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- Title
Walsh transform-based non-linear equalization algorithm for enhancing the efficiency of MIMO-OFDM communication system.
- Authors
Ramadan Mohamed, Khaled
- Abstract
The Orthogonal Frequency Division Multiplexing (OFDM) method provides effective bandwidth utilization and straightforward Frequency Domain Equalization (FDE). The OFDM system can be applied without a group of modulators and demodulators by using the Inverse Fast Fourier Transform (IFFT) and Fast Fourier Transform (FFT). The Fast Walsh Hadamard Transform (FWHT) and Inverse Fast Walsh Hadamard Transform (IFWHT) can also be used to build the OFDM system. In this work, we employ the IFWHT and FWHT to build the OFDM. This is followed by a proposal for a Joint Low-Complexity Regularized Zero Forcing-Successive Interference Cancellation (JLCRZF-SIC) equalizer with respect to various linear and nonlinear equalizers at various antenna configurations. A closed form for arithmetic operation count for the proposed equalizer is proposed. The proposed equalizer executes the equalization process more accurately than other schemes with low-complexity deployments. The analysis results show that the proposed equalizer outperforms the conventional one.
- Subjects
ORTHOGONAL frequency division multiplexing; TELECOMMUNICATION systems; HADAMARD matrices; FAST Fourier transforms; ALGORITHMS; MOBILE communication systems; INTERSYMBOL interference
- Publication
Wireless Networks (10220038), 2024, Vol 30, Issue 1, p363
- ISSN
1022-0038
- Publication type
Article
- DOI
10.1007/s11276-023-03440-3