Title :
Parallel soft spherical detection for coded MIMO systems
Author :
Nikopour, Hosein ; Khandani, Amir K. ; Saleh, Aladdin
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont.
Abstract :
A sub-optimum a-posteriori probability (APP) detector is proposed for iterative joint detection/decoding in a multiple-input multiple-output (MIMO) wireless communication system employing an outer code. The proposed detector searches inside a given sphere in a parallel manner to simultaneously find a list of m-best points based on an additive metric. The metric is formed by combining the channel output and the a-priori information. The parallel structure of the proposed method is suitable for hardware parallelization. The radius of the sphere and the value of m are selected according to the channel condition to reduce the complexity. Numerical results are provided showing a significant reduction in the average complexity (for a similar performance and peak complexity) as compared to the best earlier known method. The proposed scheme is applied for the decoding of the rate 2, 4 times 2 MIMO code employed in the 802.16e standard
Keywords :
MIMO systems; encoding; iterative decoding; maximum likelihood decoding; maximum likelihood detection; radiocommunication; coded MIMO systems; hardware parallelization; iterative joint detection-decoding; multiple-input multiple-output; parallel soft spherical detection; sub-optimum a-posteriori probability detector; wireless communication system; Detectors; Error correction codes; Hardware; Iterative decoding; Lattices; MIMO; Maximum likelihood detection; Parity check codes; Telephony; Wireless communication;
Conference_Titel :
Wireless Communications and Networking Conference, 2006. WCNC 2006. IEEE
Conference_Location :
Las Vegas, NV
Print_ISBN :
1-4244-0269-7
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2006.1696557
