Achieving near-capacity performance on multiple-antenna channels with a simple concatenation scheme

This paper proposes a capacity-approaching, yet simple scheme for multi-input multiple-output (MIMO) channels. The proposed scheme is based on a concatenation of a mixture of short memory-length convolutional codes or repetition codes and a short, and simple rate-1 linear block code, followed by either 1-dimensional (1-D) anti-Gray or Gray mapping of quadrature phase-shift keying (QPSK) modulation. By interpreting the rate-1 code and the 1-D mapping as a multi-D mapping performed over multiple transmit antennas, the error performance is analyzed in two regions. In the error-floor region, a tight union bound and the corresponding design criterion on the asymptotic performance are derived. The bound provides a useful tool to predict the error performance at relatively low bit error rate (BER) values. Based on the obtained design criterion, an optimal rate-1 code for each 1-D mapping is then constructed to achieve the best asymptotic performance. In the turbo pinch-off region, by using ex...

• Type: Journal
• Year: 2010
• Where: TCOM
• Authors: Nghi H. Tran, Tho Le-Ngoc, Tad Matsumoto, Ha H. Nguyen
• Keywords: 1-D Mapping, Asymptotic Performance, Error Performance, Software Engineering, TCOM 2010