Title :
Optimal and suboptimal receivers for maximal-rate root-LDPC codes over MIMO block-fading channels
Author :
Capirone, Daniele ; Tarable, Alberto
Author_Institution :
Politec. di Torino, Torino, Italy
fDate :
July 31 2011-Aug. 5 2011
Abstract :
This paper deals with full-diversity schemes for MIMO systems in a slowly-varying fading environment. We consider LDPC codes expressly designed for block-fading channels (rootcheck LDPC) and we couple them with spatial multiplexing, to show that they achieve diversity gain, unlike traditional LDPC codes. At the receiver, we consider an iterative turbo-like receiver, both with the optimal demodulator and a suboptimal one, based on linear MMSE filtering. To improve the performance of the latter one, a power unbalance between transmit antennas is introduced. Simulation results and semianalytical techniques like EXIT charts show that our optimized schemes do achieve full diversity.
Keywords :
MIMO communication; antenna arrays; diversity reception; fading channels; filtering theory; least mean squares methods; parity check codes; radio receivers; transmitting antennas; EXIT charts; MIMO block-fading channels; full-diversity schemes; iterative turbo-like receiver; linear MMSE filtering; maximal-rate root-LDPC codes; optimal receivers; power unbalance; slowly-varying fading environment; suboptimal receivers; transmit antennas; Antennas; Decoding; Fading; MIMO; Parity check codes; Receivers; Signal to noise ratio;
Conference_Titel :
Information Theory Proceedings (ISIT), 2011 IEEE International Symposium on
Conference_Location :
St. Petersburg
Print_ISBN :
978-1-4577-0596-0
Electronic_ISBN :
2157-8095
DOI :
10.1109/ISIT.2011.6033991