本文对数字时间互相关积累,及与之相适配的信号调制方式的原理和结构作简要讨论,估算了其虚警概率、检测概率和输入信噪比。理论分析和现场实验证明了互相关积累,如同自相关积累一样,能适应于时-空变、多途和噪声控制的浅水声信道,具有低速率意义下的普适性。 This paper briefly discusses the principle and structure of digital time cross-correlation accumulation and its corresponding signal modulation method, and estimates its false alarm probability, detection probability and input signal-to-noise ratio. Theoretical analysis and field experiments prove that the cross-correlation accumulation, like autocorrelation accumulation, can adapt to the time-space-change, multipath and noise control of shallow water acoustic channel, with the universality of low-rate sense.