用时域自相关匹配方法降低OFDM系统的PAPR  

A time-domain autocorrelation matching method for reducing the PAPR of OFDM systems

作　　者：贾莹莹[1] 杨霖[1] 王田[1] 胡武君[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,四川成都611731

出　　处：《光通信研究》2013年第5期45-47,共3页Study on Optical Communications

基　　金：国家自然科学基金资助项目(61007188);高等学校博士学科点专项基金资助项目(2010018520007);中央高校基本科研基金资助项目(ZYGX2012J141)

摘　　要：对时域自相关匹配方法降低OFDM(正交频分复用)系统的PAPR(峰均功率比)进行了研究。该方法的基本思想是在时域加入一个随机序列发生器,随机序列与原始信号在时域叠加,以达到降低OFDM系统PAPR的目的,并可以在接收端实现信号的盲检测。该方法的信号处理过程是在时域,故仅需要一个IFFT(快速傅里叶逆变换)操作,就能降低计算复杂度。仿真结果表明,该方法可以获得与传统SLM(选择性映射)方法相似的PAPR和BER(误码率)性能,但计算复杂度比传统的SLM方法降低了很多,从而验证了该方法的有效性。This paper studies the time-domain autocorrelation matching method for reducing the Peak-to-Average Power Ratio （PAPR）of the Orthogonal Frequency Division Multiplexing （OFDM）system.The main idea of this method is to add a ran-dom sequence generator in time domain,in which the random sequences are overlapped to the original signals so as to reduce the PAPR of the system and perform blind detection at the receiving end.As the signal processing in this method takes place in time domain,the computational complexity can be reduced in j ust one IFFT operation.Simulation results indicate that similar PAPR and Bit Error Rate （BER）performances can be acquired in this method to those in traditional SeLecting Mapping （SLM） method but the computational complexity is much more mitigated,thus verifying the effectiveness of the proposed method.

关 键 词：正交频分复用 峰均功率比 信号盲检测 时域自相关匹配 

分 类 号：TN929.5[电子电信—通信与信息系统]