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Journal articles on the topic 'Multipath interference'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Huang, Long, Zukun Lu, Zhibin Xiao, Chao Ren, Jie Song, and Baiyu Li. "Suppression of Jammer Multipath in GNSS Antenna Array Receiver." Remote Sensing 14, no. 2 (2022): 350. http://dx.doi.org/10.3390/rs14020350.

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Interference multipath is an important factor to affect the anti-jamming performance for the global navigation satellite system (GNSS) antenna array receiver. However, interference multipath must be considered in practical application. In this paper, the antenna array model for interference multipath is analyzed, and an equivalent model for interference multipath is proposed. According to the equivalent interference multipath model, the influence of interference multipath on anti-jamming performance is analyzed from the space only processing (SOP) and space-time adaptive processing (STAP). Int

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2

Erokhin A. A., Gafarov E. R., Alexandrin A. M., Ryazantsev R. O., Polenga S. V., and Salomatov. Yu. P. "Effect of the polarization of satellite navigation antennas on multipath error envelopes." Technical Physics Letters 48, no. 12 (2022): 66. http://dx.doi.org/10.21883/tpl.2022.12.54952.19249.

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The paper estimates the envelope of error introduced by the effect of multipath propagation in global navigation satellite systems. Based on the mathematical model of the radio path of the direct and reflected signals, the results of the multipath error envelopes for various types of navigation antennas are obtained. Keywords: antenna, GNSS, multipath interference, interference, radiation pattern, multipath error envelope.

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Du, Shijie, and Qiongqiong Jia. "Performance analysis of DME multipath interference monitoring for APNT applications." Journal of Physics: Conference Series 2849, no. 1 (2024): 012020. http://dx.doi.org/10.1088/1742-6596/2849/1/012020.

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Abstract In order to meet the application requirements of Performance Based Navigation (PBN) during the malfunction of the Global Navigation Satellite System (GNSS), the concept of Alternative Positioning Navigation and Timing (APNT) has been proposed. DME/DME navigation based on Distance Measuring Equipment (DME) is considered the most promising solution for APNT. However, the degradation of DME ranging accuracy due to multipath transmission makes the DME/DME navigation method unable to meet the performance requirements of PBN. Based on this, this paper analyzes the performance of Signal Qual

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Suppayasarn, Atikom, Sarun Duangsuwan, and Sathaporn Promwong. "Indoor Multipath Interference Cancellation Using MMSE-CMA Estimator with 2.45 GHz of MIMO Channel Measurement." Applied Mechanics and Materials 781 (August 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, and 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, no. 1 (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

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Du, Pengyu, Lujun Wang, Hongtao Zhang, and 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

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Sravanthi, P., and D. Venkata Ratnam. "Multipath Mitigation Technique Based on Successive Variational Mode Decomposition Using NAVIC Receiver Data." Applied Mechanics and Materials 926 (April 23, 2025): 113–23. https://doi.org/10.4028/p-nyuo1o.

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Multipath interference poses a significant challenge in satellite-based navigation systems, including NAVIC (Navigation with Indian Constellation), degrading the accuracy of position estimates. This study proposes a comprehensive approach to address multipath errors in NavIC receivers, combining multipath error calculation using the code minus carrier method with multipath reduction through mode decomposition techniques EMD- empirical mode decomposition, VMD-variational mode decomposition, and SVMD-successive variational mode decomposition. Data was collected from a NavIC receiver located at K

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8

Fridman, L. B. "Effectiveness of the Method of Adaptive Compensation of Active Interference in Conditions of Multipath Propagation." Ural Radio Engineering Journal 7, no. 1 (2023): 87–93. http://dx.doi.org/10.15826/urej.2023.7.1.006.

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The effectiveness of the method of adaptive compensation of active interference in the spectral domain in case of multipath propagation of interference, caused by re-reflections from local objects and underlying surface, is evaluated. The possibility of compensation of interference in the conditions of its multipath propagation both in the main and in the compensatory receiving paths is established.

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9

Alabi, Oluwaseun Yinka, and 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, no. 2 (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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10

Xie, Zhuang, Chongyi Fan, Jiahua Zhu, and Xiaotao Huang. "Doubly Covariance Matrix Reconstruction Based Blind Beamforming for Coherent Signals." Sensors 20, no. 12 (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 t

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11

Staniec, Kamil, and 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

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Xie, Tuo, Hanjun Jiang, Xijin Zhao, and Chun Zhang. "A Wi-Fi-Based Wireless Indoor Position Sensing System with Multipath Interference Mitigation." Sensors 19, no. 18 (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

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Maimour, Moufida. "Interference-aware multipath routing for WSNs: overview and performance evaluation." Applied Computing and Informatics 16, no. 1/2 (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 interf

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Li, Rong. "Digital Modulation Recognition in Different Environments." Advanced Materials Research 1049-1050 (October 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 si

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15

Pham, Anh Ngoc, Thoriq Ibrahim, Keita Yasutomi, Shoji Kawahito, Hajime Nagahara, and Keiichiro Kagawa. "Depth Quality Improvement with a 607 MHz Time-Compressive Computational Pseudo-dToF CMOS Image Sensor." Sensors 23, no. 23 (2023): 9332. http://dx.doi.org/10.3390/s23239332.

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In this paper, we present a prototype pseudo-direct time-of-flight (ToF) CMOS image sensor, achieving high distance accuracy, precision, and robustness to multipath interference. An indirect ToF (iToF)-based image sensor, which enables high spatial resolution, is used to acquire temporal compressed signals in the charge domain. Whole received light waveforms, like those acquired with conventional direct ToF (dToF) image sensors, can be obtained after image reconstruction based on compressive sensing. Therefore, this method has the advantages of both dToF and iToF depth image sensors, such as h

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Maimour, Moufida. "Interference-aware metrics impact on the performance of incremental multipath routing in WSNs." Journal of High Speed Networks 26, no. 3 (2020): 225–40. http://dx.doi.org/10.3233/jhs-200640.

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Multipath routing has been considered in the literature to provide bandwidth aggregation for high data rate applications. Because of the phenomena of inter-path interference in wireless networks, the overall throughput is far from being the summation of the provided ones by the different paths individually. One promising solution to this problem is to make use of interference aware metrics to build multiple paths such that the inter-path interference is minimised. In this work, we are interested in assessing the impact of a set of interference aware metrics on the performance of incremental mu

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17

Zhou, Liu, Nie, Yang, Zhang, and Ma. "M-ary Cyclic Shift Keying Spread Spectrum Underwater Acoustic Communications Based on Virtual Time-Reversal Mirror." Sensors 19, no. 16 (2019): 3577. http://dx.doi.org/10.3390/s19163577.

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Underwater acoustic communications are challenging because channels are complex, and acoustic waves when propagating in the ocean are subjected to a variety of interferences, such as noise, reflections, scattering and so on. Spread spectrum technique thus has been widely used in underwater acoustic communications for its strong anti-interference ability and good confidentiality. Underwater acoustic channels are typical coherent multipath channels, in which the inter-symbol interference seriously affects the performance of underwater acoustic communications. Time-reversal mirror technique utili

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18

Meng, Ling Jing, Dong Li, and Hai Bo Liu. "Impact of Multipath Effect on Low-Altitude Elevation Measurement of Radar." Applied Mechanics and Materials 602-605 (August 2014): 1879–82. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.1879.

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The main impact of multipath effect on low-altitude radar measurement is elevated in this paper. The influence of multipath effect on monopulse radar measurement of elevation is analyzed. Examples suggest that the multipath error caused by the signals from pattern main lobe of radar antenna should be mainly considered in the actual project. According to the three elevation range of reflected signal entering the radar beam area, the multipath error model of elevation is established. The problem of anti-multipath interference for low-altitude target tracking with radar is solved by analyzing the

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19

She, Feng, Hsiao Hwa Chen, and Hongyang Li. "Joint Angular and Time Diversity of Multi-Antenna CDMA Systems in Wireless Fading Channels." International Journal of Wireless Networks and Broadband Technologies 1, no. 1 (2011): 1–14. http://dx.doi.org/10.4018/ijwnbt.2011010101.

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In this paper, a multi-antenna based receiver structure for direct sequence code division multiple access (DS/CDMA) system is proposed. The proposed scheme exploits the excellent time resolution of a CDMA RAKE receiver and uses an antenna array beamforming structure to resolve multipath returns in both angular and time domains. A much higher diversity gain than that based only on the time domain diversity can be achieved. This work suggests a new space-time diversity paradigm, namely angular-time diversity, which differs from traditional Alamouti-type space-time coded schemes. The impairments

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20

Khanore, Monica, and Srija Unnikrishnan. "INTERFERENCE CANCELLERS FOR SPREAD SPECTRUM MODULATION BASED MULTIPLE ACCESS SYSTEMS." ICTACT Journal on Communication Technology 12, no. 1 (2021): 2231–38. http://dx.doi.org/10.21917/ijct.2021.0344.

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Systems based on spread spectrum technique are inherently interference resistant. However, asynchronous transmission and multipath propagation causes manifestation of multiuser interference. Multiuser interference in a multiple access system limits the capacity of the system. Hence, it becomes imperative to mitigate the interference. This work presents the design and mathematical analysis of Hybrid Interference Cancellation (HIC) detector for direct-sequence code division multiple access (DS-CDMA). The detector is analysed for single path as well as multipath propagation over a Rayleigh fading

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DEGTYAREV, ANDREY N., ALEXANDER S. KOZHEMYAKIN, IGOR L. AFONIN, GENNADY V. SLEZKIN, and ALEXANDER L. POLYAKOV. "TWO-STAGE ALGORITHM FOR CONSISTENT SIGNALS FILTERING." H&ES Research 14, no. 3 (2022): 32–38. http://dx.doi.org/10.36724/2409-5419-2022-14-3-32-38.

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Introduction. Introduction. To combat inter-symbol interference resulting from multipath signal propagation, spreading of the signal frequency spectrum, channel equalizing, OFDM-multiplexing with orthogonal frequency division of channels is used. To reduce the influence of non-linear signal distortions, methods of pre-distortion, diversity reception, as well as special algorithms for digital processing of the demodulator output signal are used. The effect of additive noise is reduced by using a filter matched to the signal. Objective. It is advisable to develop a matched filtering algorithm th

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Hirata, Kakeru, Takefumi Hiraguri, Tomotaka Kimura, et al. "Study on Drone Handover Methods Suitable for Multipath Interference Due to Obstacles." Drones 8, no. 2 (2024): 32. http://dx.doi.org/10.3390/drones8020032.

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Networks constructed in the sky are known as non-terrestrial networks (NTNs). As an example of an NTN, relay transmission using drones as radio stations enables flexible network construction in the air by performing handovers with ground stations. However, the presence of structures or obstacles in the flight path causes multipath interference; consequently, the propagation environment fluctuates significantly based on the flight. In such a communication environment, it is difficult for a drone to select an optimal ground station for a handover. Moreover, unlike a terrestrial network, the prop

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Wang, Yu, Qingquan Liu, Zhenpeng Jiang, Di Zheng, and Ronghua Shi. "Research on network interference problems in intelligent manufacturing." Journal of Physics: Conference Series 2921, no. 1 (2024): 012015. https://doi.org/10.1088/1742-6596/2921/1/012015.

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Abstract As the smart manufacturing industry continues to grow, ensuring high-quality data transmission has become especially critical. In wireless communication networks, numerous sources of interference exist, especially significant in restricted space environments such as factories. These areas are subject to signal interference from same-frequency devices and interference from multipath propagation due to signal reflection in buildings. In order to guarantee the communication quality of smart manufacturing systems, reducing network interference in such spaces is a prerequisite; therefore,

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Voronkov, O., S. Nesterenko, and V. Kasyanov. "FEATURES OF EVALUATION OF ACCURACY OF GEODESIC GPS MEASUREMENTS." Municipal economy of cities 3, no. 170 (2022): 200–208. http://dx.doi.org/10.33042/2522-1809-2022-3-170-200-208.

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It is known that the results of satellite measurements, which are obtained by the differential method, are usually dependent values and are characterized by the presence of a physical correlation with a close linear relationship. A model of errors of differential measurements is constructed, in which in order to separate the influence of interference on the signal coming to the satellite receiver, two components are identified, one of which is caused by interference from the main sources of error, are tropospheric and ionospheric refraction of navigation signals. individual measurement, in par

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Men, Wei, Liang Zhang, Jing-wei Yin, Xiao Han, and Hong-yu Yin. "Blind beamforming-based strong interference suppression in underwater acoustic direct-sequence code-division multiple-access systems." Journal of the Acoustical Society of America 152, no. 4 (2022): 2128–39. http://dx.doi.org/10.1121/10.0014598.

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In an underwater acoustic direct-sequence code-division multiple-access (DS-CDMA) system, the performance of the conventional receiver is severely limited by the strong multiple-access interferences, which is due to the near-far effect. In this paper, a time-frequency-time with eigendecomposition-based blind beamformer (TFT-EBB) method is proposed for a distant user to suppress strong interference from a nearby user in DS-CDMA underwater acoustic communications. When the interference level is moderately higher than that of the desired signal, the TFT-EBB method can estimate the composite steer

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Uryvsky, Leonid, and Valeriia Solianikova. "EVALUATION OF THE MULTIPATH EFFECT ON THE QUALITY OF RADIO COMMUNICATION IN THE TECHNOLOGICAL RANGE IEEE 802.11xx." Information and Telecommunication Sciences, no. 2 (December 19, 2022): 21–25. http://dx.doi.org/10.20535/2411-2976.22022.21-25.

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Background. As a result of the rays’ reflection from buildings, from the surface of the Earth or from horizontal boundaries between different layers of the atmosphere, occur multipath effects that cause fast fading, which degrades the quality of service. Objective. The purpose of the paper is to determine the multipath effect on the signal-to-noise ratio in a wireless communication channel. Compare the results obtained for a communication channel at operating frequencies of the IEEE 802.11xx standard: 5 GHz and 2.4 GHz. Methods. The useful signal powers and the total interference p

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Yu, Xin. "Design and Optimization on Train-Ground Wireless Communication of Passenger Information System of Urban Rail Transit." Applied Mechanics and Materials 236-237 (November 2012): 964–69. http://dx.doi.org/10.4028/www.scientific.net/amm.236-237.964.

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This paper briefly introduces train-ground wireless communication technology of Urban Rail passenger information system. Analysis several kinds of external interference in train-ground wireless communication engineering application: Same frequency interference, multipath interference and other electromagnetic interference. Proposes the anti interference measures. Proposes design principle and deployment solution of wireless access points.

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Zhang, Ping Hua, Xiu Liang Huang, and Zhong Yue He. "Research of Anti-Multipath Interference Capability in Direct Sequence Spread Spectrum Communication System by Simulation." Advanced Materials Research 846-847 (November 2013): 592–95. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.592.

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The effects of multipath fading with time delay longer or shorter than one chip interval on DSSS system are mathematically and experimentally researched. Simulation results indicate that DSSS system can efficiently overcome multipath fading in multipath Rayleigh Fading channels. And the spreading gain is not the higher the better, it must be chosen reasonably.

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Jun, Joonhyeon, Jongsung Kang, Jaehyun Park, Wooyong Yang, and Minkyu Park. "Accurate Low-Angle Tracking Using Successive Interference Cancelation and Single-Tone Frequency Estimation." Journal of Electromagnetic Engineering and Science 24, no. 6 (2024): 601–10. https://doi.org/10.26866/jees.2024.6.r.266.

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This paper tackles the low-angle target tracking problem caused by surface-reflected multipaths through successive interference cancelation (SIC) and single-tone frequency (STF) estimation. The coherent specular multipath component in the received radar signal is canceled through SIC, after which the angle-of-arrival (AoA) of the direct path is accurately estimated by applying STF estimation to the interference-suppressed signal. To further improve estimation accuracy, we develop an iterative process where SIC and STF are sequentially repeated. Drawing on the AoA of the direct path estimated u

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Zhu, Yu Hao, and Chong Shen. "Performance Verification of MIMO Technology in WLAN System and Diversity Gain Issue." Applied Mechanics and Materials 716-717 (December 2014): 1425–29. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.1425.

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Wireless signal reflecting, scattering or refracting causes the generation of multipath effects. Multipath causes multiple copies of the same wireless signal, These copies to different path to reach the receiver. The signal generated by a copy of the same produce serious interference. MIMO (Multiple-Input Multiple-Output) technology can make the interference caused by the multipath significantly reduced. In this paper, in the context of indoor and outdoor, through TP-LINK-WR845N (MIMO 2*2, which have 2 launching antennas and 2 receiving antennas) to verify the superior performance of this tech

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Takahashi, Satoshi. "Performance evaluation of radio transmission in multipath propagation environments using characteristic function method." Electronics and Communications in Japan (Part I: Communications) 84, no. 9 (2001): 64–73. http://dx.doi.org/10.1002/ecja.1041.

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AbstractA method for evaluating digital radio transmission performance in multipath propagation is proposed, and two typical environments are evaluated. The multipath environments examined have radio waves with both longer and shorter arrival‐delay differentials than the symbol duration. The effects of radio waves on symbol detection are expressed by an amplitude distribution which is efficiently obtained using a characteristic function method. Results show that degradation was the source of the intersymbol interference in closed‐space environments, and an increase in the symbol rate degrades

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Cheng, Li, Yang Li, Lianying Zou, and Yong Qin. "DOA Estimation for Highly Correlated and Coherent Multipath Signals with Ultralow SNRs." International Journal of Antennas and Propagation 2019 (October 13, 2019): 1–10. http://dx.doi.org/10.1155/2019/2837315.

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In a typical multipath propagation environment, there exists a strong direct path signal accompanying with several weak multipath signals. Due to the strong direct path interference and other masking effects, the Direction-of-Arrival (DOA) of a weak multipath signal is hard to be estimated. In this paper, a novel method is proposed to estimate the DOA of multipath signals with ultralow signal-to-noise ratio (SNR). The main idea is to increase the SNR and signal-to-interference ratio (SIR) of the desired multipath signal in time-delay domain before DOA estimation processing. Firstly, the cross-

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Jiang, Yiyang, Cheng Guo, Jinfeng Wang, and Rongqiao Xu. "Multipath Effects Mitigation in Offshore Construction Platform GNSS-RTK Displacement Monitoring Using Parametric Temporal Convolution Network." Remote Sensing 17, no. 4 (2025): 601. https://doi.org/10.3390/rs17040601.

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The Global Navigation Satellite System (GNSS), renowned for its high precision and automation, has shone brightly in the deformation monitoring of offshore facilities and sea-crossing bridges. However, antennas placed in these locations are often subject to signal interference from various reflective surfaces, such as rivers and oceans, which significantly compromises observation accuracy and reliability. Synthesizing previous research, we first propose a method for multipath dataset construction, which involves GNSS observation linear combinations, detailed mapping of the near-field reflector

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Boivin, D., L. A. de Montmorillon, L. Provost, and P. Sillard. "Coherent Multipath Interference in Bend-Insensitive Fibers." IEEE Photonics Technology Letters 21, no. 24 (2009): 1891–93. http://dx.doi.org/10.1109/lpt.2009.2035095.

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Obšil, P., A. Lešundák, T. Pham, et al. "Multipath interference from large trapped ion chains." New Journal of Physics 21, no. 9 (2019): 093039. http://dx.doi.org/10.1088/1367-2630/ab4081.

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Woodward, S. L., and T. E. Darcie. "A method for reducing multipath interference noise." IEEE Photonics Technology Letters 6, no. 3 (1994): 450–52. http://dx.doi.org/10.1109/68.275515.

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Jia, Qiongqiong, Renbiao Wu, Wenyi Wang, Dan Lu, Lu Wang, and Jie Li. "Multipath interference mitigation in GNSS via WRELAX." GPS Solutions 21, no. 2 (2016): 487–98. http://dx.doi.org/10.1007/s10291-016-0538-9.

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Bai, Zhiquan, Fang Zhao, Changhui Wang, and Cheng-Xiang Wang. "Multiple access interference and multipath interference analysis of orthogonal complementary code-based ultra-wideband systems over multipath channels." International Journal of Communication Systems 27, no. 12 (2013): 4430–42. http://dx.doi.org/10.1002/dac.2623.

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Widi Adnyana, Komang Gede, Nyoman Pramaita, and I. Made Oka Widyantara. "UNJUK KERJA KODE ORTHOGONAL M-SEQUENCE DALAM SISTEM DIRECT SEQUENCE SPREAD SPECTRUM MELALUI KANAL MULTIPATH FA." Jurnal SPEKTRUM 9, no. 4 (2022): 1. http://dx.doi.org/10.24843/spektrum.2022.v09.i04.p1.

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Multipath and multi-user interference are the main challenges in wireless communication systems. This has become a driving force for the development of data transmission technology that is focused to overcome these problems, one of which is spread spectrum. Spread spectrum is applied to CDMA technology which has the limitations of MAI, so a spreading code is required with specifications that have a very low cross-correlation value as in the orthogonal m-sequence code. In this study, simulate the orthogonal m-sequence code with a length of 8 chips on a multipath fading channel using the Direct

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Visentin, Tristan, Jürgen Hasch, and Thomas Zwick. "Analysis of multipath and DOA detection using a fully polarimetric automotive radar." International Journal of Microwave and Wireless Technologies 10, no. 5-6 (2018): 570–77. http://dx.doi.org/10.1017/s1759078718000284.

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AbstractMultipath propagation occurs in many situations of radar measurements in complex environments. The unwanted effects range from interference over the radar channels, which causes amplitude fading and a corrupted direction of arrival (DOA) estimation, to the detection of ghost targets in an angle of arrival of the multipath direction. Due to the different number of reflections, polarimetric radars are capable to separate certain multipaths from direct paths if the target is known in advance. Furthermore, it is possible to separate objects with different polarimetric features in DOA that

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Zainul Halim, Muhamad, Nyoman Pramaita, and Pande Ketut Sudiarta. "SIMULASI KINERJA GOLD CODE PADA SISTEM KOMUNIKASI DIRECT SEQUENCE SPREAD SPECTRUM (DSSS) MELALUI KANAL MULTIPATH FADING." Jurnal SPEKTRUM 8, no. 2 (2021): 257. http://dx.doi.org/10.24843/spektrum.2021.v08.i02.p29.

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The communication channel cannot be separated from noise, interference and fading.To minimize mutual interference, you can use a scatter code. This research uses Gold Codewith a code length of 31. This simulation aims to determine the effect of the number of multipathcomponents on the Gold Code performance of multipath fading channels. This simulation usesdigital modulation, namely BPSK (Binary Phase Shift Keying). In the simulation of flat fadingchannel with 1 multipath component number, the results of the comparison of simulated BERwith theoretical BER are almost the same so that the simulat

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Khairunnisa Yasmine, Arzalia, Nyoman Pramaita, and N. M. A. E. D. Wirastuti. "DESAIN SIMULASI PERFORMANSI KODE ORTHOGONAL GOLD PADA KANAL MULTIPATH FADING." Jurnal SPEKTRUM 9, no. 4 (2022): 10. http://dx.doi.org/10.24843/spektrum.2022.v09.i04.p2.

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Improved wireless communication system generate the various advanced technologies, one of which is spread spectrum technique. This technique working by multiplying dots bits information which have a large period with spreading code that have a smaller periode, which makes bit periode will follow the code periode. In order to maximize performance of this technique, an efficient code is required to reduce the occurrence of interference. The purpose of this study was to see how the variation of multipath components affected the work of the orthogonal gold code. This study compares BER vs. Eb/No f

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Kostyria, O., V. Storozhenko, and V. Naumenko. "Compensation of Multipath Interference in a Separated Passive Time and Frequency Synchronization Systems." Metrology and instruments, no. 4 (September 7, 2019): 17–23. http://dx.doi.org/10.33955/2307-2180(4)2019.17-23.

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Multipath propagation of radio waves negatively affects to the performance of telecommunications and radio navigation systems [1, 3]. When performing time and frequency synchronization tasks of spatially separated standards, the multipath signal propagation aggravates the probability of a correct synchronization and introduces an error. The presence of a multipath signal reduces the signal-to-noise ratio in the received signal, which in turn causes an increase in the synchronization error. The mathematical models of multipath interference suppression in the time and in the frequency domain a

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Yoshizawa, Shingo. "Underwater Acoustic Localization Based on IR-GCC-PHAT in Reverberant Environments." International Journal of Circuits, Systems and Signal Processing 15 (March 12, 2021): 164–71. http://dx.doi.org/10.46300/9106.2021.15.18.

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This paper presents a method of underwater acoustic localization in reverberant environments. Time difference of arrival (TDOA) measurement algorithm is a key technology for estimating direction of arrival (DOA) of an underwater sound source. In strong multipath interference, the pseudo-peaks in a correlation function disturb the detection of a correct time position and lead to a large TDOA measurement error. The proposed algorithm computes a time difference by taking cross-correlation of two impulse responses and improves robustness to multipath interference. The comparison of TDOA algorithms

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Yuan, Yue, Feng Shen, and Dingjie Xu. "Multipath modeling and mitigation by using sparse estimation in global navigation satellite system-challenged urban vehicular environments." International Journal of Advanced Robotic Systems 17, no. 5 (2020): 172988142096869. http://dx.doi.org/10.1177/1729881420968696.

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Multipath interference has been one of the most difficult problems when using global navigation satellite system-based vehicular navigation in urban environments. In this article, we develop a multipath mitigation algorithm exploiting the sparse estimation theory that improves the absolute positioning accuracy in urban environments. The navigation observation model is established by considering the multipath bias as additive positioning errors, and the assumption for the proposed method is that global navigation satellite system signals contaminated due to multipath are the minority among the

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Bakkar, Mohammad. "Inner-symbol Interference (INSI) reduction in OFDM system using distinctive characteristics of the pilot symbols." Association of Arab Universities Journal of Engineering Sciences 27, no. 1 (2020): 122–29. http://dx.doi.org/10.33261/jaaru.2019.27.1.013.

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    This research presents a wireless communication system using Quadrature Amplitude Modulation (16QAM) depending on using of the Orthogonal Frequency Division Multiplexing (OFDM). OFDM transmission system can effectively reduce inter symbol interference (ISI) caused by multipath fading, especially in the case of broadband data transmission. There are two kind of interference; inter symbol interference (ITSI) and inner symbol interference (INSI). ITSI is the interference caused by the delayed waves with larger than OFDM symbol duration, in order to avoid ITSI effective

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Wang, Yiwei, and Zhigang Huang. "MEDLL On-Strobe Correlator: A Combined Anti-multipath Technique for GNSS Signal Tracking." Journal of Navigation 73, no. 3 (2019): 658–77. http://dx.doi.org/10.1017/s0373463319000870.

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To reduce the operational complexity of the multipath estimating delay lock loop (MEDLL) and improve its anti-multipath performance for strobe correlators, a combination anti-multipath scheme, namely, the MEDLL on-strobe correlation technique, is proposed for global navigation satellite system (GNSS) signal processing. Short-delay multipath rays are separated from the strobe correlation function by the MEDLL mechanism; the dot product between the estimation residue and the standard correlation function or the BOC-PRN correlation function is then computed to eliminate the potential tracking amb

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Yu, Xiao Lei, Yin Shan Yu, Yu Yu Ji, and Dong Hua Wang. "Communication Performance of RFID System and Anti-Interference in the Multipath Rayleigh Fading Channel." Applied Mechanics and Materials 239-240 (December 2012): 1022–26. http://dx.doi.org/10.4028/www.scientific.net/amm.239-240.1022.

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With the communication environment of RFID system developing from near field communication to long distance communication, Rayleigh fading with Doppler frequency shift emerges from multipath effect between the readers and electronic tags. A systemic study was focused on modeling and analysis of channel transmission for Type A tag signals in the multipath Rayleigh fading channel. Furthermore, the OFDM system was added to the RFID tag signals to improve the sensitivity of SNR in the Rayleigh fading channel. The SNR of tag signal is not sensitive in the multipath Rayleigh fading channel. However,

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Wei, Hong, and Zhiyong Li. "Intelligent Recommendation Method of Mobile Wireless Communication Information Based on Speech Recognition Technology Under Strong Multipath Interference." International Journal of Information Security and Privacy 16, no. 2 (2022): 1–18. http://dx.doi.org/10.4018/ijisp.308308.

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With the rapid development of the Internet, it is more and more difficult to get interested information from the mass of information. In order to alleviate the problem of data sparsity, this paper proposes an intelligent recommender of mobile wireless communication information based on speech recognition technology under strong multipath interference with the help of speech recognition technology. According to different types of mobile wireless communication information, the recommended path is selected, and the information is denoised to reduce the interference value of mobile wireless commun

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Rekkal, Kahina, Sara Rekkal, and Abdesselam Bassou. "Advanced hybrid algorithms for precise multipath channel estimation in next-generation wireless networks." International Journal of Electrical and Computer Engineering (IJECE) 14, no. 2 (2024): 1654. http://dx.doi.org/10.11591/ijece.v14i2.pp1654-1664.

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Multipath channels continue to present challenges in wireless communication for both 5G and 6G networks. A multipath channel is a phenomenon in wireless communications where signals traverse from the sender to the receiver along various paths. This end occurs due to the reflection, diffraction, and refraction of signals of various objects and structures in the environment. Such pathways can cause symbol interference in the transmitted signal, leading to communication issues. To this end, our paper proposes the integration of three algorithms: teaching-learning-based optimization (TLBO), partic

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