多径信道下多载波调制信号盲识别算法.PDFVIP

第 32 卷第 7 期 电 子 与 信 息 学 报 Vol.32No.7 2010 年 7 月 Journal of Electronics Information Technology Jul. 2010 多径信道下多载波调制信号盲识别算法 于志明 郭黎利 孙志国 (哈尔滨工程大学信息与通信工程学院 哈尔滨 150001) 摘 要：该文针对多径衰落信道下，基于 IFFT 实现的多载波调制信号类内盲识别问题，提出了一种基于对构造数 据矩阵进行奇异值分解的算法。在无需知道任何数据信息和扩频码类型及其长度等先验知识的条件下，根据构造数 据矩阵的较大非零奇异值个数，按照简单的判定准则，即可准确判断多载波信号的类型，取得了良好的效果。无需 传统识别算法中特征提取之后复杂的分类器设计，简化了识别流程。理论分析和仿真均验证了算法的正确性和有效 性，证明算法具有一定的理论和实际参考价值。 关键词：无线通信；多载波调制；构造矩阵；奇异值分解；非零奇异值；盲识别 中图分类号：TN92; TN911.3 文献标识码： A 文章编号：1009-5896(2010)07-1756-04 DOI: 10.3724/SP.J.1146.2009.00909 Blind Recognition Algorithm of Multi-carrier Modulation Signal under the Multi-path Channel Yu Zhi-ming Guo Li-li Sun Zhi-guo (School of Information and Communication Engineering, Harbin Engineering University, Harbin 150001,China) Abstract: In order to solve the intra-class blind recognition problem of IFFT-based multi-carrier modulation signals under the conditions of multi-path fading background, a blind identification algorithm of multi-carrier modulation signal is proposed based on singular value decomposition of structural matrix. Without any prior knowledge of data information as well as the type and length of spreading code, this algorithm can determine the type of multi-carrier modulation signal accurately according to the number of larger non-zero singular value of structural matrix in accordance with simple criteria, and have achieved good results. It does not have to design the complexity classifier in the traditional recognition algorithm after feature extraction, and simplifies the recognition process. Both the theoretical analysis and sim