CDMA系统的导频干扰抵消

CDMA Pilot Cancellation

CDMA蜂窝移动通信系统是一种采用多址技术的通信系统,即采用不同的地址码来区分用户、基站和信道。然而由于其在多径衰落信道中的自相关和互相关特性的不理想造成了码道之间的多址干扰。在扩频通信系统中,有效地抵消导频信道引入的多址干扰是进一步改善系统性能和提高系统容量的重要途径。

CDMA mobile communication system ad opts mul ti ple access techniques whi ch means different address codes are used to distingui sh users,base s tations or channels.However,due to the imperfection of auto-correlati on and cross-corre-lation of address codes in multiple-path fad ing channel,there is multip le access interference between chan nels.So in spr ead spectrum communication system,pil ot interference cancellation is an i mpor tant way to enhance system perfo rmance and system capacity.