IEEE 802.16 CTC Encoder and Decoder测试说明文档（编码器、解码器直接相连；编码器输出经过AWGN信道，输入解码器解码；误码率的测试）-IEEE 802.16 CTC Encoder and Decoder test documentation (encoders, decoders directly connected　the output of encoder go through the AWGN channel, then decoder decoding　bit error rate test)