多载波CDMA系统中基于干扰抵消的多用户检测法应用

Multi-carrier CDMA system using multi-user detection based on interference cancellation

将CDMA系统与OFDM系统相结合,提出了多载波CDMA系统,在该系统中应用干扰抵消算法,并对这类算法的误码性能进行了计算机仿真。结果表明:并行干扰抵消算法明显优于传统匹配滤波器检测法和串行干扰抵消算法,并且随着并行干扰消除级的增加,系统统性能将得到进一步地改善,其中第2级的干扰抵消法可获得最大的性能改善,但3级之后性能又有所下降。

Combining CDMA system and OFDM system, the paper provide a multi-carrier system which is using interference cancellation arithmetic, according to simulate this kind of arithmetic, the result confirm- parallel interference cancellation method is better than convention filter and successive interference cancellation method, and when the step of parallel interference cancellation is increasing, system will be better. If the step reaches to two, system is the best, but when the step is upping, system property is poorer.