Adaptive change of code rate in DS-SSMA communication systems
Youngkwon Ryu, Suk Chan Kim, Iickho Song, Seong Ill Park, Hyung Myung Kim · 2002
An adaptive code rate change scheme in DS-SSMA systems is proposed. In the proposed scheme, the error correcting code rate is changed according to the channel state, the effective number of users. The channel state is estimated based on retransmission requests. The criterion for the change of the code rate is to maximize the throughput under given error bound.