BER Performance Simulation Analysis of Single-Carrier Frequency Domain Equalization Processing

In this document, we conduct a BER performance simulation analysis of single-carrier frequency domain equalization (SC-FDE) processing. Although the implementation code is relatively simple, we will thoroughly discuss each processing step and parameter configuration using a MATLAB-based simulation framework. The simulation employs QPSK modulation, incorporates additive white Gaussian noise (AWGN) channel conditions, and implements a minimum mean square error (MMSE) equalizer in the frequency domain. We will examine the algorithm's performance across various channel conditions, including different signal-to-noise ratio (SNR) values and multipath scenarios. The implementation involves key functions such as FFT/IFFT transformations for domain conversion, zero-padding for cyclic prefix insertion, and matrix operations for equalization weight calculation. Additionally, we will compare the performance differences between SC-FDE and alternative methods like OFDM, analyzing computational complexity and bit error rate characteristics. Finally, we will provide optimization suggestions including adaptive equalization algorithms and improved channel estimation techniques to enhance the method's performance and reliability. This document aims to provide comprehensive insights into SC-FDE processing through practical simulation examples and performance metrics.