甚小线性调频键控信号的正交性分析  

Orthogonality of Very Minimum Chirp Keying Signals

作　　者：赵幸[1] 郑国莘[1] 邱志易[1] 过冰[1] 曾凯伦[1] 

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室,上海200072

出　　处：《上海大学学报（自然科学版）》2010年第4期355-360,370,共7页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(60872021);上海市重点学科建设资助项目(S30108);上海市科委重点实验室资助项目(08DZ2231100);上海大学研究生创新基金资助项目(SHUCX092143)

摘　　要：甚小线性调频键控(very minimum chirp keying,VMCK)是一种新型的超窄带高效调制技术,通过线性调频的升频或降频来代表不同的发送信号.在产生的发送信号波形中,相位始终连续,功率谱十分集中.为了寻求VMCK的正交信号集,对chirp信号相关积分数学表达式进行推导,找到用Fresnel函数来推导其解析表达式的方法,并对其中的几种特殊情况进行具体分析,为使用VMCK实现相关通信提供了基础.Very minimum chirp keying （VMCK） is a novel high-efficiency modulation technology with ultra-narrow band. The transmitted signals use a sine-like linear frequency modulation scheme, in which the chirp up or chirp down represents different signals. The generated waveform has continuous phase and a concentrated power spectrum. In order to get an orthogonal signal set of VMCK, we derive a mathematical correlation integral expression and find the solution to give an analytic formula with the Fresnel function. A detailed analysis on some special situations is given.

关 键 词：甚小线性调频键控 线性调频 正交 

分 类 号：TN958.94[电子电信—信号与信息处理]