摘要
在通信系统中,对发送方信号进行解调是必要的。接收方往往需要设计出一种频谱利用率高,抗干扰性强的信号调制方式,连续相位调制就具有这种特性,但由于调制过程中涉及到参数过多,解调算法的复杂度比较高,需要综合考虑解调方式,而非相干复合网格解调。为了减少频偏所带来的解调损失,利用复合网格解调算法可以解决盲解调的突出问题,通过建立算法模型,并且建立仿真实验,获得二进制下,调制指数为0.5的解调算法的抗初相性能,对于后续的解调技术的研究具有良好的积极意义。
In the communication system,it is necessary to demodulate the sender’s signal.The receiver often needs to design a signal modulation mode with high spectrum utilization and strong anti-interference.Continuous phase modulation has this characteristic.However,due to too many parameters involved in the modulation process,the demodulation algorithm is relatively complex,so it is necessary to comprehensively consider the demodulation mode,rather than the coherent composite grid demodulation.In order to reduce the demodulation loss caused by frequency offset,the outstanding problem of blind demodulation can be solved by using the composite grid demodulation algorithm.Through the establishment of algorithm model and the establishment of simulation experiment,the anti-initial-phase performance of the demodulation algorithm with the modulation index of 0.5 under binary system is obtained,which has a good positive significance for the subsequent research of demodulation technology.
作者
司维
张明
SI Wei;ZHANG Ming(Information Technology Services Office, Henan Foreign Trade School, Zhengzhou 450002, China;Department of Mechatronics and Information Engineering, Henan Vocational College of Water Conservancy and Environment, Zhengzhou 450002, China)
出处
《微型电脑应用》
2021年第6期121-124,共4页
Microcomputer Applications
关键词
CPM
复合网格解调
抗初相
频谱利用率
continuous phase modulation(CPM)
composite trellis demodulation
anti primary phase
spectrum utilization
