【摘要】 以信道估计为基础的联合检测是TD＿SCDMA系统采用的关键技术之一,它能有效地消除多址干扰(MAI)和符号间干扰(ISI)从而提高系统容量.本文在分析TD＿SCDMA系统下行链路基带离散时间传输模型的基础上,提出了一种下行链路信道估计的快速算法,并结合终端联合检测算法进行了计算机仿真.结果表明该算法在提供同样信道估计性能的同时,计算量降低了近3阶.更多还原

【Abstract】 Channel estimation based joint detection is one of the key technologies in TD-SCDMA systems, which can be used to increase system capacity by implementing Multi-Access Interference(MAI) and Intersymbo Interference(ISI) cancellation. In this paper a fast algorithm for channel estimation in downlink TD-SCDMA systems has been proposed by analyzing the discrete-time base-band transmission model. The computer simulation result from this new algorithm cooperating with joint detection has also been given out, which shows that it can decrease the computational complexity about 3 orders while providing nearly the same estimation.更多还原