: 3G/4G/5G develop
: 2013-04-10 10:36:20
Description: Retransmission the HARQ mechanism of throughput and bit error rate of the relationship between the use of matlab simulation improved second-class choice. In the simulation for the encoding and decoding process is simplified: digit of the code word of the error probability analog transmission process, according to the bit error rate of the receiving end only to determine the range of code word errors median whether error correction was. Each sending a code word, the information of the receiving end according to the error median test whether error, no error is received, or request retransmission, and the program using the alternate value alternately sent the information code word and the parity check code word. When the checksum word comes, if the new codeword able to check code with the original code error correction correctly received, otherwise require retransmission.