Results 31 to 40 of about 60,675 (219)
Физика волновых процессов и радиотехнические системы, 2022 This article presents the results of modeling a communication system with OFDM using the methods of scrambling the transmitted signals and masking the transmitted information.
Maxim Yu. Zuev
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Advanced Channel Estimation for MIMO-OFDM in Realistic Channel Conditions
, 2007 An advanced decision-directed channel estimation scheme is proposed, which is suitable for employment in a wide range of multi-antenna multi-carrier systems as well as for communications over the entire range of practical channel conditions.
Akhtman, J. +3 more
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Advances in Electrical and Computer Engineering, 2017 This article presents and evaluates pipelined architecture designs for an improved high-frequency Fast Fourier Transform (FFT) processor implemented on Field Programmable Gate Arrays (FPGA) for Multiple Input Multiple Output Orthogonal Frequency ...
DALI, M. +4 more
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A Low Complexity Optimal LMMSE Channel Estimator for OFDM System
Journal of Communications Software and Systems, 2021 Linear minimum mean square error (LMMSE) is the optimal channel estimator in the mean square error (MSE) perspective, however, it requires matrix inversion with cubic complexity.
Jyoti P. Patra +2 more
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IEEE Wireless Communications Letters, 2018 Orthogonal frequency division multiplexing (OFDM) with index modulation (IM) is a multicarrier transmission technique for frequency-selective fading channels. Although it is energy and spectral efficient, its performance may not be satisfactory as some active subcarriers can be suppressed by fading. In this letter, we consider trellis coded modulation (
Jinho Choi 0001, Youngwook Ko
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Synchronization technics for OFDM systems [PDF]
, 2006 [ENGLISH] The thesis deals with the problem of synchronization in Orthogonal Frequency Division Multiplexing (OFDM) systems. This modulation technique has been in existence since 1960, however, in the last years OFDM modulation is emerged as a key ...
Fusco, Tilde
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Wavelet-OFDM vs. OFDM: Performance comparison
2016 23rd International Conference on Telecommunications (ICT), 2016 Wavelet-OFDM based on the discrete wavelet transform, has received a considerable attention in the scientific community, because of certain promising characteristics. In this paper, we compare the performance of Wavelet-OFDM based on Meyer wavelet, and OFDM in terms of peak-to-average power ratio (PAPR), bit error rate (BER) for different channels and ...
Marwa Chafii +2 more
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Performance evaluation of channel estimation techniques for a mobile fourth generation wide area OFDM system [PDF]
, 2002 In this paper channel estimation techniques for a mobile fourth generation coherent orthogonal frequency division multiplexing (OFDM) system are proposed. Coherent detection dictates that a per-subband estimate of the frequency response of the channel is
Nix, AR +5 more
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Journal of Applied Informatics and ComputingThis study presents a simulation-based comparative analysis of Two-Ray Ground Reflection and COST-231 Hata propagation models on Bit Error Rate (BER) performance in point-to-point OFDM wireless systems.
Nurhadi Ramadhan, Endah Setyowati
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A way of decreasing the reliability of new OFDM data link
Dianzi Jishu Yingyong, 2021 A new OFDM data link model based on OCML is proposed to solve the problem of reliability of data link of air-to-ground radar. The above model uses OCML spatiotemporal chaotic sequence to improve CCSK soft spread spectrum, and simulates with coding and ...
Su Yuhang +3 more
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