基于纠错编码联合迭代的多址干扰消除方法

在链路资源受限条件下的扩频通信应用中,多址干扰成为限制系统多用户服务能力和通信质量的最主要因素。针对多址干扰问题,提出了一种基于纠错译码联合迭代的并行多址干扰消除方法,显著改善了在多址干扰恶劣条件下,传统并行干扰消除算法多址干扰抑制性能不佳的情况,解决了传统算法难以应用于异步扩频通信系统的问题。仿真实验结果表明相比经典的部分并行干扰消除(PPIC)算法可带来7 dB以上的解调性能增益,同等链路资源可以支持更多用户数量进行通信,有效提高了扩频通信系统多用户信息传输能力。

Decode Combined Multiple Access Interference Cancellation Algorithm

In the application of spread spectrum communication with limited wireless resource,multiple access interference(MAI)is the main restraint element of the multiple user service capability and communication performance.With a focus on MAI,an error correcting code(ECC)decode combined parallel interference cancellation(PIC)method is proposed.The poor performance of PIC in the scene of heavy MAI is improved extraordinarily.The application problem of the traditional MAI cancellation method in the asynchronous system is solved.Simulation result shows that the Decode combined PIC algorithm makes the superiority of more than 7 dB compared with the traditional method.With the same wireless resource,more communication users will be supported.The multi-user service capability of spread spectrum system will be improved remarkably.