Application of blind equalization algorithm in multipath channel

摘要

5G wireless communication is widely used by many operators because of its high speed, low delay and large capacity. However, with the development of society, the environment of wireless communication channel is becoming more and more complex, which makes the signal transmission affected by multipath channel, resulting in large inter symbol interference, resulting in high bit error rate. In order to improve the quality of 5g communication, a blind equalization algorithm based on m-ldpc code is proposed. According to the time-varying fading characteristics of multipath channel, the channel model is constructed, and the input signal is recombined with M-ary LDPC code to improve the signal robustness. Then, the blind equalization algorithm is used to adaptively adjust the filter parameters to compensate for the influence caused by multipath channel, so as to reduce the inter symbol interference (ISI) and the bit error rate (BER). Simulation results show that the proposed algorithm can effectively suppress ISI, reduce bit error rate and improve communication quality.