Design of block-structured LDPC codes for iterative receivers with soft sphere detection

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.

• Type: Conference
• Year: 2008
• Where: ICASSP
• Authors: Predrag Radosavljevic, Joseph R. Cavallaro
• Keywords: Block-structured Ldpc Codes, Channel Environments, ICASSP 2008, Particular Channel Environments, Signal Processing