Title :
Adaptive change of code rate in DS-SSMA communication systems
Author :
Ryu, Youngkwon ; Kim, Suk Chan ; Song, Iickho ; Park, Seong Ill ; Kim, Hyung Myung
Author_Institution :
R/D Center, DACOM Co., Daejeon, South Korea
Abstract :
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
Keywords :
adaptive codes; channel capacity; error correction codes; feedback; multi-access systems; optimisation; pseudonoise codes; spread spectrum communication; state estimation; telecommunication channels; DS-SSMA; adaptive code rate change scheme; channel state; error bound; error correcting code rate; maximization; retransmission requests; throughput; user number; Adaptive coding; Error correction codes; Error probability; Fading; Frequency; Reed-Solomon codes; Signal processing; Signal to noise ratio; State estimation; Throughput;
Conference_Titel :
Signals, Systems, and Electronics, 1995. ISSSE '95, Proceedings., 1995 URSI International Symposium on
Conference_Location :
San Francisco
Print_ISBN :
0-7803-2516-8
DOI :
10.1109/ISSSE.1995.497967
