摘要
针对实际工程中LFM信号传统试解调算法估计耗时较长，在信噪比较低的条件下存在误判的问题，采用了一种基于二分法的线性调频信号试解线调算法，通过对自相关信号估计误差进行分析，在自相关估计的调频斜率附近选择合理区间，并在该区间范围内使用二分法进行调制斜率的估计搜索。通过实验，证明所提出的方法在信噪比为-5—5dB时比传统的试解调算法减少约五倍的运算时间。
This paper focuses on the problem of the time consuming and poor anti-interference performance of traditional demodulate of modulation slope, the author advance a new demodulate method by using dichotomy, we first analyze the errors of the self-correlation estimation, then we use dichotomy on reasonable interval near the result, Through experiment, this mothed proofs effective and the coasting time reduce five times then the traditional demodulate.
出处
《电子科技》
2015年第10期15-17,共3页
Electronic Science and Technology
关键词
试解调
二分法
调制斜率
自相关
demodulation
dichotomy
modulation slope
autocorrelation
