Title :
Performance of BICM-ID with Signal Space Diversity
Author :
Tran, Nghi H. ; Nguyen, Ha H. ; Le-Ngoc, Tho
Author_Institution :
Dept. of Electr. Eng., Saskatchewan Univ., Saskatoon, Sask.
fDate :
5/1/2007 12:00:00 AM
Abstract :
This paper presents a performance analysis of bit-interleaved coded-modulation with iterative decoding (BICM-ID) and complex N-dimensional signal space diversity in fading channels to investigate its performance limitation, the choice of the rotation matrix and the design of a low-complexity receiver. The tight error bound is first analytically derived. Based on the design criterion obtained from the error bound, the optimality of the rotation matrix is then established. It is shown that using the class of the optimal rotation matrices, the performance of BICM-ID systems over a Rayleigh fading channel approaches that of the BICM-ID systems over an AWGN channel when the dimension of the signal constellation increases. Furthermore, by exploiting the sigma mapping for any M-ary QAM constellation, a very simple sub-optimal, but yet effective iterative receiver structure suitable for signal constellations with large dimensions is proposed. Simulation results in various cases and conditions indicate that the proposed receiver can achieve the analytical performance bounds with low complexity
Keywords :
AWGN channels; Rayleigh channels; computational complexity; diversity reception; interleaved codes; iterative decoding; matrix algebra; modulation coding; quadrature amplitude modulation; AWGN channel; BICM-ID; M-ary QAM constellation; Rayleigh fading channel; bit-interleaved coded-modulation; complex N-dimensional signal space diversity; iterative decoding; low-complexity receiver; rotation matrix; sigma mapping; signal constellation; signal space diversity; AWGN channels; Constellation diagram; Fading; Interleaved codes; Iterative decoding; Lattices; Modulation coding; Performance analysis; Signal design; Signal mapping;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2007.360375