分段副本相关器的两种快速实现

由于目标的转动或海平面的起伏，声信号在海洋中传播会发生频率上的扩展，这将引起匹配滤波器性能的衰减，此时的最佳检测器为分段副本相关器。针对分段副本相关器点处理算法的速度瓶颈问题，提出了两种基于FFT的快速算法，讨论了它们的计算量和存储量，并进行了数值仿真。结果表明，两种算法都可以在保证计算精度的同时有效提高速度。

Two fast algorithms of segment replica correlator

Due to the variation of target＇s orientation or the fluctuation of sea surface, acoustic signal will spread in frequency while propagating in the sea. Such a channel is called a frequency-spreading channel. The performance of a matched filter will be lowered under such circumstances, and the optimal detector will be the segment replica correlator （SRC）. The calculation speed is the bottleneck in SRC implementation. Two fast algorithms based on FFT are proposed and their calculation abilities and memory capacities are discussed Numeric simulation results show that the two algorithms can achieve more accuracy as well as faster speed.