由于水下通信信道对光信号的衰减极大，实际通信系统的编码应具有极强纠随机差错和纠突发差错的能力。
Because of the enormous fading of the optical signal in underwater laser communication, the capacity of the error-correcting code must be well enough.
由于无线信道的高误码率和突发错误的特性，在无线at M中必须使用有效的差错控制机制。
In wireless ATM network, an efficient error control mechanism has to be used because of the high bit error rate and burst nature of bit errors.
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