CAJ | 학술논문

提出了一种混合快速傅立叶变换与分数阶频率域互相关算法的新算法,对LFM信号进行检测与参数联合估计,该算法不仅能够在低信噪比条件下对 LFM 信号进行检测,还能够与匹配傅立叶变换混合求解获得包含时延及多谱勒频移(Doppler shift)参数精确参数估计.在分数阶频率域互相关中,不必进行角度的一维及二维搜索,从而避免了其效率低并且复杂的缺点,计算机的仿真结果证明了这种方法简洁以及效率高的特点.
제출료일충혼합쾌속부립협변환여분수계빈솔역호상관산법적신산법,대LFM신호진행검측여삼수연합고계,해산법불부능구재저신조비조건하대 LFM 신호진행검측,환능구여필배부립협변환혼합구해획득포함시연급다보륵빈이(Doppler shift)삼수정학삼수고계.재분수계빈솔역호상관중,불필진행각도적일유급이유수색,종이피면료기효솔저병차복잡적결점,계산궤적방진결과증명료저충방법간길이급효솔고적특점.
In the paper, a new Cross-correlation algorithm, providing detection and Joint parameters of LFM signals, is proposed based on a Hybrid Correlation Algorithm on Fractional Frequency Domain. By this algorithm, not only the echo LFM signals can be detected, but also the Doppler shifts and time delay can be estimated accurately with the Matched Fourier Transform, even for the case of the low SNR. Meanwhile, it is not necessary to search the rotated angle in the one-dimensional or two-di?mensional spaces, so that the algorithm is also simple and high efficiency. Simulation results prove the correctness of this algo?rithm.