調(diào)頻連續(xù)波背景下信號處理及徑向加速度估計算法研究.pdf

1、南京航空航天大學碩士學位論文調(diào)頻連續(xù)波背景下信號處理及徑向加速度估計算法研究姓名：王濤申請學位級別：碩士專業(yè)：信號與信息處理指導教師：劉渝2011-02調(diào)頻連續(xù)波背景下信號處理及徑向加速度估計算法研究 ii Abstract In this paper, the multi-component signal processing against the background of linear frequency modulated c

2、ontinuous wave (LFMCW) and radial acceleration estimation in the system of single observer passive location and tracking are discussed, A fast algorithm of parameter estimation also was addressed for wide pulse signal. T

3、he multi-component signals processing against the background of LFMCW was studied. The pulse signals can be detected and idetified from the continue-wave background by analyzing every time slice of the short-time Fourier

4、 transform exerted on the received signal and characteristics of each pulse signal’s spectrum. Subsequently, the modulation period of LFMCW can be obtained by detecting frequence jump point of Time-Frequency curve of rec

5、eived signal.The initial frequency and coefficient of frequency modulation can be estimated DPT algorithm using one modulation period singal which has no pulse signal. Finally, the parameters of the pulse signals can be

6、estimated using relative algorithms by filtering the LFMCW signal in the time segment of appeared pulse signals. A fast algorithm of parameter estimation was addressed for wide pulse signal. The coherent pulse train was

7、structured by extracting wide norm pulse signal, and the frequency was estimated using the algorithm of frequency estimation for coherent pulse train. Subsequently, the parameter of wide LFM pulse signal was estimated us

8、ing this method on the basis of DPT algorithm. An algorithm of radial acceleration estimation was proposed based on accurate time of arrival (TOA) estimations. Firstly, TOA estimation based on correlation detection was i

9、ntroduced. On that basis, TOA estimatedaccuracy can be improved by using the method of harr wavelet transform. The influence of quantization error on TOA estimatedaccuracy can be decreased by modifying TOA estimation for

10、 linear frequency modulated pulse train. Subsequently, the estimation of pulse repetition period can be obtained using TOA estimations. Finally, the basic principle of radial acceleration estimation based on accurate TOA

11、 estimations was analyzed and the accurate estimation of radial acceleration was realized using estimation of TOA and pulse repetition period. Keywords: multi-component signals processing, Short-Time Fourier Transform,