频率选择性信道下高速数据传输中的单载波频域均衡技术  

Single Carrier Frequency Domain Equalization for High Data Rate Transmission Systems over Frequency Selective Fading Channels

作　　者：杜鹏[1] 李强[1] 毕光国[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《电路与系统学报》2004年第2期18-21,共4页Journal of Circuits and Systems

基　　金：国家863计划资助项目(2001AA123015)

摘　　要：本文利用空时联合检测的方法,提出了在频率选择性信道下多天线发送的单载波频域均衡方案,它可以提供和一个发送天线多个接收天线单载波系统相同的分集增益,和单载波时域均衡相比具有低的复杂度。分析了信道估计误差对系统的影响,类似于基于迫零算法的线性均衡器的情形,在低信噪比下,信道估计误差对系统影响很大,给出了一种简单的克服方法。在不增加发射功率的情况下,使用信道编码可以进一步改善系统的性能。本方案的系统性能在6径典型城市信道模型下进行了评估,仿真的结果证明了本方案的有效性。A equalization scheme in single carrier frequency domain for multiple transmission and multiple receive antenna high data-rate communication systems is proposed. By means of this scheme, same diversity gains as the system with one transmission antenna and multiple receive antennas can be achieved at low complexity over frequency selective fading channels. The impact of channel estimate error on the frequency domain equalization is analyzed. This is critical when the SNR is as low as in a zero forcing based time domain linear equalization system. Without extra power consumption, system performance can be improved by channel coding. The performance of the proposed scheme is evaluated over TU6 channel model. Excellent system performance is verified by numerical simulation.

关 键 词：频域均衡 发送分集 空时联合检测 

分 类 号：TN92[电子电信—通信与信息系统]