Title :
Design of block-structured LDPC codes for iterative receivers with soft sphere detection
Author :
Radosavljevic, Predrag ; Cavallaro, Joseph R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Rice Univ., Houston, TX
fDate :
March 31 2008-April 4 2008
Abstract :
In this paper we design block-structured LDPC codes for iterative MIMO receivers with soft sphere detection in particular channel environments. The receiver EXIT charts are used as a design tool. The main design constraint is to preserve the block-structure of parity-check matrices supporting modular semi-parallel decoder architectures. We show that newly designed block-structured code profiles provide improved error-rate performance of between 0.5 dB and 1 dB in different channel environments for moderate codeword size.
Keywords :
MIMO communication; block codes; error statistics; matrix algebra; parity check codes; radio receivers; signal detection; block-structured LDPC codes; improved error-rate performance; iterative MIMO receivers; modular semi-parallel decoder architectures; parity-check matrices; receiver EXIT charts; soft sphere detection; Costs; Detectors; Error analysis; Iterative algorithms; Iterative decoding; MIMO; Mutual information; Parity check codes; Performance analysis; Throughput; code design; extrinsic information transfer (EXIT) functions; iterative receivers; low-density parity-check (LDPC) codes; performance analysis;
Conference_Titel :
Acoustics, Speech and Signal Processing, 2008. ICASSP 2008. IEEE International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
978-1-4244-1483-3
Electronic_ISBN :
1520-6149
DOI :
10.1109/ICASSP.2008.4518204
