分段Chirp－Z变换及其在目标速度跟踪中的应用

The Segment Chirp-Z Transform and Its Application to Tracking Moving Target Velocity

提出一种用于ＰＤ雷达动目标速度跟踪的修正Ｃｈｉｒｐ－Ｚ变换─—分段Ｃｈｉｒｐ－Ｚ变换算法（ＳＣＺＴ），该方法不仅充分利用了ＣＺＴ算法的窄带信号分析能力，而且克服了运算量大的缺点，可在较小的存贮器空间处理较大的数据量，降低了设备成本，有利于并行实现，提高了实时性，在ＰＤ雷达目标速度跟踪中，大大增加了跟踪精度和灵活性。计算机模拟证明，ＳＣＺＴ算法在目标速度跟踪中具有一定的实用价值。

It is the purpose of this paper to introduce a modified Chirp-Z transform-SegmentChirp-Z Transform (SCZT ),and its application to tracking the velocity of moving target in pulseDopplar radar. The approach not only shows very good ability in analysing narrow-band signals,but also can cut down the cost of equipment and reduces the loud of computaion. The SCZT algorithm is easy to implement parallelly. The frequency spectrum interval analysed and the frequency resolution Can be determined by users. On the other hand,the proposed algorithm greatly increases the tracking accuracy and the flexibility in tracking target velocity in pulse Dopplar radar.Computer simulation demonstrates the validity of the algorithm in tracking the velocity of movingtarget.