Title :
Improved 2-Step QRM-ML Block Signal Detection for Single-Carrier Transmission
Author :
Temma, Katsuhiro ; Yamamoto, Tetsuya ; Adachi, Fumiyuki
Author_Institution :
Dept. of Electr. & Commun. Eng., Tohoku Univ., Sendai, Japan
Abstract :
A new 2-step maximum likelihood block signal detection employing QR decomposition and M-algorithm (QRM-MLBD) is proposed to further reduce the computational complexity while keeping a good bit error rate (BER) performance for the single-carrier (SC) transmission in a frequency-selective fading channel. Prior to QRM-MLBD, a computationally efficient minimum mean square error based frequency-domain equalization (MMSE-FDE) is performed to discard the symbol candidates in the tree based on the soft decision results of MMSE-FDE. We evaluate, by computer simulation, the BER performance achievable by the proposed improved 2-step QRM-MLBD and show that the proposed scheme can reduce the computational complexity compared to the previously proposed conventional 2-step QRM-MLBD while keeping the same BER performance.
Keywords :
channel estimation; communication complexity; error statistics; fading channels; frequency-domain analysis; least mean squares methods; maximum likelihood detection; signal detection; 2-step maximum likelihood block signal detection; BER performance; M-algorithm; MMSE-FDE; QR decomposition; QRM-MLBD; bit error rate; computational complexity reduction; computer simulation; frequency-selective fading channel; minimum square mean error based frequency-domain equalization; single-carrier transmission; two-step QRM-ML block signal detection; Bit error rate; Computational complexity; Computer simulation; Frequency domain analysis; Matrix decomposition; Noise;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2011 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-8328-0
DOI :
10.1109/VETECF.2011.6093118