In-Band Full Duplex Self-Interference Elimination Algorithm Based on Adaptive Filtering
In order to solve the saturation problem of low noise amplifier and the analog-to-digital conversion module in in-band full-duplex communication system,the nonlinear characteristics of power amplifier and the multipath effect of signal transmission,a two-stage self-interference elimination algorithm based on adaptive filtering is proposed.On this basis,in order to solve the problem that the traditional adaptive filtering algorithm converges slowly when the channel changes,a low-complexity method for updating the initial weights of a filter in an improved recursive least squares algorithm is proposed.Simulation results show that the proposed algorithm can suppress the power of the self-interfering signal to the noise level,ensure the correct demodulation of useful signals,and effectively reduce the time required for the self-interfering signal elimination compared with the traditional adaptive filtering algorithm.
in-band full duplex communicationself-interference cancellationadaptive filtering
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