多入单出正交空时分组码系统的调制识别.pdfVIP

第37 卷第4 期 电 子 与 信 息 学 报 Vol.37 No.4 2015 年4 月 Journal of Electronics Information Technology Apr. 2015 多入单出正交空时分组码系统的调制识别 钱国兵* 李立萍 郭亨艺 (电子科技大学信息工程系 成都 611731) 摘 要：在现代无线通信系统中，采用正交空时分组码(STBC)的多天线发射技术是提高通信速率和可靠性，并且 能够实现简单译码的关键技术。该文针对瑞利信道系统模型，提出一种适用于多入单出正交空时分组码(OSTBC) 的调制识别算法。该算法通过对接收到的数据进行重排，将多入单出的系统模型转化为类似多入多出的系统模型， 并且根据信源的特殊性用最大似然的思想实现调制类型的识别。仿真结果验证了所提算法的有效性。 关键词：无线通信；调制识别；多入单出；正交空时分组码 中图分类号： TN92 文献标识码： A 文章编号：1009-5896(2015)04-0863-05 DOI: 10.11999/JEIT140644 Modulation Identification for Orthogonal Space-time Block Code in Multiple Input Single Output Systems Qian Guo-bing Li Li-ping Guo Heng-yi (Department of Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China) Abstract: In modern wireless communication systems, multiple-antenna-transmitting in association with Orthogonal Space-Time Block Code (OSTBC) is a key technology to improve communication rate, reliability, and decoding complexity. In this paper, a modulation identification algorithm is proposed which is well suitable for the Multiple Input Single Output (MISO)-OSTBC system. First, the MISO system is transformed into a Multiple Input Multiple Output (MIMO) system by reshaping the received data. Then, maximum likelihood based approach is used to identify the modulation. Simulations validate the effectiveness of the proposed algorithm. Key words: Wireless communication; Modulation identification; Multiple Input Single Output (MISO); Orthogonal Space-Time Block Code (OSTBC) 1 引言 征提出基于神经网络的识别算法，该算法能较好地 多天线发射技术是现代无线通信中用来提高通 适用于空间相关的信道模型，然而同样不能适用于 信速率和可靠性的重要技术手段