Ocean underwater channel is a stochastic acoustic propagation channel with its multipaths, time variety, and frequency spread.
海洋水声信道是多途、时变和频散的信道。
It is a true blind detection algorithm in that it needs no knowledge of channel fading information as well as time domain and frequency domain spread spectrum codes.
该算法无需时域扩频码、频域扩频码和信道衰落信息，是一种真正意义上的盲的检测算法。
Reverse-spread spectrum device, time sequence inspection device, channel evaluation device and method for measuring frequency faults.
逆扩频装置，时序检测装置，信道估计装置和频率误差测量方法。
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