基于数字信道化的正弦信号快速测频方法

数字信道化接收机已经在电子战等领域得到了广泛的应用,正弦信号的快速准确测频在通信侦察中有重要意义。首先分析了基于DFT多相滤波器的信道化接收机高效结构,然后讨论了一种简化的快速测频方法,提出了将信道化处理的思想引入到快速测频问题中的解决方案。理论分析和仿真结果表明,该方案集合了信道化接收机和原始快速测频算法的优点,能够简化计算,提高原始测频算法的测频精度,适用于对测频速度要求较高但对精度要求不高的场合。

A Fast Frequency Estimation Method of Sinusoid Based on Digital Channelized Receiver

Digital channelized receiver has been widely used in many fields such as electronic war. Fast frequency estimation of sinusoid is very important in communication reeon. First an efficient architecture of digital channelized receiver based on DFT poly-phase filter is analyzed, and then a fast frequency estimation method is discussed. A scheme of introducing the idea of channelized processing to the problem of fast frequency estimation is proposed. Analysis and simulation results indicate that this scheme has the advantages of both digital channelized receiver and the primary frequency estimation algorithm. It can simplify the operation and improve the precision of primary frequency estimation algorithm, suitable for the case of high estimation speed but normal estimation precision.