Performance Analysis of SVD-DSK-MIMO-OFDM System over Time Frequency Selective Fading Channels

International Journal of Electronics and Communication Engineering
© 2025 by SSRG - IJECE Journal
Volume 12 Issue 4
Year of Publication : 2025
Authors : Kasetty Lakshminarasimha, M. Srilatha, Majeti Venkata Sireesha, A Sravanthi Peddinti, R. Anil Kumar, Kapula Kalyani
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Kasetty Lakshminarasimha, M. Srilatha, Majeti Venkata Sireesha, A Sravanthi Peddinti, R. Anil Kumar, Kapula Kalyani, "Performance Analysis of SVD-DSK-MIMO-OFDM System over Time Frequency Selective Fading Channels," SSRG International Journal of Electronics and Communication Engineering, vol. 12,  no. 4, pp. 167-173, 2025. Crossref, https://doi.org/10.14445/23488549/IJECE-V12I4P116

Abstract:

The paper presents a unique approach to improving the dependability of OFDM-DSK systems for communication over doubly selective fading channels. The proposed solution uses Singular Value Decomposition (SVD) to divide the channel into distinct sub-channels, each with its own transmission characteristics, using available Channel State Information (CSI). It improves performance by multiplying the symbol matrix by the appropriate singular vectors at the transmitter. The Signal-to-Noise Ratio (SNR) of the received symbols can be increased using this configuration to allocate the reference chaotic sequence’s strongest sub-channel. It is linked to the highest singular value. Consequently, the system's Bit Error Rate (BER) is reduced, increasing its dependability. Here, strategically rearrange symbols according to their weights, which ideally distributes symbols to sub-channels according to their strengths. It helps to further reduce the BER. The singular-vector pre-coded OFDM-DSK (SVP-OFDM-DSK) combined with the Multiple-Input Multiple-Output (MIMO) and symbol reallocation technique. The system’s reliability is greatly increased by this approach, which helps to increase SNR in doubly selective fading channels. Compared to traditional techniques, simulation results are validated on MATLAB and SVP-OFDM-DSK yields reduced BER with and without symbol permutation.

Keywords:

Bit Error Rate, Channel state information, Multiple-input multiple-output, Signal-to-Noise Ratio, Singular value decomposition.

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