因为无线信道中噪声、多径衰落和干扰等原因造成了高误码和高丢包，这给数据的可靠传输带了来了一系列问题，所以就需要进行差错控制来保证数据的传输质量。
Due to noise , multipath fading and interference and other causes of high error and high packet loss , the error control to ensure data transmission quality are especially important .
数据传输带