CAJ | 학술논문

GMSK具有窄带宽和恒包络的良好特性，但现行的GMSK调制暴露了码间串扰和编码增益等问题。对多进制GMSK调制展开了研究，与现行的GMSK调制性能做了比较。首先介绍了多进制GMSK调制体制的基本原理，以4GMSK为例做了相关研究，讨论了调制指数和信号相位终值，然后根据恢复出的附加相位轨迹提出了抽样法和积分法两种解调方案。最后通过Matlab仿真来分析其误码率和频谱，从而得到其传输性能。多进制GMSK的进一步研究可在更高阶调制数和提高频带利用率上展开。
GMSK구유착대관화항포락적량호특성，단현행적GMSK조제폭로료마간천우화편마증익등문제。대다진제GMSK조제전개료연구，여현행적GMSK조제성능주료비교。수선개소료다진제GMSK조제체제적기본원리，이4GMSK위례주료상관연구，토론료조제지수화신호상위종치，연후근거회복출적부가상위궤적제출료추양법화적분법량충해조방안。최후통과Matlab방진래분석기오마솔화빈보，종이득도기전수성능。다진제GMSK적진일보연구가재경고계조제수화제고빈대이용솔상전개。
GMSK has good characteristics of narrow band and constant envelope. However the current GMSK modulation system exposes the problems of inter?symbol interference and coding gain. Multi?ary GMSK modulation is investigated and its performance is compared with the current GMSK modulation. The basic principles of M?ary GMSK modulation system is intro?duced. 4GMSK modulation is considered as an example and its modulation index and signal phase terminal value is dis?cussed. Based on the additional phase trajectory the sampling method and integral method are proposed to demodulate the sig?nal. The transmission performance of modulation system is obtained by analyzing its bit error rate and frequency spectrum through Matlab simulation. Further research of M?ary GMSK can be focused on higher order modulation and improvement of bandwidth efficiency.