说明：  一个关于GSM物理层协议的详细介绍,主要包括信道编解码,调制解调\信源编解码等,各位可以下下来看看,是中文版的
(One on the GSM physical layer protocol in detail, including channel coding and decoding, modulation and demodulation \ source codec, etc., you can look down, is the Chinese version of the)