Title :
Iterative receiver with bit-level MIMO detection and cancellation
Author_Institution :
Sch. of Electr. Eng. & Telecommun., New South Wales Univ., Sydney, NSW, Australia
Abstract :
The iterative receiver for multiple input multiple output (MIMO) channels is investigated with the bit-level cancellation (BLC) in the paper for a modulation of square constellation. The cancellation can be used to reduce the complexity of the MIMO detection by using the extrinsic information from the channel decoder. We show that the BLC can approximate the maximum a posteriori probability (MAP) detection so that the complexity of the MIMO detection can be significantly reduced. The resulting complexity is similar to that of the conventional ing and cancellation (N/C) detector, while the performance can be close to that of the iterative receiver which can perfectly cancel the interference for 4-ary quadrature amplitude modulation (QAM).
Keywords :
MIMO systems; approximation theory; channel coding; interference suppression; interleaved codes; iterative decoding; maximum likelihood detection; modulation coding; probability; quadrature amplitude modulation; radio receivers; 4-ary quadrature amplitude modulation; BLC; MAP detection; MIMO detection; QAM; approximation; bit-level cancellation; channel decoder; extrinsic information; interference cancellation; iterative receiver; maximum aposteriori probability; multiple input multiple output; square constellation; Computational complexity; Detectors; Interference cancellation; Iterative decoding; MIMO; Maximum likelihood decoding; Maximum likelihood detection; Modulation coding; Quadrature amplitude modulation; Receiving antennas;
Conference_Titel :
Communications, 2005. ICC 2005. 2005 IEEE International Conference on
Print_ISBN :
0-7803-8938-7
DOI :
10.1109/ICC.2005.1494690