TY - GEN
T1 - Estimate-and-forward relaying for the Gaussian relay channel with coded modulation
AU - Dabora, Ron
AU - Servetto, Sergio D.
PY - 2007/12/1
Y1 - 2007/12/1
N2 - In this work we consider the Gaussian relay channel with coded modulation at the transmitter and an orthogonal relay-destination link. We investigate the application of the estimate-and-forward (EAF) scheme with different mappings at the relay to this scenario. We show that in certain situations a three-level quantization outperforms the Gaussian mapping, which is the common practice in this scenario. We conclude that for the coded modulation scenario Gaussian quantization is good at low source-relay SNR, decode-and-forward is superior at high source-relay SNR and at intermediate SNR, methods that combine elements of both schemes are superior to these individual assignments. Another observation is that as the source-relay SNR increases, the cardinality of the auxiliary random variable can be decreased.
AB - In this work we consider the Gaussian relay channel with coded modulation at the transmitter and an orthogonal relay-destination link. We investigate the application of the estimate-and-forward (EAF) scheme with different mappings at the relay to this scenario. We show that in certain situations a three-level quantization outperforms the Gaussian mapping, which is the common practice in this scenario. We conclude that for the coded modulation scenario Gaussian quantization is good at low source-relay SNR, decode-and-forward is superior at high source-relay SNR and at intermediate SNR, methods that combine elements of both schemes are superior to these individual assignments. Another observation is that as the source-relay SNR increases, the cardinality of the auxiliary random variable can be decreased.
UR - http://www.scopus.com/inward/record.url?scp=51649098404&partnerID=8YFLogxK
U2 - 10.1109/ISIT.2007.4557362
DO - 10.1109/ISIT.2007.4557362
M3 - Conference contribution
AN - SCOPUS:51649098404
SN - 1424414296
SN - 9781424414291
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 1046
EP - 1050
BT - Proceedings - 2007 IEEE International Symposium on Information Theory, ISIT 2007
T2 - 2007 IEEE International Symposium on Information Theory, ISIT 2007
Y2 - 24 June 2007 through 29 June 2007
ER -