基于有源频谱压缩结构码域发送参考的Chirp超宽带捕获算法研究  

Research of acquisition algorithm in Chirp code-orthogonalized transmitted-reference UWB based active spectrum compression

作　　者：万磊[1] 康荣宗[1] 张剑[1] 刘洛琨[1] 

机构地区：[1]解放军信息工程大学信息工程学院,郑州450002

出　　处：《计算机应用研究》2010年第6期2236-2238,2256,共4页Application Research of Computers

基　　金：国家"863"计划资助项目(2009AA011205);国家科技重大专项资助项目(2009ZX03006-008)

摘　　要：根据Chirp超宽带系统原理和思想,给出了一种基于有源频谱压缩和FFT频域检测的新捕获算法。该算法通过有源频谱压缩将Chirp信号转换成差频信号,再通过FFT进行频偏估计,结合滑动相关判决实现捕获。该捕获方法具有实现结构简单、采样速率低、便于进行通信距离的扩展等优点。理论分析和仿真结果表明了该捕获方法具有很强的实用价值。This paper proposed a novel acquisition method based on the principle of dechirp and FFT detection in frequency domain in Chirp-UWB communication system.After active spectrum compression processed to change the Chirp signal to single frequency signal,the acquisition process used FFT to estimate the frequency offset,and combined the sliding correlation detection method to accomplish synchronization.This method has several merits, for example,simple implement structure, low need for A/D, less sensitive to phase, easy to expand the communication distance, etc.The theory analysis and simulation result demonstrates that this acquisition method has a well practicability.

关 键 词：超宽带 CHIRP 有源频谱压缩 正交码参考 捕获概率 虚警概率 

分 类 号：TN913[电子电信—通信与信息系统] TP301.6[电子电信—信息与通信工程]