M-element spread spectrum multi-user detection algorithm based on interference cancellation
Jingshun Lv, Pengfei Qin, Kang Liu · 2023
Multiple Access interference (MAI) is one of the main factors affecting the performance of M-element spread spectrum multi-user communication systems. To solve this problem, this paper proposes to use the interference cancellation multi-user detection technology at the receiving end, to reconstruct the signal decision after M element de-amplification, to get the MAI estimated signal of each user, received signal minus MAI estimated signal, so that each user can get more reliable data information, sent to the next level for M element de-amplification decision. Monte-Carlo simulation is carried out in Gaussian channel with m sequence and Gold sequence as spread spectrum codes, respectively. Comparing the simulation results, it can be seen that the algorithm can quickly suppress or even eliminate the influence of MAI on the performance of M element spread spectrum multi-user system, and improve the system capacity.