the second set of studies, we investigate the relationship between the MMSE performance of the DFE receiver and system parameters which include excess bandwidth, data rate, CAP scheme. and relative phase between the received signal and the NEXT signal. The results show that data-like cross-talks can be effectively suppressed by using a large excess bandwidth (alpha > 1 in the case of a RC transmit shaping filter) alone.The relative phase also affect; the receiver performance. but to a lesser degree. In addition to the MMSE performance analysis. implementation issues of an adaptive linear CAP receiver are also considered. We propose a novel linear receiver by appending two fixed analog filters to the front-end of the existing adaptive linear receiver using fractionally-spaced equalisers (FSE). We show that if the analog filters are matched to the transmit shaping filters, then inphase and quadrature finite-length FSEs in the proposed receiver have the same NINISE solution. We further propose a modified least-mean-square (LMS) algorithm which takes advantage of this feature. The convergence analysis of the proposed LMS algorithm is also given. We show that the modified LMS algorithm converges approximately twice as fast as the standard LMS algorithm, given the same misadjustment, or alternatively, it halves the misadjustment, given the same initial convergence rate.

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20

Gao, Jason. "Equalisation for carrierless amplitude and phase modulation." Curtin University of Technology, Western Australian Telecommunications Research Institute (WATRI), 2002. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=14683.

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Carrierless amplitude and phase (CAP) modulation is generally regarded as a bandwidth efficient two-dimensional (2-D) passband line code. It is closely related to the pulse amplitude modulation (PAM) and quadrature amplitude modulation (QAM) schemes. CAP has been proposed for various digital subscriber loop (DSL) systems over unshielded twisted pairs of copper wires. In this thesis, our main focus is on the minimum mean-square error (MMSE) performance of the ideal (i.e., infinite length) linear and non-linear (decision feedback) CAP receivers/equalisers in the presence of additive, coloured Gaussian noise, and/or data-like cross-talks. An in-depth analysis is given on the performance of both receiver structures. In the case of the linear receiver, one possible view of the overall CAP transceiver system which includes both data and cross-talk transmission paths is that it is a linear multiple-input multiple-output (MIMO) system. Accordingly, the existing MMSE results for a general MIMO system are applicable also to CAP systems. However, up to date, this approach was shown to be unsuccessful in the sense that the derived MMSE expressions are too complex and offer little insights. In our analysis, in order to find a more incisive MMSE expression, we reconsider the problem of minimisation of the MSEs at slicers. By exploiting the Hilbert transform pair relationship between the impulse responses of the inphase and quadrature transmit shaping filters, we are able to obtain an elegant and more meaningful MMSE expression, as well as the corresponding transfer functions of the optimum linear receive filters. In the case of the nonlinear, or decision feedback equaliser (DFE), receiver, we start our analysis with the receiver structure of a generic multidimensional (>/= 3) CAP-type system.
This receiver consists of a bank of analog receive filters, the number of which equals the dimension of the CAP line code, and a matrix of cross-connected, infinite-length, baud-spaced feedback filters. It is shown that the optimum filters and the corresponding MMSE of the DFE receiver require the factorisation of a discrete-time channel spectral matrix. This mathematically intractable step can be avoided, however, when the DFE results are specialised to a standard 2-D CAP system where we are able to again exploit the Hilbert transform pair relationship to derive a further and more useful MMSE expression. Three sets of numerical studies are given on the MMSE performance of the CAP receivers. In the first set of studies. we model the sum of all crosstalks as an additive, Gaussian noise source and select three test transmission channels over which we compare the MMSE performance of the linear and DFE receiver structures. In the second set of studies, we compare the performance of the two receiver structures, but in a data-like cross-talk environment. The results demonstrate the importance of NEXT equalisation in the design of CAP receivers operating in a NEXT dominant environment. In the final set of studies which follows from the second set of studies, we investigate the relationship between the MMSE performance of the DFE receiver and system parameters which include excess bandwidth, data rate, CAP scheme. and relative phase between the received signal and the NEXT signal. The results show that data-like cross-talks can be effectively suppressed by using a large excess bandwidth (alpha > 1 in the case of a RC transmit shaping filter) alone.
The relative phase also affect; the receiver performance. but to a lesser degree. In addition to the MMSE performance analysis. implementation issues of an adaptive linear CAP receiver are also considered. We propose a novel linear receiver by appending two fixed analog filters to the front-end of the existing adaptive linear receiver using fractionally-spaced equalisers (FSE). We show that if the analog filters are matched to the transmit shaping filters, then inphase and quadrature finite-length FSEs in the proposed receiver have the same NINISE solution. We further propose a modified least-mean-square (LMS) algorithm which takes advantage of this feature. The convergence analysis of the proposed LMS algorithm is also given. We show that the modified LMS algorithm converges approximately twice as fast as the standard LMS algorithm, given the same misadjustment, or alternatively, it halves the misadjustment, given the same initial convergence rate.

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21

Hauptmeier, Sebastian. "Fiscal Competition and the Impact of Fiscal Equalisation." Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-96911.

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22

Lambert, Simon. "Voltage equalisation techniques for high capacitance device modules." Thesis, University of Newcastle Upon Tyne, 2013. http://hdl.handle.net/10443/1806.

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Traditionally, the electrochemical battery has been the prime medium by which electrical energy is stored for future use. Increasingly, the demands of modern systems such as electric vehicles, renewable energy, distributed generation, smart grid and others has stretched the development of new chemistries, materials and assembly techniques for electrochemical batteries. Additionally, some load profiles in these applications demand extremely high dynamic behaviour which is either undeliverable by conventional electrochemical batteries or is undesirably damaging to these technologies. As such, a family of electrochemical storage, known generally as supercapacitors or ultracapacitors, have been developed and implemented for such applications. In recent years advancements in electrochemical technology has led to hybridisation of high capacitance devices. Lithium-ion capacitors that are used in this work are, with their higher cell voltage and modern packaging, expected to be among the next emerging families of state-of-the-art electrical energy storage devices. The relatively low cell voltage of high capacitance cells requires them to be connected in series to attain a system level voltage. During charging and discharging, manufacturing tolerances between the cells results in voltage mismatch across the stack. Mismatched voltages are an inefficient use of the energy storage medium and can lead to dangerous failures in the cells. Several techniques exist to limit the variance in cell voltages of supercapacitors across a series connected stack. These range from simple systems which discharge the cells at higher voltages through resistors to more complex active converter systems which equalise the cell voltages through charge redistribution via a power electronic converter. Whilst the simpler schemes are effective they are very inefficient and as such are not suitable for use in many applications. A number of active converter voltage equalisation schemes have been proposed in literature, however, each of these equalisation schemes exhibit flaws which either makes them less desirable or less effective for a broad range of applications. Therefore, a new equalisation converter topology is proposed which is designed for greater equalisation effectiveness, modularity and size. The proposed equalisation converter differs from previously published equalisation schemes by allowing energy transfer between any pair of cells without the cumbersome multi-winding transformers employed in existing equalisation converters. The new equalisation scheme uses a bi-directional arrangement of MOSFET switches for galvanostatic isolation allowing the converter to be multiplexed to the stack. This arrangement allows the total size of the equalisation scheme to be reduced whilst maintaining performance.

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23

Holdsworth, Katharine Ormond. "Coding and equalisation for fixed-access wireless systems." Thesis, University of Canterbury. Electrical and Electronic Engineering, 2000. http://hdl.handle.net/10092/5453.

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This Thesis considers the design of block coded signalling formats employing spectrally efficient modulation schemes. They are intended for high-integrity, fixed-access, wireless systems on line-of-sight microwave radio channels. Multidimensional multilevel block coded modulations employing quadrature amplitude modulation are considered. An approximation to their error performance is described and compared to simulation results. This approximation is shown to be a very good estimate at moderate to high signal-to-noise ratio. The effect of parallel transitions is considered and the trade-off between distance and the error coefficient is explored. The advantages of soft- or hard-decision decoding of each component code is discussed. A simple approach to combined decoding and equalisation of multilevel block coded modulation is also developed. This approach is shown to have better performance than conventional independent equalisation and decoding. The proposed structure uses a simple iterative scheme to decode and equalise multilevel block coded modulations based on decision feedback. System performance is evaluated via computer simulation. It is shown that the combined decoding and equalisation scheme gives a performance gain of up to 1 dB at a bit error rate of 10-4 over conventional, concatenated equalisation and decoding.

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24

Mitchinson, Ben. "Iterative kernel techniques in application to channel equalisation." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269368.

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Wang, Jin. "Iterative source decoding, channel decoding and channel equalisation." Thesis, University of Southampton, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435723.

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26

Hadef, Mahmoud. "Adaptive equalisation for downlink UMTS terrestrial radio access." Thesis, University of Southampton, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438723.

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27

Tam, Pik Shan. "Constrained adaptive filtering and application to sound equalisation." Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398604.

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28

Young, Michael C. S. "Application of adaptive equalisation to microwave digital radio." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/11654.

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Shah, Purav. "Equalisation techniques for multi-level digital magnetic recording." Thesis, University of Plymouth, 2008. http://hdl.handle.net/10026.1/2617.

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A large amount of research has been put into areas of signal processing, medium design, head and servo-mechanism design and coding for conventional longitudinal as well as perpendicular magnetic recording. This work presents some further investigation in the signal processing and coding aspects of longitudinal and perpendicular digital magnetic recording. The work presented in this thesis is based upon numerical analysis using various simulation methods. The environment used for implementation of simulation models is C/C + + programming. Important results based upon bit error rate calculations have been documented in this thesis. This work presents the new designed Asymmetric Decoder (AD) which is modified to take into account the jitter noise and shows that it has better performance than classical BCJR decoders with the use of Error Correction Codes (ECC). In this work, a new method of designing Generalised Partial Response (GPR) target and its equaliser has been discussed and implemented which is based on maximising the ratio of the minimum squared euclidean distance of the PR target to the noise penalty introduced by the Partial Response (PR) filter. The results show that the new designed GPR targets have consistently better performance in comparison to various GPR targets previously published. Two methods of equalisation including the industry's standard PR, and a novel Soft-Feedback- Equalisation (SFE) have been discussed which are complimentary to each other. The work on SFE, which is a novelty of this work, was derived from the problem of Inter Symbol Interference (ISI) and noise colouration in PR equalisation. This work also shows that multi-level SFE with MAP/BCJR feedback based magnetic recording with ECC has similar performance when compared to high density binary PR based magnetic recording with ECC, thus documenting the benefits of multi-level magnetic recording. It has been shown that 4-level PR based magnetic recording with ECC at half the density of binary PR based magnetic recording has similar performance and higher packing density by a factor of 2. A novel technique of combining SFE and PR equalisation to achieve best ISI cancellation in a iterative fashion has been discussed. A consistent gain of 0.5 dB and more is achieved when this technique is investigated with application of Maximum Transition Run (MTR) codes. As the length of the PR target in PR equalisation increases, the gain achieved using this novel technique consistently increases and reaches up to 1.2 dB in case of EEPR4 target for a bit error rate of 10-5.

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30

Muthukkumarasamy, Vallipuram. "Data assisted equalisation for high speed digital transmission systems." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.334181.

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31

Skowratananont, K. "Adaptive algorithms for blind equalisation of fractionally spaced channels." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325352.

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Bendoukha, Samir. "Blind equalisation for space-time coding over ISI channels." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=14451.

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Al-Hanafy, Waleed Eid. "Non-linear precoding and equalisation for broadband MIMO channels." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=14440.

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Moosvi, Syed Mohsin Abbas. "Advances in superimposed training for channel estimation and equalisation." Thesis, University of Leeds, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444041.

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35

Yeap, Bee Leong. "Turbo equalisation algorithms for full and partial response modulation." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310853.

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36

Vlahoyiannatos, Spyros. "Blind equalisation schemes for dispersive stationary and mobile channels." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392551.

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37

Hart, Michael John. "Computationally efficient frequency domain equalisation for reconfigurable radio receivers." Thesis, University of Bristol, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.430152.

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Rothwell, Stuart G. "Multivariate statistical process control of batch processes." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285801.

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39

Irizar, JoseÌ MariÌa Zabalegui. "Combined equalisation and decoding for OFDM over wireless fading channels." Thesis, Staffordshire University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272580.

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Hoteit, Leila. "Polynomial techniques and robust extensions to unsupervised equalisation and identification." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324946.

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41

Liu, Rui. "Equalisation and signal detection techniques for wireless MC-CDMA systems." Thesis, University of Newcastle Upon Tyne, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420043.

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Bale, Viktor. "Computationally efficient equalisation of broadband multiple-input multiple-output systems." Thesis, University of Southampton, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437110.

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McLaughlin, Stephen. "Adaptive estimation and equalisation of the high frequency communications channel." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/15351.

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Abdulrazaq, Muhammad Bashir. "Reducing the complexity of equalisation and decoding of shingled writing." Thesis, University of Plymouth, 2017. http://hdl.handle.net/10026.1/9332.

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Shingled Magnetic Recording (SMR) technology is important in the immediate need for expansion of magnetic hard disk beyond the limit of current disk technology. SMR provides a solution with the least change from current technology among contending technologies. Robust easy to implement Digital Signal Processing (DSP) techniques are needed to achieve the potentials of SMR. Current DSP techniques proposed border on the usage of Two Dimensional Magnetic Recording (TDMR) techniques in equalisation and detection, coupled with iterative error correction codes such as Low Density Parity Check (LDPC). Currently, Maximum Likelihood (ML) algorithms are normally used in TDMR detection. The shortcomings of the ML detections used is the exponential complexities with respect to the number of bits. Because of that, reducing the complexity of the processes in SMR Media is very important in order to actualise the deployment of this technology to personal computers in the near future. This research investigated means of reducing the complexities of equalisation and detection techniques. Linear equalisers were found to be adequate for low density situations. Combining ML detector across-track with linear equaliser along-track was found to provide low complexity, better performing alternative as compared to use of linear equaliser across track with ML along track. This is achieved if density is relaxed along track and compressed more across track. A gain of up to 10dB was achieved. In a situation with high density in both dimensions, full two dimensional (2D) detectors provide better performance. Low complexity full 2D detector was formed by serially concatenating two ML detectors, one for each direction, instead of single 2D ML detector used in other literature. This reduces complexity with respect to side interference from exponential to linear. The use of a single bit parity as run length limited code at the same time error correction code is also presented with a small gain of about 1dB at BER of 10^-5 recorded for the situation of high density.

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Gomez, Jose Ismael Soto. "Optimisation techniques for combining code modulation with equalisation for fading channels." Thesis, Staffordshire University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336888.

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Orellana, Francisco Watkins. "Concatened codes combined with deinterleaving and adaptive equalisation for fading channel." Thesis, Staffordshire University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341000.

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Fagg, Jamie. "Neighbourhood deprivation and self-esteem : is there equalisation in early adolescence?" Thesis, Queen Mary, University of London, 2009. http://qmro.qmul.ac.uk/xmlui/handle/123456789/549.

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Background - Residents of more deprived and socially fragmented neighbourhoods are more likely to suffer from poor physical health and severe psychiatric morbidity than individuals living in more affluent and socially cohesive neighbourhoods. However, this pattern is less clear for more common psychological outcomes such as depression, anxiety and psychological traits such as self-esteem in early adolescence. In particular, the relationship between adolescent mental health and psychological traits may vary by national context. Two hypotheses broadly frame these variations: the deprivation amplification hypothesis and the socio-economic equalisation in youth hypothesis. Specifically, deprivation amplification is supported for adolescents in the U.S, while equalisation hypothesis appears to be supported outside that national context. Aims - The study aims to extend existing international research by addressing three research questions using data on adolescents aged 10-15 in the UK and Canada. 1. Is there support for socio-economic equalisation in early adolescent self-esteem in the UK and Canada across household socio-economic status and neighbourhood deprivation? 2. Is support for equalisation consistent across the socio-geographic levels of family, neighbourhood, region and nation? 3. Is there evidence for prospective associations between adolescent self-esteem and socio-geographic processes of neighbourhood context, composition, health selective migration and socio-geographic mobility in the UK and Canada? 6 Methods - Two longitudinal datasets, the British Youth Panel (UK) and the National Longitudinal Survey of Children and Youth (Canada) were analysed using multilevel logistic regression and cluster-adjusted multinomial logistic regression models. Results – Contrary to prevailing deprivation amplification hypothesis, self-esteem was not inversely associated with neighbourhood deprivation and social fragmentation neighbourhoods in both countries either prior to, or after controlling for individual and family characteristics. In fact, living in the least deprived 20% of Canadian neighbourhoods was associated with lower self-esteem in boys. Other than this, neighbourhood composition accounted for all significant associations with self-esteem. However, low teenage self-esteem was associated with subsequent household socio-geographic mobility, an effect explained by family factors. In addition, moving to more socially fragmented neighbourhoods is associated with low self-esteem but moving to more materially deprived neighbourhoods is not, independently of individual and family variables. Discussion and conclusions – Results are discussed with reference to the implications for deprivation amplification and socio-economic equalisation in youth hypotheses. Contributions to health geography and limitations of the study are then addressed before policy implications are considered.

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Sirisuk, Phaophak. "Transformation methods and partial prior information for blind system identification and equalisation." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326273.

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Wanchaleam, Pora. "Algorithms and structures for spatial and temporal equalisation in TDMA mobile communications." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322203.

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Yee, Mong Suan. "Radial basis function network based multilevel channel equalisation techniques for wireless communications." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326749.

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Dissertations / Theses on the topic 'Equalisation'

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