The physical layer module includes channel coding and decoding part, modulation and demodulation part.
物理层模块包括信道编解码和调制解调部分。
参考来源 - 水声通信网物理层和网络层仿真技术研究The technology of this part is composed by four parts: speech encoding and decoding, channel encoding and decoding, Viterbi equilibrium and decoding, SIM card driving.
这部分技术包括四部分：语音编解码，信道编解码，Viterbi均衡和解码，SIM卡驱动。
参考来源 - GSM手机物理层关键技术的研究与实现·2,447,543篇论文数据，部分数据来源于NoteExpress
设计中采用了DSP、低比特率语音压缩编解码、信道复用、快闪存储、串口和调制解调器通信等技术。
In this design many technologies such as DSP, low bit-rate speech compression, channel multiplexing, Flash Memory and communication with modem through se rial port are used.
先分析了RS码的编解码原理，RS（204，188）码可以纠错8位的随机误码，适用于DVB标准数字电视的信道纠错。
RS(204,188)are capable of eight random error correcting which is applicable in DVB standard digital television channel error correction.
在研究红外信道特性的基础上，给出了一种用于提高红外无线互联网接入速率的HHH(1,13)码的编解码方案。
At last, it gives out a coding and decoding scheme of HHH (1, 13) code, which can advance the connection speed of infrared wireless Internet.
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