Title :
An Low Density Parity-Check coded adaptive cooperation scheme based on Orthogonal Superposition Modulation
Author :
Xiang Chen ; Mingxiang Xie ; Zhenyu Wang
Author_Institution :
Dept. of Commun. Eng., Electron. Eng. Inst., Hefei, China
Abstract :
User Cooperation (UC) is a promising technology to obtain diversity gain at terminals. Superposition Modulation Cooperation (SMC) is a UC mode exploiting higher order modulation constellation to allow relay node (RN) transmitting his own local data together with the relay data from source node (SN). The throughput outperforms Amplify-and-Forward (AF), Decode-and-Forward (DF) and coded cooperation (CC) when channel state is good. Power allocation (PA) between the local signal and relay signal is crucial for the performance of SMC. An Adaptive Orthogonal Superposition Modulation Cooperation (OSMC) Scheme is designed based on the bit-level Mutual Information (MI) model to minimize the average outage probability of the three-node cooperation system. Moreover, Low Density Parity-Check (LDPC) code is introduced to further improve the performance. Theoretical analysis and simulation results indicate that the adaptive OSMC scheme improves the power efficiency significantly.
Keywords :
cooperative communication; parity check codes; probability; LDPC code; OSMC scheme; PA; RN; SMC scheme; SN; adaptive orthogonal superposition modulation cooperation; bit-level mutual information model; higher order modulation constellation; local signal; low density parity-check coded adaptive cooperation scheme; orthogonal superposition modulation cooperation; outage probability; power allocation; relay node; relay signal; source node; three-node cooperation system; user cooperation; Adaptation models; Binary phase shift keying; Mutual information; Relays; Signal to noise ratio; Tin; Cooperative Communication; LDPC; Superposition Modulation Cooperation (SMC); mutual information (MI);
Conference_Titel :
Image and Signal Processing (CISP), 2013 6th International Congress on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4799-2763-0
DOI :
10.1109/CISP.2013.6743860