基于STBC-SCFDE系统的信道估计算法研究  

Channel estimation algorithms for STBC-SCFDE systems

作　　者：任术波[1] 郭俊奇[1] 项海格[1] 

机构地区：[1]北京大学信息科学技术学院卫星与无线通信实验室,北京100871

出　　处：《通信学报》2009年第8期84-88,共5页Journal on Communications

摘　　要：针对频率选择性衰落信道下2发射天线的空时分组编码-单载波频域均衡(STBC-SCFDE)系统,分别设计了2种新颖的时域多天线导频序列和频域多天线导频序列,相应地提出了一种时域导频信道估计算法和一种频域导频信道估计算法,并分别进行了信道估计的MSE性能分析以及计算复杂度对比。仿真验证表明,相比传统经典多天线信道估计算法,所提2种信道算法在中低信噪比下均能实现良好的信道估计性能,为未来无线通信系统的信道估计开辟了新的解决途径。Two novel multi-antenna pilot sequences in time and frequency domains were proposed for space time block code-single carder frequency domain equalization （STBC-SCFDE） systems with two transmit antennas over fre- quency-selective fading channels. Then the two corresponding channel estimation algorithms were proposed by using time-domain pilot and frequency-domain pilot. Meanwhile, their mean square error （MSE） performance as well as com- putational complexity were analyzed and compared. Simulation results show that the two proposed algorithms achieve good channel estimation performance at low and middle signal-to-noise ratios （SNRs） compared with traditional multi-antenna channel estimation algorithms. So they open up a new solution for channel estimation in future wireless communication systems.

关 键 词：时域导频 频域导频 信道估计 计算复杂度 

分 类 号：TN911.25[电子电信—通信与信息系统]