【摘要】 对时分双工-码分多址系统小区间干扰进行了研究,提出了一种新的多小区多用户检测的方法来消除邻小区干扰。定义蜂窝小区和相邻的六个小区为一个扩展小区,高层在向基站传送接入用户的配置信息时,包括扩展小区内所有接入用户的配置信息。根据接收到的导频信号功率在扩展小区内确定强的邻小区干扰,并对干扰小区进行信道估计,确定干扰用户的信道化码。对期望小区内的各接入用户和确定的强干扰用户一起进行多小区多用户检测,将邻小区强干扰转化为多址干扰进行消除,从而提高系统的接收性能和小区边缘的传信率。更多还原

【Abstract】 Based on the investigation of inter-cell interference in Time Division Duplex-Code Division Multiplex Accession(TDD-CDMA)system,a novel scheme named multi-cell multi-user detection is proposed to cancell the interference.This scheme defines an extended cell including a desired cell and six adjacent cells.High layer transmits parameters of all the accessing users in an extended cell to base station.The severe interferece is judged according to the power of pilot.The scrambling codes and channelisation codes of interfering users are judged according to the received power of the pilot sequences.The received power is also used to estimate the channel characteristics of desired users and interfering users and then to estimate the data of desired users and interfering users using multi-user detection.This scheme cancels the adjacent interference by considering them as multi-accessing interference,and therefore improves the performance of the system.更多还原