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本文探讨了在宽带被动声纳信号处理中,利用宽带信号相关性的特点,采用不补零的相关算法进行宽带信号被动时延估计,并得到较为理想的结果,为工程实现带来许多方便。最后给出了补零处理和不补零处理的计算机模拟结果,不补零处理的时延估计方差更小些。计算机模拟证明,不补零处理对信号检测和时延估计都相当满意。因此在被动声纳宽带信号处理中可以在不提高机器运算速度的情况下,达到不损失处理增益。
In this paper, we discuss the use of wideband signal correlation in wideband passive sonar signal processing, and adopt the non-zero correlation algorithm to estimate the passive delay of wideband signal, and obtain the ideal result, which brings many conveniences for the project implementation. Finally, the computer simulation results of zero-padding and non-zero-padding are given. The variance of delay estimation without zero padding is smaller. Computer simulations show that non-zero processing is quite satisfactory for signal detection and delay estimation. Therefore, in passive sonar wideband signal processing can not increase the processing speed of the machine without losing the processing gain.