Research on Single Carrier Frequency Domain Equalization in Wideband High Frequency Communication System

In wideband high frequency communication, the signal is transmitted by ionosphere reflection, which is affected by multipath fading of the channel in the transmission process, resulting in high bit error rate and intersymbol interference(ISI). The single carrier frequency domain equalization (SC-FDE) technology adopts traditional single carrier modulation and uses orthogonal frequency division multiplexing (OFDM) for reference to equalize in frequency domain, which can effectively combat multipath fading of channels, but at the same time avoids the shortcomings of OFDM system, such as high peak-to-average ratio and sensitivity to frequency offset. This paper expounds the principle and implementation scheme of SC-FDE system, simulates and compares several main frequency domain equalization algorithms under two high frequency channel models, and gives the performance curves.