ST-OFDM系统载波干扰抑制技术研究  

Suppression of intercarrier interference in ST-OFDM systems

作　　者：苗睿锋[1] 王永生[1] 

机构地区：[1]西北工业大学电子信息学院,西安710072

出　　处：《微计算机应用》2005年第4期393-397,共5页Microcomputer Applications

摘　　要：分析了ST-OFDM系统中载波间干扰的具体内容,提出了一种ST-OFDM系统中载波间干扰线性抑制技术,利用连续发射已知ST-OFDM符号来估计ST-OFDM中各个子载波对其他子载波的干扰,然后通过特定的线性运算达到ST-OFDM载波间干扰的抑制。仿真结果表明,使用与不使用载波干扰抑制技术ST-OFDM系统可获得至少4dB性能增益,而且选择6-10个相邻子载波干扰系数可以使ST-OFDM系统在性能和运算量上获得最佳。莱斯衰落信道下该线性抑制方法可较有效克服ST-OFDM系统的载波间干扰。Those are studied in this paper that intercarrier interference (ICI) and a method for suppressing ICI in ST-OFDM system. A Topelitz matrix is computed to get ICI co efficiencies in ST-OFDM, and then the results are used in a linear algorithm to suppress ICI. Simultaneously a partial ICI suppression is studied to provide gain in complexity and performance. Simulations indicate the ICI suppression method provides a gain of 4dB at least; furthermore, the more efficiency of partial ICI suppression is obtained by employing 6-10 ICI co efficiencies. The linear method studied in this paper can suppress the ICI more effectively in ST-OFDM over Rician fading channel.

关 键 词：ST-OFDM系统 载波干扰抑制技术 信号模型 信噪比 载波通信 

分 类 号：TN975[电子电信—信号与信息处理]