模拟调频技术及应用研究

北京理工大学珠海学院2020届本科生毕业设计AbstractCPM has become an efficient modulation technology in the current technologydevelopment process,so its development speed is relatively fast.In the development of CPM,compared with other modulation technologies,it has outstanding advantages,and itsbandwidth and power utilization are relatively high.These characteristics make it play animportant role in the development of communication system,and people pay more and moreattention to it.CPM signal has many signal forms compared with other models,but thesesignal situations have a common feature that the signal envelope is constant and the phase iscontinuous,and it is mainly suitable for use in digital wireless communication in itsapplication process.In the current development of CPM signal,GMSK is one of them,and also has variousadvantages,and has been widely used in the current wireless communication system,especially in the field of mobile communication,the application of GMSK signal has played ahuge role in the development of mobile communication.In the research process of this paper,GMSK is mainly used to study and analyze the modulation and demodulation technology ofCPM signal.In the research and analysis process of this paper,the research and analysis are mainlyfocused on the generation of GMSK modulation technology and the signal model,focusing onthe analysis of its own demodulation schemes,and further understanding of the performanceof Viterbi algorithm.At the same time,for its own decision feedback score,multi bitdifferential decision detection method is further developed Step by step,it analyzes andexplores how to reduce the ISI and how to improve the BER performance.Key words:Continuous phase,MSK,GMSK,error analysis