电子与信息学报
電子與信息學報
전자여신식학보
JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY
2013年
7期
1562-1568
,共7页
朱文涛%郑纪彬%苏涛%朱凯然%张龙
硃文濤%鄭紀彬%囌濤%硃凱然%張龍
주문도%정기빈%소도%주개연%장룡
信号检测%参数估计%线性调频连续波%循环平稳%相干平均
信號檢測%參數估計%線性調頻連續波%循環平穩%相榦平均
신호검측%삼수고계%선성조빈련속파%순배평은%상간평균
Signal detection%Parameter estimation%Linear Frequency Modulated Continuous Wave (LFMCW)%Cyclostationary%Coherent average
针对长时间积累较难在线性调频连续波信号的检测和参数估计中应用的问题,该文提出一种联合变窗长相干平均法与循环平稳法的线性调频连续波信号检测与参数估计算法。首先基于分段相干的思想采用变窗长相干平均法提高信噪比的增益,然后利用循环平稳法完成信号的检测和参数估计。该算法以较低计算复杂度实现信号的长时间积累,并且解决了起始时间给信号检测和参数估计带来的问题,在低信噪比条件下具有较好的估计性能。仿真结果验证了方法的有效性。
針對長時間積纍較難在線性調頻連續波信號的檢測和參數估計中應用的問題,該文提齣一種聯閤變窗長相榦平均法與循環平穩法的線性調頻連續波信號檢測與參數估計算法。首先基于分段相榦的思想採用變窗長相榦平均法提高信譟比的增益,然後利用循環平穩法完成信號的檢測和參數估計。該算法以較低計算複雜度實現信號的長時間積纍,併且解決瞭起始時間給信號檢測和參數估計帶來的問題,在低信譟比條件下具有較好的估計性能。倣真結果驗證瞭方法的有效性。
침대장시간적루교난재선성조빈련속파신호적검측화삼수고계중응용적문제,해문제출일충연합변창장상간평균법여순배평은법적선성조빈련속파신호검측여삼수고계산법。수선기우분단상간적사상채용변창장상간평균법제고신조비적증익,연후이용순배평은법완성신호적검측화삼수고계。해산법이교저계산복잡도실현신호적장시간적루,병차해결료기시시간급신호검측화삼수고계대래적문제,재저신조비조건하구유교호적고계성능。방진결과험증료방법적유효성。
Considering application of long time accumulation to the detection and parameter estimation of Linear Frequency Modulated Continuous Wave (LFMCW), a novel method based on the joint window-variant coherent average method and cyclostationary method is proposed to detect LFMCW signal and estimate its parameters. Firstly, the improvement of Signal-to-Noise Ratio (SNR) gain is extracted with window-variant coherent average method based on segmentation coherent. And then, cyclostationary method is utilized to finish the detection and parameters estimation of LFMCW signal. The algorithm realizes long time accumulation with low computational complexity and solves the problem brought by initial time-offset. On the low SNR condition, this method still has better estimation performance. Simulations verify the effectiveness of the method.