Rayleigh商-降采樣濾波器在基于調(diào)頻廣播信號(hào)的單站無源定位系統(tǒng)中的應(yīng)用
Application of Rayleigh Quotient-Desampling FIR Filter in Passive Location System Using the FM Broadcast Signals
-
摘要: 根據(jù)基于調(diào)頻廣播信號(hào)的無源定位系統(tǒng)中相干脈沖壓縮處理的特點(diǎn)，指出在相關(guān)脈沖壓縮中進(jìn)行降采樣處理的可行性，并提出了以信噪比增益最大為評(píng)價(jià)準(zhǔn)則設(shè)計(jì)降采樣濾波器。推導(dǎo)了信噪比增益與降采樣濾波器權(quán)系數(shù)的關(guān)系，給出了采用Rayleigh商方法求解給出準(zhǔn)則下最優(yōu)FIR濾波器的方法和步驟。仿真實(shí)驗(yàn)驗(yàn)證了在相干脈沖壓縮中采用Rayleigh商-降采樣濾波器既降低了計(jì)算量又保證了脈沖壓縮后的信噪比增益。
-
關(guān)鍵詞:
- 無源定位;相干脈沖壓縮;降采樣濾波器;Rayleigh商
Abstract: According to the characteristic of coherent pulse compression in the passive location system using the FM broadcast signals, the desampling FIR filter is necessary and feasible. The maximum of SNR after coherent pulse compression is defined as the proper criterion for the design of the desampling filter. The relation of the SNR and the coefficients of the filter adopted is deduced. The steps by the Rayleigh quotient method to obtain the optimal desampling FIR filter are also presented. The results of simulation show that the proposed method achieves good SNR despite its low computation complexity. -
Wang Tien T. The segmented chirp Z-transform and its application in spectrum analysis[J].IEEE Trans. on Instrumentation Measurement.1990, 39(2):318-[2]YIP P C Y. Some aspects of the zoom transform[J].IEEE Trans. on Computers.1976, 25(3):287-[3]McClellan J H, Parks T. A unified approach to the design of optimum FIR linear-phase digital filter [J]. IEEE Trans. on Circuit Theory, 1973, 20(6): 697 - 701.[4]Vaidyanathan P P, Nguyen T Q. Eigenfilters:A new approach to least-squares FIR filter design and application including Nyquist filters [J].IEEE Trans. on Circuits and Syst, 1987, CAS-34(1):11 - 23.[5]徐水健,婁曉光,王貞松.拉格朗日乘子法在機(jī)載SAR成像系統(tǒng)降采樣濾波器設(shè)計(jì)中的應(yīng)用.電子學(xué)報(bào),2000,28(12):11-14[6]Medlin G W, Adams J W, Leondes C. Lagrange multiplier approach to the design of FIR filters for multirate applications [J].IEEE Trans. on Circuits and Syst.1988, 35(10):1210-[7]程云朋.矩陣論(第二版).西安:西北工業(yè)大學(xué)出版社,2000:265-276. -
計(jì)量
- 文章訪問數(shù): 2681
- HTML全文瀏覽量: 106
- PDF下載量: 736
- 被引次數(shù): 0
下載:
