现代电子技术
現代電子技術
현대전자기술
Modern Electronics Technique
2015年
22期
4-7
,共4页
BPSK信号%载频估计%DFT%相位差校正法
BPSK信號%載頻估計%DFT%相位差校正法
BPSK신호%재빈고계%DFT%상위차교정법
BPSK signal%carrier frequency estimation%DFT%phase difference correction method
为了实现BPSK信号载频的高精度估计,提出一种基于频率校正的高精度BPSK信号载频估计算法.算法通过非线性变换将BPSK信号的载频估计问题转化为对点频信号的估计,再用DFT对点频信号进行粗估计,针对DFT估计频率分辨率差的问题,采用相位差校正法对DFT估计频率进行校正,从而实现BPSK信号载频的高精度估计.最后,通过性能分析和计算机仿真验证了算法的有效性,其结果表明:该算法在低信噪比情况下能获得较好的估计精度,在高信噪比情况下,估计精度大幅提高.
為瞭實現BPSK信號載頻的高精度估計,提齣一種基于頻率校正的高精度BPSK信號載頻估計算法.算法通過非線性變換將BPSK信號的載頻估計問題轉化為對點頻信號的估計,再用DFT對點頻信號進行粗估計,針對DFT估計頻率分辨率差的問題,採用相位差校正法對DFT估計頻率進行校正,從而實現BPSK信號載頻的高精度估計.最後,通過性能分析和計算機倣真驗證瞭算法的有效性,其結果錶明:該算法在低信譟比情況下能穫得較好的估計精度,在高信譟比情況下,估計精度大幅提高.
위료실현BPSK신호재빈적고정도고계,제출일충기우빈솔교정적고정도BPSK신호재빈고계산법.산법통과비선성변환장BPSK신호적재빈고계문제전화위대점빈신호적고계,재용DFT대점빈신호진행조고계,침대DFT고계빈솔분변솔차적문제,채용상위차교정법대DFT고계빈솔진행교정,종이실현BPSK신호재빈적고정도고계.최후,통과성능분석화계산궤방진험증료산법적유효성,기결과표명:해산법재저신조비정황하능획득교호적고계정도,재고신조비정황하,고계정도대폭제고.
In order to realize the high-accuracy estimation for BPSK signal carrier frequency,a high-accuracy carrier fre-quency estimation algorithm based on frequency correction for BPSK signal is proposed in this paper,in which the carrier fre-quency estimation of BPSK signal was transformed into single-tone frequency estimation by nonlinear transformation,and the dot frequency signals are roughly estimated. According to the problem of poor resolution ratio of DFP estimation frequency,the phase difference correcting method is used to correct the DFT estimation frequency and achieve the high-accuracy carrier fre-quency estimation of BPSK signal. The validity of the algorithm was verified by performance analysis and computer simulation. The results indicate that the algorithm can acquire high estimation accuracy in the case of low SNR and improve the accuracy ef-fectively in the case of high SNR.
