基于残差的正交时频空异步消息传递算法OA北大核心

As a promising modulation scheme,orthogonal time frequency space(OTFS)modulation can significantly improve the robustness of communication systems in high-mobility scenarios.The traditional OTFS synchronous message passing(MP)detection algorithm and its variants need to update and pass all the information every iteration,resulting in slow convergence speed.In order to solve above problems,an OTFS asynchronous message passing algorithm based on residuals is proposed.The algorithm uses the difference before and after the message update as the informed scheduling information to control the order of message delivery,so as to realize the non-uniform distribution of iterative resources.The simulation results show that compared with the traditional synchronous messaging algorithm,the residual-based OTFS asynchronous messaging algorithm reduces the number of iterations by 45%and improves the bit error performance by 7 dB when the signal-to-noise ratio is 20 dB.