电子信息对抗技术
電子信息對抗技術
전자신식대항기술
ELECTRONIC INFORMATION WARFARE TECHNOLOGY
2014年
3期
7-12
,共6页
欠采样%解模糊%相位差%谱峰重叠
欠採樣%解模糊%相位差%譜峰重疊
흠채양%해모호%상위차%보봉중첩
sub-sampling%solving ambiguity%phase difference%peak overlapping
提出了一种针对多信号频率估计的欠采样无模糊测频算法。该算法通过迟延相位差求出频率大致取值区间，利用欠采样频谱图得到的混叠频率与欠采样频率求出高精度频率估计值，并重点解决了当不同信号在欠采样频谱图中出现谱峰重叠时测频不准确的难题。仿真表明，该算法降低了高估计精度对信噪比的要求，且稳定性好，具有实用价值。
提齣瞭一種針對多信號頻率估計的欠採樣無模糊測頻算法。該算法通過遲延相位差求齣頻率大緻取值區間，利用欠採樣頻譜圖得到的混疊頻率與欠採樣頻率求齣高精度頻率估計值，併重點解決瞭噹不同信號在欠採樣頻譜圖中齣現譜峰重疊時測頻不準確的難題。倣真錶明，該算法降低瞭高估計精度對信譟比的要求，且穩定性好，具有實用價值。
제출료일충침대다신호빈솔고계적흠채양무모호측빈산법。해산법통과지연상위차구출빈솔대치취치구간，이용흠채양빈보도득도적혼첩빈솔여흠채양빈솔구출고정도빈솔고계치，병중점해결료당불동신호재흠채양빈보도중출현보봉중첩시측빈불준학적난제。방진표명，해산법강저료고고계정도대신조비적요구，차은정성호，구유실용개치。
A sub-sampling unambiguous frequency estimation algorithm is proposed for multi-signal. By using delayed phase difference, the ranges of frequencies are roughly obtained. Then the high-accuracy frequency estimation values are obtained because of the sub-sampling fre-quency and the aliasing frequencies which are acquired from sub-sampling spectrogram. The problem is solved that the wrong results are gained when the phenomenon of peak overlapping happen in sub-sampling spectrogram. The results of simulation show that the algorithm is stable and practical,and has lower requirement of SNR for high-precision estimation.
