Title :
An Efficient QRD-M Algorithm Using Partial Decision Feedback Detection
Author :
Jeon, Kihwan ; Kim, Hyounkuk ; Park, Hyuncheol
Author_Institution :
Sch. of Eng., Commun. Univ., Daejeon
fDate :
Oct. 29 2006-Nov. 1 2006
Abstract :
This paper presents a reduced-complexity QRD- M algorithm using partial decision feedback (DF) detection. Adaptive QRD-M algorithm obtains the threshold value through the simulation to prune off paths at each stage. However, the proposed algorithm efficiently acquires the threshold value using partial DF detection at each stage. In 4 times 4 V-BLAST system with 16-QAM, the complexity of the proposed algorithm is approximately 50 % lower than that of adaptive QRD-M algorithm at Eb/No = 16 dB. Moreover, the effectiveness of complexity reduction is especially predominant at low signal- to-noise ratio (SNR).
Keywords :
MIMO communication; antenna arrays; maximum likelihood detection; quadrature amplitude modulation; ML detector; QAM; V-BLAST system; multiple antennas; multiple-input multiple-output system; partial decision feedback detection; reduced-complexity QRD-M algorithm; wireless communication; Computational complexity; Detectors; Feedback; Information technology; MIMO; Maximum likelihood decoding; Maximum likelihood detection; Receiving antennas; Transmitting antennas; Tree data structures;
Conference_Titel :
Signals, Systems and Computers, 2006. ACSSC '06. Fortieth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
1-4244-0784-2
Electronic_ISBN :
1058-6393
DOI :
10.1109/ACSSC.2006.355041