Title :
Cooperative Coded Partial Retransmission scheme using Type-I HARQ and LDPC codes
Author :
de Oliveira Brante, Glauber Gomes ; Uchôa, André Gustavo Degraf ; Souza, Richard Demo
Author_Institution :
CPGEI, Fed. Univ. of Technol. - Parana, Curitiba, Brazil
Abstract :
In this paper we present a novel Hybrid Automatic Repeat reQuest (HARQ) scheme for cooperative communication systems, called Coded Partial Retransmission (CPR). The method is based on the retransmission of only a fraction of the original codeword by the cooperating nodes, applying an appropriate power allocation. Numerical results using LDPC codes and Type-I HARQ with Chase Combining show that CPR outperforms regular cooperative HARQ techniques considering both amplify-and-forward (AAF) and selective decode-and-forward (SDF) protocols. Additionally, we show that the CPR throughput, using a single relay, may be considerably larger than the throughput of some regular cooperative HARQ schemes using multiple relays.
Keywords :
amplify and forward communication; automatic repeat request; cooperative communication; decoding; parity check codes; AAF; LDPC code; SDF protocol; Type-I HARQ; amplify-and-forward; chase combining; cooperative coded partial retransmission scheme; cooperative communication system; hybrid automatic repeat request scheme; power allocation; selective decode-and-forward; Automatic repeat request; Fading; Gain; Parity check codes; Protocols; Relays; Throughput;
Conference_Titel :
Personal Indoor and Mobile Radio Communications (PIMRC), 2010 IEEE 21st International Symposium on
Conference_Location :
Instanbul
Print_ISBN :
978-1-4244-8017-3
DOI :
10.1109/PIMRC.2010.5672036