Gotowe bibliografie tematyczne / Multipath interference

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Gotowa bibliografia na temat „Multipath interference”

Autor: Grafiati
Data publikacji: 4 czerwca 2021
Data aktualizacji: 12 lutego 2022

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Artykuły w czasopismach na temat "Multipath interference"

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Suppayasarn, Atikom, Sarun Duangsuwan i Sathaporn Promwong. "Indoor Multipath Interference Cancellation Using MMSE-CMA Estimator with 2.45 GHz of MIMO Channel Measurement". Applied Mechanics and Materials 781 (sierpień 2015): 89–92. http://dx.doi.org/10.4028/www.scientific.net/amm.781.89.

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This paper studies an indoor multipath interference cancellation using the MMSE-CMA estimator for the unlicensed at 2.45 GHz of wireless communication systems. The proposed of the MMSE-CMA estimator can mitigate a superposition of the multipath interference at the receiver. As the result, the magnitudes of the channel characterization in the time domain are shown between the measured and estimated channel as a difference of number of iterations. Furthermore, we also confirm the multipath interference cancellation with the eye diagrams.
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Wang, Manyi, Zhonglei Wang, Xiongzhu Bu i Enjie Ding. "An adaptive weighting algorithm for accurate radio tomographic image in the environment with multipath and WiFi interference". International Journal of Distributed Sensor Networks 13, nr 1 (styczeń 2017): 155014771668382. http://dx.doi.org/10.1177/1550147716683826.

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Radio frequency device-free localization based on wireless sensor network has proved its feasibility in buildings. With this technique, a target can be located relying on the changes of received signal strengths caused by the moving object. However, the accuracy of many such systems deteriorates seriously in the environment with WiFi and the multipath interference. State-of-the-art methods do not efficiently solve the WiFi and multipath interference problems at the same time. In this article, we propose and evaluate an adaptive weighting radio tomography image algorithm to improve the accuracy of radio frequency device-free localization in the environment with multipath and different intensity of WiFi interference. Field experiments prove that our approach outperforms the state-of-the-art radio frequency device-free localization systems in the environment with multipath and WiFi interference.
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Du, Pengyu, Lujun Wang, Hongtao Zhang i Zhe Xie. "Performance analysis of direct-sequence spread-spectrum underwater acoustic communications based on at-sea data". MATEC Web of Conferences 283 (2019): 07006. http://dx.doi.org/10.1051/matecconf/201928307006.

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Direct sequence spread spectrum (DSSS) signal uses phase coherent signals where the information symbols are multiplied with a code sequence, commonly known as chips. The signals are processed at the receiver using the code sequence as a matched filter to extract the information symbols. Taking advantage of the spread processing gain derived from the matched filter, communications can be carried out at low signal levels, which is the preferred method for high quality underwater acoustic (UWA) communication and remote UWA communication. However, in practical applications, DSSS UWA communication will face lots of interferences including multipath interference, Doppler compression interference and phase fluctuation interference, which will seriously affect the performance of DSSS. This paper first analyzes the interferences that DSSS faces in practical applications based on multiple actual received data collected in different water areas. By calculating the gain of the matched filter loss, one can find that influence of phase fluctuation interference has the most serious impact on DSSS. Secondly, the corresponding receiver processing algorithms are given for these interferences, including the differential energy detector and Doppler estimation method. The performance of differential energy detector under the above interferences is analyzed, which shows that the differential energy detector is insensitive to slow phase fluctuation interference and multipath interference and the differential energy detector combined with Doppler compensation can work well based on moving at-sea data. Finally, the parameter design of DSSS system in practical application is discussed and parameter design of DSSS UWA communication system should comprehensively consider the Doppler compression interference and phase fluctuation interference.
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Alabi, Oluwaseun Yinka, i Michael Kolawole. "Mitigating the Effects of Intereference in a Multipath Prone Environment for a DVB-T Transmission". International Journal of Informatics and Communication Technology (IJ-ICT) 4, nr 2 (1.08.2015): 86. http://dx.doi.org/10.11591/ijict.v4i2.pp86-89.

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This paper develops a novel simulation method that seeks to mitigate the effects of interference in a multipath prone environment for a DVB-T transmission by using the AWGN and the Multipath Rayleigh Fading Channel. The channel parameters were optimized until desired result was obtained. The reception performance of the DVB-T system shows that interference though not totally eliminated, can be minimized while transmitting in a multipath prone environment.
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Xie, Zhuang, Chongyi Fan, Jiahua Zhu i Xiaotao Huang. "Doubly Covariance Matrix Reconstruction Based Blind Beamforming for Coherent Signals". Sensors 20, nr 12 (25.06.2020): 3595. http://dx.doi.org/10.3390/s20123595.

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This paper proposes a beamforming method in the presence of coherent multipath arrivals at the array. The proposed method avoids the prior knowledge or estimation of the directions of arrival (DOAs) of the direct path signal and the multipath signals. The interferences are divided into two groups based on their powers and the interference-plus-noise covariance matrix (INCM) is reconstructed through the doubly covariance matrix reconstruction concept. The composite steering vector (CSV) that accounts for the direct path signal and multipath signals is estimated as the principal eigenvector of the sample covariance matrix with interferences and noise removed. The optimal weight vector is finally computed using the INCM and the CSV. The proposed method involves no spatial smoothing and avoids reduction in the degree of freedom. Simulation results demonstrate the improved performance of the proposed method.
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Staniec, Kamil, i Michał Kowal. "LoRa Performance under Variable Interference and Heavy-Multipath Conditions". Wireless Communications and Mobile Computing 2018 (2018): 1–9. http://dx.doi.org/10.1155/2018/6931083.

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LoRa (or LoRaWAN) is by far the best known representative of narrowband communication systems designed for the Internet of Things. As a system dedicated specifically for long-range operations, it possesses a considerable processing gain for the energetic link budget improvement and a remarkable immunity to multipath and interference. The paper describes outcomes of measurement campaigns during which the LoRa performance was tested against these two factors, that is, a heavy-multipath propagation and a controlled, variable interference generated, respectively, in a reverberation chamber and an anechoic chamber. Results allow quantitative appraisal of the system behavior under these harsh conditions with respect to LoRa’s three major configurable parameters: the spreading factor, bandwidth, and code rate. They also allow dividing LoRa configurational space into three distinct sensitivity regions: in the white region it is immune to both interference and multipath propagation, in the light-grey region it is only immune to the multipath phenomenon but sensitive to interference, and in the dark grey region LoRa is vulnerable to both phenomena.
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Xie, Tuo, Hanjun Jiang, Xijin Zhao i Chun Zhang. "A Wi-Fi-Based Wireless Indoor Position Sensing System with Multipath Interference Mitigation". Sensors 19, nr 18 (14.09.2019): 3983. http://dx.doi.org/10.3390/s19183983.

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Wi-Fi-based indoor position sensing solutions have the advantages of easy integration in mobile phones and low cost by using existing Wi-Fi access points. The mainstream methods are commonly based on the received signal strength indicator (RSSI), which suffers from multipath interference in complicated indoor environments. Through the in-depth analysis of the multipath interference, an RSSI-assisted time difference of arrival (TDoA) method is proposed for Wi-Fi-based indoor position sensing in this work. The key idea is to compensate for the multipath interference in the received signals based on the coarse estimation using RSSI and TDoA calculation. A prototype system has been implemented to validate the proposed method. Experimental results have demonstrated the effectiveness of the proposed method, especially for handling the multipath interference with small propagation delay difference. Experimental results show that the indoor position sensing system can achieve a 90th percentile error of 0.3 m. The proposed method can also achieve moderate computational complexity and moderate real-time performance compared to other methods.
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Maimour, Moufida. "Interference-aware multipath routing for WSNs: overview and performance evaluation". Applied Computing and Informatics 16, nr 1/2 (15.03.2018): 59–80. http://dx.doi.org/10.1016/j.aci.2018.03.002.

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Multipath routing holds a great potential to provide sufficient bandwidth to a plethora of applications in wireless sensor networks. In this paper, we consider the problem of interference that can significantly affect the expected performances. We focus on the performance evaluation of the iterative paths discovery approach as opposed to the traditional concurrent multipath routing. Five different variants of multipath protocols are simulated and evaluated using different performance metrics. We mainly show that the iterative approach allows better performances when used jointly with an interference-aware metric or when an interference-zone marking strategy is employed. This latter appears to exhibit the best performances in terms of success ratio, achieved throughput, control messages overhead as well as energy consumption.
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Li, Rong. "Digital Modulation Recognition in Different Environments". Advanced Materials Research 1049-1050 (październik 2014): 2084–87. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.2084.

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For the using of multi-modulation, the precondition of receiving and demodulating signal is to determine the type of the modulation, so automatic recognition of modulation signal has significant influence on the analysis of the signals. In this paper, digital modulation recognition is studied respectively in different environment of White Gaussian Noise (WGN), stationary interference and multipath interference. The simulation results show that the recognition success rate is the highest in stationary interference environment and the lowest in multipath interference environment with the same signal to noise ratio (SNR).
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Obšil, P., A. Lešundák, T. Pham, G. Araneda, M. Čížek, O. Číp, R. Filip i L. Slodička. "Multipath interference from large trapped ion chains". New Journal of Physics 21, nr 9 (19.09.2019): 093039. http://dx.doi.org/10.1088/1367-2630/ab4081.

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Rozprawy doktorskie na temat "Multipath interference"

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Faragher, Ramsey Michael. "Effects of multipath interference on radio positioning systems". Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612008.

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Cheng, Cheng. "GNSS Multipath and Interference Mitigation Using Bayesian Methods". Thesis, Toulouse, ISAE, 2015. http://www.theses.fr/2015ESAE0011.

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Les récepteurs GNSS sont utilisés pour estimer la position et la vitesse d’un véhicule à partir de signauxtransmis par des satellites. L’estimation est habituellement réalisée en plusieurs étapes. Lesparamètres des signaux qui concernent le délai de propagation, la phase et la fréquence Dopplerde la porteuse, sont estimés et exploités pour estimer des mesures de pseudo-distances et de delta-distances.Ces mesures sont ensuite utilisées comme observation de la position et de la vitesse parl’algorithme de navigation qui délivre l’état du véhicule. En environnement GNSS dégradé les signauxémis par les satellites GPS peuvent subir des réflexions, des réfractions, et suivre ainsi deschemins multiples, communément connus sous le nom de multi-trajets. Ces signaux induisent desdéformations du signal à différents niveaux dans les récepteurs. En particulier il en résulte une distorsiondes fonctions de corrélation et des fonctions de discrimination, ce qui conduit à des erreursdans les estimées de pseudo-distances et de delta-distances et, en conséquence, à une erreur depositionnement. Bénéficiant d’un état de l’art des approches développées pour l’atténuation deseffets des interférences, de nouvelles techniques sont proposées dans cette thèse afin de réduirel’impact des MT sur les performances des récepteurs, et d’améliorer ainsi la précision de positionnementGPS
Global Navigation Satellite Systems (GNSS) receivers calculate the user position, velocity and timeby using the signals received from a set of navigation satellites. In constricted environments, suchas urban canyons or other intensive obstruction scenarios, the signal transmitted by the satelliteis subject to reflection or diffraction and can follow different paths, commonly known as multipath(MP) interferences, before arriving at the antenna of the GNSS receiver. The MP interferencesaffect the signal processing results at different stages in the receiver. For instance, MP signals modifythe correlation and discriminator functions and can introduce errors in pseudo-range (PR) andcarrier phase measurements, resulting finally in GNSS-based positioning errors. Therefore the MPinterference can be considered as a dominant error source in these complex situations. This thesisinvestigates MP mitigation techniques based on signal processing methods at different stages ofthe GNSS receiver. By analyzing and comparing the state-of-the-art MP mitigation approaches, innovativeMP mitigation techniques are proposed in order to reduce the impact of MP interferenceson the GNSS receiver, and to improve the positioning accuracy based on GNSS
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Rice, Michael, i Qiang Lei. "SHF MULTIPATH CHANNEL MODELING RESULTS". International Foundation for Telemetering, 2005. http://hdl.handle.net/10150/604799.

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ITC/USA 2005 Conference Proceedings / The Forty-First Annual International Telemetering Conference and Technical Exhibition / October 24-27, 2005 / Riviera Hotel & Convention Center, Las Vegas, Nevada
This paper presents the results of land-based SHF channel modeling experiments. Channel modeling data were collected at Edwards AFB, California at S-Band, X-Band and Ku-band. Frequency domain analysis techniques were used to evaluate candidate channel models. A graphical user interface (GUI) was developed to search for the optimum channel parameters. The model parameters corresponding to different frequencies were compared for multipath events captured at approximately the same locations. A general trend was observed where the magnitude of the first multipath reflection decreased as frequency increased and the delay remained relatively unchanged.
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Seco, Granados Gonzalo. "Antenna arrays for multipath and interference mitigation in GNSS receivers". Doctoral thesis, Universitat Politècnica de Catalunya, 2000. http://hdl.handle.net/10803/6876.

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Esta tesis aborda la sincronización de una o varias réplicas de una señal conocida recibidas en un entorno con propagación multicamino e interferencias direccionales. Uno de los hilos conductores de este trabajo es la aplicación sistemática del principio de máxima verosimilitud (ML) junto con un modelo de señal en el cual las armas espaciales no tienen estructura, y en cual el ruido es Gaussiano y presenta una matriz de correlación desconocida. Esta última suposición es fundamental a la hora de obtener estimadores capaces de atenuar las señales interferentes que presentan algún tipo de estructura, y esto se consigue sin necesidad de recurrir a la estimación de ciertos parámetros de dichas señales. Por otra parte, la suposición de que las armas espaciales carecen de estructura tiene ventajas desde un punto de vista práctico, al mismo tiempo que simplifica la estimación del resto de parámetros ya que las estimaciones de estas firmas se pueden calcular de forma cerrada. Esto constituye un primer paso hacia la eliminación de las búsquedas en múltiples dimensiones, que es otro de los objetivos perseguidos en este trabajo.

En la primera parte de la tesis se deduce la solución de máxima verosimilitud para el problema general de estimación de retardos cuando el ruido tiene correlación espacial desconocida. Se demuestra que el criterio resultante para los retardos es consistente y asintóticamente eficiente, pero también es altamente no-lineal debido a la presencia del determinante de una matriz y no permite, por tanto, el uso de procedimientos sencillos de optimización. Asimismo, se demuestra y se argumenta intuitivamente que el criterio _ optimo ML se puede aproximar por una función de coste más sencilla que es asintóticamente equivalente. A diferencia de otros problemas de estimación, en el caso tratado aquí, el primer término del desarrollo de Taylor del estimador ML no conserva la eficiencia asintótica. La característica esencial de la nueva función de coste es que depende linealmente de la matriz de proyección sobre el subespacio de las señales y, por lo tanto, admite ser minimizada mediante el algoritmo IQML, que es eficiente desde el punto de vista computacional. Además, la existencia de métodos de inicialización sencillos y robustos a las interferencias, los cuales se basan en el uso de una matriz de pesos igual a la identidad y posiblemente también en el algoritmo ESPRIT, hace que el esquema de estimación propuesto pueda ser viable para un diseño práctico. La nueva función de coste se puede aplicar de la misma manera a la estimación del retardo en un canal FIR. En este caso, el algoritmo IQML se puede modificar de forma que, en cada iteración, la estimación del retardo se obtiene a partir de las raíces de un polinomio cuyo orden es igual a la longitud del canal.

El objetivo perseguido por los estimadores presentados en la segunda parte de la tesis es aprovechar una particularidad de los sistemas GNSS (Global Navigation Satellite Systems), que consiste en que la dirección de llegada de la señal directa puede ser conocida a priori. Basándose en esta información adicional y suponiendo que el array está calibrado, se propone un modelo simplificado, aunque al mismo tiempo aproximado, para la señal recibida. En este modelo todas las señales excepto la señal directa se engloban en un término con correlación espacial desconocida. Se analizan los estimadores ML del retardo y de la fase de portadora de la señal directa. El sesgo producido por las componentes multicamino al utilizar estos estimadores se reduce de forma muy importante con respecto al sesgo que sufren otros métodos. De hecho, el error cuadrático medio de los estimadores propuestos es en muchas ocasiones muy próximo o incluso inferior al mínimo error que se puede alcanzar con modelos más detallados del canal multicamino. Asimismo, se presentan dos algoritmos de estimación del retardo basados en el cálculo de las raíces de un polinomio. Se demuestra también que las estimaciones ML se pueden obtener a partir de la señal de salida de un conformador de haz híbrido. Debido a que el propio conformador depende de las estimaciones del retardo y de la amplitud de la señal directa, el uso de un algoritmo iterativo surge de forma natural. La formulación mediante el conformador híbrido proporciona una interpretación alternativa interesante de la estimación ML, y podrá ser apropiada para una realización práctica. Finalmente, se demuestra analíticamente y numéricamente que el estimador propuesto para el retardo es robusto frente a errores en el valor nominal del vector de enfoque de la señal directa, y se presenta una manera de extender el margen tolerable de errores de apuntamiento.

En la última parte de la tesis se trata la sincronización de un usuario deseado que transmite una secuencia de entrenamiento conocida en un sistema de comunicaciones DS-CDMA.
El modelo de señal utilizado agrupa el ruido, y la interferencia externa y de acceso múltiple en un término de ruido equivalente que presenta una matriz de correlación espacio-temporal desconocida. Partiendo de este modelo, se deduce un estimador del retardo que es una aproximación para un numero grande de muestras del estimador ML exacto y que es apropiado para canales con desvanecimientos lentos y noselectivos en frecuencia. El estimador propuesto es una técnica de un solo usuario y es resistente al efecto near-far. Su importancia radica en el hecho de que aprovecha la estructura de las señales en el dominio temporal y espacial, lo que contrasta con otros métodos existentes que, a pesar de utilizar un array de antenas, sólo utilizan la estructura de las señales en uno de los dos dominios. En un sistema de comunicaciones móviles, el usuario deseado está interferido por un número generalmente elevado de señales de otros usuarios y por posibles interferencias externas. En concordancia con este hecho, los resultados numéricos han mostrado que el uso conjunto de todos los grados de libertad espacio-temporales es indispensable para la correcta adquisición y seguimiento del retardo en sistemas con una carga elevada de usuarios y/o en presencia de interferencias externas.
The thesis deals with the synchronization of one or several replicas of a known signal received in a scenario with multipath propagation and directional interference. A connecting theme along this work is the systematic application of the maximum likelihood (ML) principle together with a signal model in which the spatial signatures are unstructured and the noise term is Gaussian with an unknown correlation matrix. This last assumption is key in obtaining estimators that are capable of mitigating the disturbing signals that exhibit certain structure. On the other hand, the assumption of unstructured spatial signatures is interesting from a practical standpoint and facilitates the estimation. The elimination of the multidimensional searches required by many estimators is one of the main objectives of the thesis.

In the first part of the thesis, the maximum likelihood solution to the general time delay estimation problem for the case of noise with unknown spatial correlation is derived. The resulting criterion for the delays is shown to be consistent and asymptotically efficient; but it is highly non-linear, and does not lead to simple optimization procedures. It is shown that the optimal ML criterion can be approximated by an asymptotically equivalent cost function. The cost function depends linearly on the projection matrix onto the subspace spanned by the signals, and hence it can be minimized using the IQML algorithm. The existence of simple initialization schemes based on identity weightings or ESPRIT makes the approach viable for practical implementation. The proposed cost function can be applied to the estimation of the delay in a FIR channel. In this case, each iteration of IQML comes down to rooting a polynomial.

The goal of the estimators presented in the second part of the thesis is to take advantage of one particularity of the GNSS (Global Navigation Satellite Systems) systems, such as GPS and GLONASS, consisting in that the direction-of-arrival of the line-of-sight signal may be known a priori. A simplified and approximate model for the received signal is proposed. The ML estimators of the time delay and carrier phase of the direct signal largely reduce the bias produced by multipath components. Their RMSE is in many situations very close to or even better than the best possible performance attainable with more detailed models of the multipath channel. It is also shown that the ML estimates can be obtained from the output signal of a hybrid beamformer.

In the last part of the thesis, the synchronization of a desired user transmitting a known training sequence in a DS-CDMA communication system is addressed. Multiple-access interference, external interference and noise are assumed to have unknown space-time correlation. A large-sample ML code-timing estimator that operates in frequency-nonselective, slowly fading channels is derived. It is a single-user and near-far resistant method. It is shown that the use of all spatial and temporal degrees of freedom is indispensable for the correct acquisition and tracking of the synchronization parameters in heavily loaded systems and/or in the presence of external interference.
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McMurdie, Andrew, i Eric Perrins. "iNET Preamble Detector Performance in the Presence of Multipath Interference". International Foundation for Telemetering, 2014. http://hdl.handle.net/10150/578172.

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ITC/USA 2014 Conference Proceedings / The Fiftieth Annual International Telemetering Conference and Technical Exhibition / October 20-23, 2014 / Town and Country Resort & Convention Center, San Diego, CA
The iNET preamble can be used to estimate the frequency offset and multipath channel in an aeronautical telemetry link. To accomplish this, the receiver must be able to identify the start of the preamble within the received data stream in the presence of uncompensated frequency offset and unknown multipath channel. In this paper, we explore the performance of seven candidate preamble detectors in the presence of a frequency offset and over multipath channels typically encountered in aeronautical telemetry. A non-coherent post-detection integration (NCPDI) detector considered in this paper demonstrates the best detection performance for a reduced complexity.
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Abdulrahman, Majeed Carleton University Dissertation Engineering Systems and Computer. "DFE for interference and multipath suppression in a CDMA system". Ottawa, 1993.

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Perrins, Erik. "ON THE PERFORMANCE OF MULTI-H CPM IN MULTIPATH INTERFERENCE". International Foundation for Telemetering, 2002. http://hdl.handle.net/10150/606378.

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International Telemetering Conference Proceedings / October 21, 2002 / Town & Country Hotel and Conference Center, San Diego, California
The performance of multi-h CPM over multipath interference channels is evaluated with computer simulations using the optimal coherent receiver and a suboptimal noncoherent receiver. For channels with high-amplitude short-delay multipath reflections, the simulations show that both receivers reach an error floor in their performance as the amplitude of the multipath reflections grows. The rate of degradation for the noncoherent receiver is worse than for the coherent receiver. For channels with low-amplitude long-delay reflections the coherent and noncoherent receivers had losses of 1 dB and 3 dB respectively relative to their respective unfaded performance.
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Davis, Adam Todd. "DYNAMIC BEHAVIOR OF MULTIPATH INTERFERENCE IN ARTM CHANNEL SOUNDING DATA". International Foundation for Telemetering, 2000. http://hdl.handle.net/10150/606500.

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International Telemetering Conference Proceedings / October 23-26, 2000 / Town & Country Hotel and Conference Center, San Diego, California
Data collected during July 1999 at Edwards EAFB by the Advanced Range Telemetry (ARTM) program is examined to characterize the dynamic behavior of multipath interference in an aeronautical telemetry channel. Multipath fade events are analyzed in the frequency domain to show how these fades appear, evolve, and disappear from the channel. A channel model and examples from the channel sounding data are used to show the dynamic nature of these fade events. The Doppler power spectrum is used to quantify the exact time-varying nature of the multipath fade events. The coherence time, or the amount of time the channel can be viewed as unchanging, is obtained from the Doppler power spectrum and is calculated to be 100 ms in the data sets examined in this paper. This implies that adaptive multipath mitigation techniques must have an adaptation bandwidth of 10 Hz.
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Rice, Michael, i Daniel H. Friend. "Antenna Gain Pattern Effects on Multipath Interference in Aeronautical Telemetering". International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/607555.

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International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada
This paper examines the effect of antenna gain pattern on multipath fades for a typical aeronautical telemetry system. Assuming a parabolic reflector antenna at the tracking station and a single specular reflection as the source of multipath, an expression for the fade depth which incorporates the attenuating effects of the antenna gain pattern is derived. A representative example is presented which demonstrates the utility of the expressions derived.
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Dye, Ricky G., i Lyman D. Horne. "PARAMETER CHARACTERIZATION ON A TELEMETRY CHANNEL INCLUDING THE EFFECTS OF THE SPECULAR RAY". International Foundation for Telemetering, 1995. http://hdl.handle.net/10150/608412.

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International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada
The aeronautical channel model is a good candidate for modeling the effects of multipath interference of telemetry signals on test ranges. The aeronautical fading channel model is parameterized by the signal to noise ratio, the Doppler shift and time delay between the specular and direct components, the specular to direct power ratio, the direct to diffuse power ratio, and the bandwidth of the multipath fading process. Segments of weighting signal data measured during a test at Tyndall AFB provide data which can be used to determine typical values of the above parameters in a variety of telemetering environments. In this paper, the set of parameters which most closely model the actual telemetry channel using the Tyndall data is determined.
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Książki na temat "Multipath interference"

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Multipath Phenomena in Cellular Networks. Artech House Publishers, 2002.

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Nee, Richard D. Van, i Technische Universiteit Delft. Multipath & Multi-Transmitter Interference in Spread-Spectrum Communication & Navigation Systems. Coronet Books, 1995.

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Części książek na temat "Multipath interference"

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Wu, Renbiao, Wenyi Wang, Dan Lu, Lu Wang i Qiongqiong Jia. "Multipath Interference Suppression". W Navigation: Science and Technology, 201–33. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-5571-3_5.

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Eargle, John M. "Multipath and Multimicrophone Interference Effects". W Electroacoustical Reference Data, 170–71. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2027-6_83.

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Gallager, R. G. "Residual Noise After Interference Cancellation on Fading Multipath Channels". W Communications, Computation, Control, and Signal Processing, 67–77. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4615-6281-8_3.

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Li, Dengao, Chong Han, Jumin Zhao, Xiaofang Zhao i Doudou Deng. "Research on Multipath Interference Suppression Algorithm Based on Blind Equalization". W China Satellite Navigation Conference (CSNC) 2017 Proceedings: Volume I, 889–98. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4588-2_75.

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He, Junxiao, Oliver Yang, Yifeng Zhou i Omneya Issa. "Multipath Routing Optimization with Interference Consideration in Wireless Ad hoc Network". W Ad Hoc Networks, 258–69. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-51204-4_21.

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Godbaz, John P., Adrian A. Dorrington i Michael J. Cree. "Understanding and Ameliorating Mixed Pixels and Multipath Interference in AMCW Lidar". W TOF Range-Imaging Cameras, 91–116. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-27523-4_5.

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Guoqiang, Yan, Duan Weijun, Ma Chao i Huang Liang. "Minimize Interference while Using Multipath Transportation in Wireless Multimedia Sensor Networks". W Recent Advances in Computer Science and Information Engineering, 239–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-25769-8_35.

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Wen, Yuanyuan, Lin Bai, Xi Zhang, She Shang, Dawei Song i Shuai Guo. "Algorithm for Multipath Interference Restraint Based on Blind Source Separation in Passive GNSS-Based Bistatic Radar". W Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 371–79. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67514-1_30.

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"Multipath Interference". W Microwave Mobile Communications. IEEE, 2009. http://dx.doi.org/10.1109/9780470545287.ch1.

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Acharya, Rajat. "Noise, multipath and interference". W Satellite Signal Propagation, Impairments and Mitigation, 247–78. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-809732-8.00008-9.

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Streszczenia konferencji na temat "Multipath interference"

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Cho, Kwangsik, i Yoonsik Kwak. "Multipath Interference Error Analysis on Obstacles Effect". W 2015 8th International Conference on Signal Processing, Image Processing and Pattern Recognition (SIP). IEEE, 2015. http://dx.doi.org/10.1109/sip.2015.18.

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Zhou, Hongyan, Lei Zhang, Shengya Long, Jing Li i Jie Luo. "Multipath Interference Phenomenon in Bend Insensitive Fiber". W Asia Communications and Photonics Conference. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/acpc.2013.af2c.1.

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Zhou, Hongyan, Lei Zhang, Shengya Long, Jing Li i Jie Luo. "Multipath Interference Phenomenon in Bend Insensitive Fiber". W Asia Communications and Photonics Conference. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/acpc.2013.af2d.23.

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Zhou, Hongyan, Lei Zhang, Shengya Long, Jing Li i Jie Luo. "Multipath Interference Phenomenon in Bend Insensitive Fiber". W Asia Communications and Photonics Conference. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/acp.2013.af2c.1.

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Zhou, Hongyan, Lei Zhang, Shengya Long, Jing Li i Jie Luo. "Multipath Interference Phenomenon in Bend Insensitive Fiber". W Asia Communications and Photonics Conference. Washington, D.C.: OSA, 2013. http://dx.doi.org/10.1364/acp.2013.af2d.23.

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Okada, Takahiro, i Kazuo Aida. "Multipath interference test method for distributed amplifiers". W Optomechatronic Technologies 2005, redaktor Yasuhiro Takaya. SPIE, 2005. http://dx.doi.org/10.1117/12.649736.

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Phu, Phillip, Herbert Aumann i Jean E. Piou. "Multipath height finding in the presence of interference". W 2007 IEEE Antennas and Propagation Society International Symposium. IEEE, 2007. http://dx.doi.org/10.1109/aps.2007.4395922.

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Hong, Xi, Ning Chang, Wenjie Wang i Qinye Yin. "Weak Interference Detection Improvement in GPS Multipath Environment". W 2018 14th IEEE International Conference on Signal Processing (ICSP). IEEE, 2018. http://dx.doi.org/10.1109/icsp.2018.8652412.

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Gariby, Moran, Tal Gariby i Ram Zamir. "Capacity of Impulsive Modulation over Multipath Interference Channels". W 2008 4th IEEE International Conference on Circuits and Systems for Communications (ICCSC 2008). IEEE, 2008. http://dx.doi.org/10.1109/iccsc.2008.47.

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Wang, Yasen, Qinglong Bao i Zengping Chen. "Efficient mainlobe interference suppression in coherent multipath environment". W 2016 Progress in Electromagnetic Research Symposium (PIERS). IEEE, 2016. http://dx.doi.org/10.1109/piers.2016.7735119.

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Raporty organizacyjne na temat "Multipath interference"

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McMurdie, Andrew, Michael Rice i Eric Perrins. iNET Preamble Detector Performance in the Presence of Multipath Interference. Fort Belvoir, VA: Defense Technical Information Center, czerwiec 2014. http://dx.doi.org/10.21236/ada611842.

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North, R. C., R. A. Axford i D. Bryan. The Effects of a Multipath Channel and Interference on Coherent M-PSK digital Communication Systems. Fort Belvoir, VA: Defense Technical Information Center, listopad 1993. http://dx.doi.org/10.21236/ada278158.

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Zhou, Q., i Y. Morton. Precise GPS Signal Tracking in Interference and Multipath Environment Using a Multi-Channel Software Receiver. Fort Belvoir, VA: Defense Technical Information Center, listopad 2010. http://dx.doi.org/10.21236/ada559186.

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