Dissertations / Theses: 'Trellis-coded modulation'

1

Arani, Faramarz Shayan. "Trellis coded modulation techniques." Thesis, University of Warwick, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387324.

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Tong, Jun. "Superposition coded modulation /." access full-text access abstract and table of contents, 2009. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?phd-ee-b23750455f.pdf.

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Thesis (Ph.D.)--City University of Hong Kong, 2009.
"Submitted to Department of Electronic Engineering in partial fulfillment of the requirements for the degree of Doctor of Philosophy." Includes bibliographical references (leaves [142]-152)

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3

Pyloudis, Konstantinos. "Low spectral efficiency trellis coded modulation systems." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Sep%5FPyloudis.pdf.

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Thesis (M.S. in Electrical Engineering and M.S. in Electrical Engineering)--Naval Postgraduate School, September 2006.
Thesis Advisor(s): Clark Robertson and Tri Ha. "September 2006." Includes bibliographical references (p. 79). Also available in print.

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Harada, Masaaki, Takaya Yamazato, Masaaki Katayama, and AKira Ogawa. "OFDM Systems with Multiple Trellis Coded Modulation." IEEE, 2000. http://hdl.handle.net/2237/7807.

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Ip, Shu-Fun (Alexis). "Trellis-coded modulation for voiceband data modems." Thesis, Loughborough University, 1988. https://dspace.lboro.ac.uk/2134/27238.

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The thesis is concerned with a combined convolutional coding and modulation technique, known as Trellis-Coded Modulation (TCM), with AM and QAM signals. TCM provides a useful error correction capability, without bandwidth expansion, by increasing appropriately the number of possible levels in a transmitted signal element. The development of the Correlative-Level Modulo Arithmetic (CLMA) coding technique has opened up a new approach to the understanding and implementation of TCM.

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Tan, Geok Leng. "Design issues in Trellis Coded Data Modulation." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358810.

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7

Carlisle, Chris J. "Trellis-coded modulation on time-dispersive channels." Thesis, University of Canterbury. Electrical and Electronic Engineering, 1990. http://hdl.handle.net/10092/5747.

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In this thesis we examine the performance of trellis-coded modulation (TCM) on time-dispersive channels. More specifically, we are interested in the performance improvements that TCM can offer in the presence of the residual intersymbol interference (ISI) that remains after non-ideal equalization on digital microwave radio (DMR) channels. The results are, however, applicable to other time-dispersive channels. The performance of TCM on additive white Gaussian noise (AWGN) channels is well understood, and tight analytical bounds exist on the probability of the Viterbi decoder making a decision error. When a channel is also time-dispersive, the performance of TCM systems has, in the past, been studied mainly by simulation, due to the difficulty of formulating tractable analytical bounds on the error probability. In the work reported here, both simulation and analytical techniques are used. The results of the simulation study show that TCM can improve the performance of a system with residual ISI. Although significant coding gains are achieved, the improvements in link outage are small, but useful. Simulation, however, is limited to symbol error probabilities greater than about 10-5 , and is not a particularly useful tool for estimating error probabilities over the range required for designing codes. There is a need for tight analytical bounds on error probability for TCM on time-dispersive channels so that the issues of designing good codes on such channels can be studied. Analytical upper bounds on error probability that rely on knowing the probability density function (pdf) of the ISI are derived. These bounds are closed-form expressions, but numerical techniques must be used to evaluate them. The emphasis in this work has been to obtain upper bounds that are tight for a wide range of time-dispersive channel conditions. A lower bound is also presented; this bound is tight for low levels of ISI, but loose for severe ISI. The pdf of the ISI must be computed to evaluate the analytical upper bounds. However, exact computation of the pdf is only tractable in a few special cases. Algorithms are presented for computing approximations to the ISI pdf for uncoded and trellis-coded systems with general one- and two-dimensional signal constellations. Procedures for forming worst and best case ISI pdf's that can be used to compute upper and lower bounds on symbol error probability are also developed. Examples show that the dependence between symbols, introduced into the transmitted signal by Ungerboeck codes, has negligible effect on the pdf of the ISI. In summary, the performance of TCM in a residual ISI environment has been studied using computer simulation. To overcome the limitations of simulation, analytical bounds on error probability have been developed. The numerical evaluation of these analytical bounds relies on algorithms to compute approximate ISI pdf's. The tightness of the bounds has been verified by computer simulation where possible.

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Stevens, Janet Emerson, and Tri T. Ha. "Trellis coded modulation applied to orthogonal signals." Thesis, Monterey, California. Naval Postgraduate School, 1993. http://hdl.handle.net/10945/24242.

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9

Hof, Axel. "On concatenated coding schemes employing trellis coded modulation." Düsseldorf VDI-Verl, 2009. http://d-nb.info/994364539/04.

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10

Wang, Mingjing. "Turbo implementation of high dimensional trellis-coded modulation." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1177521208.

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11

Zaidan, Mahdi Yahya. "Trellis coded modulation with σ-tree signal constellations." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/14984.

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12

Lo, Yung-Cheng. "Circular trellis-coded modulation in spread spectrum communications." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1175020785.

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13

Spenler, Stephen John. "Differentially coherent trellis coded modulation with subset dilation." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5963.

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14

Sun, Hua. "Layered turbo trellis-coded modulation for cooperative communications." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/392568/.

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In this thesis, we propose a suite of Turbo Trellis Coded Modulation (TTCM) aided transmission schemes designed for cooperative communications. Our objective is to combine Coded Modulation (CM) schemes with layered modulation arrangements in the context of cooperative communications for the sake of improving both the flexibility and power-efficiency of the entire system, while maintaining a moderate system complexity. Our investigations are focussed on the physical layer and on the network layer. Specifically, we firstly introduce and study the family of Trellis-Coded Modulation (TCM) and TTCM schemes. The encoder, decoder, as well as the structure of both CM schemes is investigated in detail. The BER performance of four popular CM schemes, namely of TCM, of TTCM, of Bit-Interleaved Coded Modulation (BICM) and of BICM with Iterative Decoding (BICM-ID)is investigated, when communicating over both Additive-White-Gaussian-Noise (AWGN) and uncorrelated Rayleigh fading channels. By analysing the performance of the four CM schemes, we show that the TTCM scheme performs better than the other three CM schemes not only for transmission over AWGN but also over uncorrelated Rayleigh fading channels. When employing the TTCM scheme in Decode-and-Forward (DAF) relaying assisted cooperative communications, the BER performance of the system is substantially improved. Then, we proposed two possible solutions for reducing the complexity of the TTCM scheme in the context of cooperative communications. The first one is based on Superposition Modulation (SPM) and the other relies on Hierarchical Modulation (HM). The transmitter may employ multiple low code-rate encoders, and the coded signal streams may be merged together by the SPM scheme to form a super-signal, so that they may be transmitted simultaneously without requiring extra transmit antennas. In this situation, the different signals exhibiting different error sensitivities may be mapped into specific SPM layers for transmissions. By contrast, a similar layered modulation scheme, namely HM may also be used, which is capable of reducing the complexity of the system. By employing the HM concept, the information in the different HM layers may be demodulated/decoded separately. Therefore, when the system is communicating based on the HM concept, it becomes quite flexible. When the relay node is capable of receiving all layers’ information in the HM signal, it may opt for forwarding either all of its received streams, or only the specifically required streams, instead of fully retransmitting all information received from the source. In this way, the processing burden imposed on the relay node may be reduced. Furthermore, the HM scheme may also be employed for improving the power-efficiency of the entire cooperative communication system. The original design objective of the HM scheme was that of providing Unequal Error Protection (UEP), while maintaining a high data rate. However, in cooperative communications, we may ‘re-purpose’ the HM scheme for reducing the power dissipation of all the nodes in the cooperative networks. Hence, our research was then focussed on finding the appropriate HM aided cooperative strategy, which is capable of reducing the power consumption of the entire system. As a further contribution, the Discrete-input Continuous-output-memoryless-Channel’s (DCMC) capacity was also quantified. We relied on the DCMC capacity metric to find a lower-bound for the performance of HM aided cooperative communication, when assuming that a ‘Perfect’ capacity-achieving channel code is used. Additionally, a hybrid cooperative communication system relying on TTCM, SPM, as well as HM has also been proposed and investigated. Finally, we employed our HM aided TTCM cooperative communication strategy in wireless ad hoc networks. A realistic system architecture and practical channels were considered, where the coded HM scheme was combined with an Opportunistic Routing (OR) algorithm for reducing the transmit power of each node in the cooperative network, as well as for the sake of reducing the average power consumption of the entire system. The results showed that if the system appropriately utilized the sophisticated modulation/demodulation capability of the layered modulation schemes, the flexibility of the OR algorithm may be improved, while the power consumption of the cooperative communication system may be reduced without increasing the outage probability.

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Lindebaum, Theo. "Design of a simulation for trellis coded modulation." Master's thesis, University of Cape Town, 1992. http://hdl.handle.net/11427/8354.

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Bibliography: leaves 116-7.
The last decade has shown a very rapid increase in the application of digital computers to virtually all walks of life. This has resulted in a demand for better and faster digital communication links, at reasonable prices. Trellis coded modulation is a fairly recent development in the technology of digital communications that has helped to meet an aspect of this demand. The Department of Electrical Engineering at the University of Cape Town had not undertaken any research in the field of trellis coded modulation at the time this thesis was started. From what was understood of the topic at the time, it was deemed important to develop a foundation of skills and tools for working with trellis coded modulation. It was hoped that such a foundation will give current and future members of the department sufficient background to spot potential applications for the principles of trellis coded modulation.

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Cui, Xiaoxiao. "MODIFIED VITERBI DECODING ALGORITHM FOR CIRCULAR TRELLIS-CODED MODULATION." Ohio University / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1171649965.

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Trichard, Marc Henri. "Study of Trellis Coded Modulation and error control coding." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/9658.

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In this thesis, we examine some general theoretical features of Trellis Coded Modulation. The codes in use are the recursive Ungerboeck convolutional codes and they are combined with Quadrature Amplitude Modulation over an Additive White Gaussian Noise channel. The search of optimum mappings is first treated and the question of having some smaller punctured constellations from a larger one is considered. Performance evaluation of TCM codes is provided according to geometric conditions that the mappings must stand in order to reduce the complexity of the calculation. Computation of transfer function is provided and this leads to a theoretical analysis for probability expressions of even, symbol and bit errors. A second order term expression is also elaborated which takes into consideration both error events on the trellis and errors on parallel transitions. Computer simulations have been run along with High Density Television transmission parameters. The results are presented and discussed. The use of error control coding techniques makes a great improvement in performance. For this purpose, Reed-Solomon codes have been concatenated with TCM codes, and gone through interleaving to ensure a higher error recovery efficiency.

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18

Rattray, George G. K. "Joint diversity trellis-coded modulation for frequency selective environments." Thesis, University of Sussex, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366060.

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Caldera, Manora K. "Combined coding and modulation in frequency-selective mobile communications." Thesis, Curtin University, 2000. http://hdl.handle.net/20.500.11937/2493.

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Due to constraints on spectrum availability and transmitter power, both bandwidth and power efficient communication techniques are desirable for mobile radio. Continuous phase modulated (CPM) signals have gained attention because of their attractive power spectra (Steele, 1992). It has been shown that the trellis coded modulation (TCM) schemes could provide better bit error rate performances compared to the uncoded schemes (Ungerboeck, 1982). Therefore, the combination of TCM which improves error probability and CPM signals which yield low spectral occupancy is expected to provide good coding and modulation over bandwidth and power limited channels such as the one encountered in mobile radio communications.In this research, a Trellis Coded Modulation (TCM) scheme, which combines convolutional coding and partial response Continuous Phase Modulation (CPM) such as Gaussian Minimum Shift Keying (GMSK), is investigated. Also, this study concentrates on the use of rate-half convolutional codes, and GMSK (B(subscript)0T=0.3). The latter has been adopted in the Global System for Mobile Communications (GSM) system.Appropriate codes are selected assuming Maximum Likelihood Sequence Detection (MLSD) based on the Viterbi algorithm using an extensive computer search. The bit-error-rate (BER) performances of the selected trellis coded GMSK schemes are theoretically evaluated in the presence of additive white Gaussian noise (AWGN) and frequency-flat fading. In the case of fading, the analysis is simplified to assume only amplitude-fading, and without considering the effect of fading on the phase of the received signal.Computer simulations are used to evaluate the BER performances of the proposed trellis coded GMSK schemes in the presence of AWGN and practical impairments, such as sample timing offset and carrier phase errors. Coding gains of up to 2.2dB at a BER of 10(subscript)-3 are obtained under ideal sample timing and carrier recovery conditions. This has been achieved without increasing the receiver complexity based on the number of states in the Viterbi decoder, compared to the uncoded GMSK scheme. Furthermore, these coded schemes are more tolerant to sample timing and carrier phase impairments.Also, the BER performances of the proposed trellis coded GMSK schemes have been extensively investigated by computer simulations for frequency-flat and frequency-selective fading channels. In the case of frequency-selective fading, the Viterbi decoding is made adaptive to cater for the channel impulse response variations with time. With this adaptive receiver, the irreducible BERs of the coded scheme is found to be lower than that of the uncoded. Performance improvements are obtained with a trellis coded GMSK scheme using a constraint length 2 code with a Viterbi decoder of 16 states compared to the 128 states required for the uncoded scheme. Further, the coded scheme has shown less sensitivity to carrier phase errors, compared to the uncoded.

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20

Huang, Zhiyong. "Modified Viterbi decoding algorithms for high dimensional trellis coded modulation." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1175094385.

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21

Kopp, Brian. "A Four-State Trellis-Coded 8-PSK Modulation Computer Simulation." International Foundation for Telemetering, 1988. http://hdl.handle.net/10150/615225.

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International Telemetering Conference Proceedings / October 17-20, 1988 / Riviera Hotel, Las Vegas, Nevada
The continuing growth of the telecommunications industry has created a steadily increasing need for higher performance communications systems - systems that can transfer data at faster rates while meeting stringent bit error rate requirements. In the case of satellite and mobile communications these same systems must also maintain minimum size and power consumption requirements. To help implement this industry demand computer simulations of communications systems can be a viable tool. Simulators can be used to demonstrate feasibility while maintaining minimum research and development costs during the design phase of these new and more complex communications systems. One type of system where simulation has proved helpful has been trellis-codedmodulation (TCM). This paper documents a simulation of a four-state trellis-coded eight- PSK modulation scheme currently being researched at New Mexico State University (NMSU). In the past simulations of convolutionally coded schemes have used binary symbols in the decoding process. In TCM the Euclidean space components of the modulation scheme are used in place of the binary symbols. The simulator under development incorporates these Euclidean signal components which are taken from an eight-PSK signal constellation. Soft-decision maximum likelihood decoding using trellis trace-back techniques are then applied to the Euclidean signal components to recover the simulated transmitted data. The simulator supplies the user with the number of undetected errors generated during a simulation as well as the bit error rate for a given signal to noise ratio. This simulator is intended to provide an environment for investigating improved communication system designs and it is hoped that the results that are obtained from such telecommunication simulators will help satisfy the ever increasing demands of the telecommunications industry. It should be noted that the research being conducted at NMSU on TCM is being directed by Dr. Frank Carden. The development of the simulator was conducted by the author to assist Dr. Carden in the continuing investigation of TCM.

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22

Alahmari, Abdallah Said. "Turbo coded pulse position modulation for optical communications." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/15388.

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23

Khalili, Fatemeh. "Design and Simulation of Coded-Modulation Using Turbo Trellis Coding and Multi-Layer Modulations." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1510064128952891.

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24

Tang, Yipeng. "DSP implementation of trellis coded modulation and distributed space time coding." Morgantown, W. Va. : [West Virginia University Libraries], 2001. http://etd.wvu.edu/templates/showETD.cfm?recnum=1796.

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Thesis (M.S.)--West Virginia University, 2001.
Title from document title page. Document formatted into pages; contains v, 118, [64] p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 114-118).

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25

Abdool-Rassool, Sheik Bilal. "Space-time trellis coded modulation for high speed wireless data transmission." Thesis, King's College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409319.

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26

Lin, Xu. "Trellis-coded permutation modulation for improved performance of narrowband noncoherent FSK." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11072008-063438/.

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27

Song, Xiangyu. "Systematic design of high dimensional circular trellis-coded modulation in spread spectrum communications." Ohio : Ohio University, 2001. http://www.ohiolink.edu/etd/view.cgi?ohiou1178911455.

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Caldera, Manora K. "Combined coding and modulation in frequency-selective mobile communications." Curtin University of Technology, School of Electrical and Computer Engineering, 2000. http://espace.library.curtin.edu.au:80/R/?func=dbin-jump-full&object_id=9820.

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Due to constraints on spectrum availability and transmitter power, both bandwidth and power efficient communication techniques are desirable for mobile radio. Continuous phase modulated (CPM) signals have gained attention because of their attractive power spectra (Steele, 1992). It has been shown that the trellis coded modulation (TCM) schemes could provide better bit error rate performances compared to the uncoded schemes (Ungerboeck, 1982). Therefore, the combination of TCM which improves error probability and CPM signals which yield low spectral occupancy is expected to provide good coding and modulation over bandwidth and power limited channels such as the one encountered in mobile radio communications.In this research, a Trellis Coded Modulation (TCM) scheme, which combines convolutional coding and partial response Continuous Phase Modulation (CPM) such as Gaussian Minimum Shift Keying (GMSK), is investigated. Also, this study concentrates on the use of rate-half convolutional codes, and GMSK (B(subscript)0T=0.3). The latter has been adopted in the Global System for Mobile Communications (GSM) system.Appropriate codes are selected assuming Maximum Likelihood Sequence Detection (MLSD) based on the Viterbi algorithm using an extensive computer search. The bit-error-rate (BER) performances of the selected trellis coded GMSK schemes are theoretically evaluated in the presence of additive white Gaussian noise (AWGN) and frequency-flat fading. In the case of fading, the analysis is simplified to assume only amplitude-fading, and without considering the effect of fading on the phase of the received signal.Computer simulations are used to evaluate the BER performances of the proposed trellis coded GMSK schemes in the presence of AWGN and practical impairments, such as sample timing offset and carrier phase errors. Coding gains of up to 2.2dB at a BER of 10(subscript)-3 ++
are obtained under ideal sample timing and carrier recovery conditions. This has been achieved without increasing the receiver complexity based on the number of states in the Viterbi decoder, compared to the uncoded GMSK scheme. Furthermore, these coded schemes are more tolerant to sample timing and carrier phase impairments.Also, the BER performances of the proposed trellis coded GMSK schemes have been extensively investigated by computer simulations for frequency-flat and frequency-selective fading channels. In the case of frequency-selective fading, the Viterbi decoding is made adaptive to cater for the channel impulse response variations with time. With this adaptive receiver, the irreducible BERs of the coded scheme is found to be lower than that of the uncoded. Performance improvements are obtained with a trellis coded GMSK scheme using a constraint length 2 code with a Viterbi decoder of 16 states compared to the 128 states required for the uncoded scheme. Further, the coded scheme has shown less sensitivity to carrier phase errors, compared to the uncoded.

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Yiin, Lihbor. "Sequence estimation receivers for trellis-coded continuous phase modulation on mobile channels." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/14818.

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Baldiwala, Aliasgar M. "Distance Distribution and Error Performance of Reduced Dimensional Circular Trellis Coded Modulation." Ohio University / OhioLINK, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1079387217.

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31

Benzakein, Allon. "Design and testing of a real time simulation for Trellis Coded Modulation." Master's thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/8467.

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Bibliography: leaves 75-76.
The aim of this project is to build and test a real time simulation for Trellis Coded Modulation(TCM). The tests to be performed are a comparison between Ungerboeck and pragmatic codes and varying and observing different Viterbi decoder parameters for coded 8PSK. TCM is coded modulation which means the choice of modulation scheme is linked with the encoding technique. Convolutional codes are important for an understanding of TCM. They are described by the rate (which is the number of inputs over the number of outputs) and the number of memory elements, v. For TCM schemes, soft decision decoding, based on euclidean distance, rather than hard decision decoding, based on hamming distance, is used. Ungerboeck developed a mapping of encoder bits to channel signals on a constellation diagram. The mapping is called mapping by set partitioning and aims to find the smallest free euclidean distance for a given code. The free euclidean distance is the minimum euclidean distance between output sequences in a code. The asymptotic coding gain is a measure of coding gain based on the free euclidean distance.

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CastinÌƒeira, Moreira Jorge. "Signal space coding over rings." Thesis, Lancaster University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322886.

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Alder, Frank A. "Symbol assignment and performance of simplex signaling in high dimensional trellis-coded modulation." Ohio : Ohio University, 1998. http://www.ohiolink.edu/etd/view.cgi?ohiou1177008035.

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Zhou, Biyun. "Non-binary cyclic codes and its applications in decoding of high dimensional trellis-coded modulation." Ohio : Ohio University, 2000. http://www.ohiolink.edu/etd/view.cgi?ohiou1173380815.

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Chinchilla, Rigoberto. "Interleaver design for the circular simplex turbo block coded modulator." Ohio : Ohio University, 2003. http://www.ohiolink.edu/etd/view.cgi?ohiou1178129287.

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Kotwal, Mithilesh N. "Encoding of trellises with strong tailbiting property." Ohio : Ohio University, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1113584078.

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Iyamabo, Philip Ehizogie. "Exact BER Calculation of TCM-MAPSK using Pairwise Probability of Product Trellis Algorithm for DVB Applications." University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481247472348161.

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Saboowala, Abbas Firoz. "Performance Analysis of Asymmetric Constellation in Concatenation with Trellis Coded Modulation for use in Intelligent Systems." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1302280058.

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Chen, Yiqi. "Computation of Initial State for Tail-Biting Trellis." Ohio University / OhioLINK, 2005. http://www.ohiolink.edu/etd/view.cgi?ohiou1125026574.

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Chen, Changlin. "The performance analysis and decoding of high dimensional trellis-coded modulation for spread spectrum communications." Ohio : Ohio University, 1997. http://www.ohiolink.edu/etd/view.cgi?ohiou1174616331.

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Lopez, Sanchez Francisco Javier. "Optimal design and application of trellis coded modulation techniques defined over the ring of integers." Thesis, Staffordshire University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262313.

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Mainali, Miraj. "Performance Evaluation of M-ary APSK using Punctured Trellis Coded Modulation (TCM) for DVB Applications." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1523281892780375.

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43

Rasmussen, Lars Kildehoj. "Trellis coded, adaptive rate hybrid-ARQ protocols over AWGN channels and slowly fading rician channels." Diss., Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/13434.

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Nguyen, Kim Chi. "Efficient simulation of space-time coded and turbo coded systems." Thesis, View thesis, 2007. http://handle.uws.edu.au:8081/1959.7/32467.

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The two main goals of this research are to study the implementation aspects of space-time turbo trellis codes (ST Turbo TC) and to develop efficient simulation methods for space-time and turbo coded systems using the importance sampling (IS) technique. The design of ST Turbo TC for improving the bandwidth efficiency and the reliability of wireless communication networks, which is based on the turbo structure, has been proposed in the literature. To achieve memory savings and reduce the decoding delay, this thesis proposes a simplified ST Turbo TC decoder using a sliding window (SW) technique. Different window sizes are employed and investigated. Through computer simulation, the optimum window sizes are determined for various system configurations. The effect of finite word length representation on the performance of ST Turbo TC is then studied. Simulation results show that ST Turbo TC is feasible for finite word length representation without significant degradation in the frame error rate performance. The optimum word length configurations are defined for all quantities external and internal to the ST Turbo TC decoder. For complex communication systems such as space-time codes and turbo codes, computer simulation is in fact the useful approach to obtain the estimated performance. To overcome the lengthy run-time requirements of the conventional Monte-Carlo (MC) method, this thesis introduces importance sampling simulation methods that accurately estimate the performances of turbo codes and space-time codes including orthogonal space-time block codes (OSTBC) and concatenated OSTBC. It is demonstrated that the proposed methods require much smaller sample sizes to achieve the same accuracy required by a conventional MC estimator.

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Paiement, Richard V. "The study of differential 8-PSK trellis-coded modulation in indoor wireless communications through computer simulation." Thesis, University of Ottawa (Canada), 1991. http://hdl.handle.net/10393/7641.

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This thesis work studies the use of 4- and 8-state trellis-coded modulation with phase-shift keying and non-coherent, differential signaling for digital indoor wireless communications, at an operating frequency of 1.5 GHz and a transmission rate of 10 Mbits/s. Many other modulation schemes have been considered for the indoor wireless channel in other studies, and trellis-coded modulation has been considered for the satellite and mobile channel. This study presents new BER performance results, obtained through computer simulations, that suggest a performance gain with TCM relative to DQPSK, for certain ranges of SNR and rms delay spread. Equalization is also considered, and it is shown that it can provide considerable performance gain.

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Nguyen, Kim Chi. "Efficient simulation of space-time coded and turbo coded systems." View thesis, 2007. http://handle.uws.edu.au:8081/1959.7/32467.

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Thesis (Ph.D.)--University of Western Sydney, 2007.
A thesis submitted to the University of Western Sydney, College of Health and Science, School of Engineering in fulfilment of the requirements for the degree of Doctor of Philosophy in Engineering. Includes bibliographical references.

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47

Carden, Frank, and Mike Ross. "A Spectrally Efficient Communication System: A 16-PSK Trellis Coded Modulation System Utilizing a Quantized Euclidean Decoder." International Foundation for Telemetering, 1989. http://hdl.handle.net/10150/614671.

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International Telemetering Conference Proceedings / October 30-November 02, 1989 / Town & Country Hotel & Convention Center, San Diego, California
Quantization of signal set vectors [1,2] could reduce the processing time required to apply the maximum likelihood decoding algorithm of Viterbi [3], to data encoded by a trellis coded modulation (TCM) scheme of the kind proposed by Ungerboeck [4]. Simulations have been performed to determine the effect of different degrees of circular quantization on TCM, using 8-PSK and 16-PSK signal sets, combined with a four state convolutional code. It was found that circular quantization produces good results when 2 or 3 quantization points are placed between signal set vectors.

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48

Quinteros, Milton I. "Trellis Coded Modulation Schemes Using A New Expanded 16-Dimensional Constant Envelope Quadrature-Quadrature Phase Shift Keying Constellation." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/924.

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In this thesis, the author presents and analyzes two 4-dimensional Constant Envelope Quadrature-Quadrature Phase Shift Keying constellations. Optimal demodulators for the two constellations are presented, and one of them was designed and implemented by the author. In addition, a novel expanded 16-dimensional CEQ2PSK constellation that doubles the number of points without decreasing the distance between points or increasing the peak energy is generated by concatenating the aforementioned constellations with a particular method and restrictions. This original 16-dimensional set of symbols is set-partitioned and used in a multidimensional Trellis-Coded Modulation scheme along with a convolutional encoder of rate 2/3. Effective gain of 2.67 dB over uncoded CEQ2PSK constellation with low complexity is achieved theoretically. A coding gain of 2.4 dB with 8 dB SNR is obtained by using Monte Carlo simulations. The TCM systems and demodulators were tested under an Additive White Gaussian Noise channel by using Matlab's Simulink block diagrams.

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49

Gray, Andrew, Meera Srinivasan, Marvin Simon, and Tsun-Yee Yan. "FLEXIBLE ALL-DIGITAL RECEIVER FOR BANDWIDTH EFFICIENT MODULATIONS." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/608745.

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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada
An all-digital high data rate parallel receiver architecture developed jointly by Goddard Space Flight Center and the Jet Propulsion Laboratory is pre- sented. This receiver utilizes only a small number of high speed components along with a majority of lower speed components operating in a parallel fre- quency domain structure implementable in CMOS, and can process over 600 Mbps with numerous varieties of QPSK modulation, including those incorpo- rating precise pulse shaping for bandwidth eÆcient modulation. Performance results for this receiver for bandwidth eÆcient QPSK modulation schemes such as square-root raised cosine pulse shaped QPSK and Feher’s patented QPSK are presented, demonstrating the great degree of exibility and high performance of the receiver architecture.

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Marques, Mario Rui Monteiro. "Performance analysis of an alternative to trellis coded modulation for waveforms transmitted over a channel with pulse-noise interference." Thesis, Monterey, Calif. : Naval Postgraduate School, 2008. http://bosun.nps.edu/uhtbin/hyperion-image.exe/08Jun%5FMarques.pdf.

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Thesis (M.S. in Electrical Engineering and M.S. in Electronic Warfare System Engineering)--Naval Postgraduate School, June 2008.
Thesis Advisor(s): Robertson, Clark. "June 2008." Description based on title screen as viewed on August 21, 2008. Includes bibliographical references (p. 39). Also available in print.

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Dissertations / Theses on the topic 'Trellis-coded modulation'

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