摘要
空时编码是实现宽带无线数据通信和下一代移动通信系统的一种极有潜力的技术。为有效的将空时分组码应用到多径衰落环境下的码分多址系统,以充分利用多个路径的信号能量,现提出了一种多径环境下空时分组译码的新方法。由于空时分组码译码与信道估计紧密相关,为此本文对多径信道估计以及信道估计误差对本方法产生的影响作研究。仿真结果表明,采用多路径译码方法可以明显提高系统的误码性能。
Space - time coding is a promising technique for high data- rate wireless communications and next generation mobile communication. For the effective application of STBC（Space - Time Block Codes） in CDMA （Code Division Multiple Access） system under the muhipath fading environment, a method of multipath space - time block decoding is presented to collect the multipath signal energy adequately. Because the scheme of space- time block decoding is correlated with channel parameters, channel estimation with multipath delay is also discussed, and the deterioration of the BER（ Bit Error Ratio） caused by the tolerance of channel estimation deviation is provided. Simulation results show that the performance of BER can be improved obviously by using this proposed method.
出处
《信息技术》
2006年第4期67-70,75,共5页
Information Technology
关键词
空时分组码
多输入单输出
多径
信道估计
STBC
multiple input single output
multipath
channel estimation
