多进制chirp-rate键控调制及分数傅里叶变换法解调  

Multiple chirp-rate shift keying and a demodulation method based on fractional Fourier transform

作　　者：肇启明[1,2] 张钦宇[2] 张乃通[1,2,3] 

机构地区：[1]哈尔滨工业大学电子与信息工程学院 [2]哈尔滨工业大学深圳研究生院 [3]广东深圳518055

出　　处：《通信学报》2010年第6期1-6,共6页Journal on Communications

基　　金：国家重点基础研究发展计划(“973”计划)基金资助项目(2007CB310606)~~

摘　　要：基于chirp信号chirp-rate和中心频率参数与其分数傅里叶变换特性之间的明确关系,提出了一种采用分数傅里叶变换法解调的多进制chirp-rate键控调制方式,该方式具有恒包络,并具有优于MPSK的误码性能。进而,将多进制chirp-rate键控与MFSK联合使用,通过参数调整,能够获得误码率性能与频谱效率间的折中。Based on the explicit relationship between the fractional Fourier transform properties of chirp signals and their parameters（chirp-rate and central-frequency）,a novel modulation named multiple chirp-rate shift keying（MCrSK） which could be demodulated with a method based on fractional Fourier transform was proposed.This modulation holds a constant envelope and provides a better BER performance than MPSK.Further,MCrSK can be used with MFSK,which gives a trade-off between BER and bandwidth efficiency by modulation parameters adjusting.

关 键 词：chirp-rate键控 高阶调制 恒包络调制 分数傅里叶变换 

分 类 号：TN911[电子电信—通信与信息系统]