非协作通信中CPM信号相关参数盲估计技术研究.pdfVIP

摘要 摘要 现代通信的体制和形式日益丰富，在某些应用场合，需要接收端在未知发送 端任何信息的情况下完成对接收信号的解调，称这种模式为非协作通信。在非协 作通信中，必须利用现代信号处理技术对接收信号进行盲处理，估计出解调所需 参数，进而完成解调。信号参数的盲估计是其中重要一环。 连续相位调制（CPM ）信号具有很高的频谱利用率和功率利用率，已经并且 必将获得越来越广泛的应用。但其复杂性也给非协作通信背景下的应用带来了严 峻挑战。因此，对非协作通信中CPM 信号参数的盲估计进行研究具有重要的意义 和价值。 论文主要研究CPM 信号的调制指数、符号周期、载波频率和符号定时这四个 参数的盲估计。针对调制指数、符号周期和载波频偏的联合盲估计算法在实际应 用中存在的问题，结合已有算法对其进行改进，提出了新的调制指数、符号周期 和载频的联合盲估计算法；改进后算法在一定程度上降低了运算量，缩短了估计 时间，并有较高的估计精度。重点研究了非数据辅助的基于最大似然准则的CPM 信号定时同步算法。采用基于模型的设计探索算法在硬件平台上的实现，在 Simulink 中搭建了改进后联合盲估计算法的模型，该模型运行正确，估计结果与算 法仿真一致。 关键词：非协作通信，连续相位调制，参数盲估计，基于模型设计 非协作通中CPM 信号相关参数盲估计技术研究 Abstract Abstract Modern communication systems and forms are increasingly rich, in some applications, the receiver needs to demodulate the received signal without knowing any information of the sender, refer to this pattern as non-collaborative communication. In non-collaborative communication, it is necessary to utilize modern signal processing techniques on the received signal to carry out blind processing, and estimate the desired parameters, thereby completing demodulation. Blind estimation of signal parameters is an important part. The continuous phase modulation (CPM) signals with high spectrum efficiency and power utilization, has been and will get more and more extensive application. But its complexity has posed a serious challenge to the applications under the background of non-collaborative communication. Therefore, study on the blind estimation of CPM signal parameters in non-collaborative communication has great significance and value. The thesis mainly focuses on the blind estimation of four parameters such as modulation index, symbol period, carrier frequency and symb