Paper Info
Title
Development of 4×4 MIMO-QPSK demodulator using complexity-reduced MLD with block QR decomposition
Abstract
The authors have been researching large capacity transmission technology using a 4×4 multiple-input multiple-output (MIMO) system to develop Super Hi-Vision (SHV) wireless cameras. As the number of transmitting antennas increases, such as in a 4×4 MIMO system, the complexity of signal detection by maximum likelihood detection (MLD), which is the best technique to achieve a low bit error rate (BER), increases exponentially. To solve this difficulty, we have proposed a complexity-reduced MLD using block QR decomposition. In this report, we described our development of an experimental system of a 4×4 MIMO-quadrature phase shift keying (MIMO-QPSK) demodulator using our technique and evaluated the effectiveness of complexity reduction and the BER. The results showed that the proposed MLD reduces multiplications to 54 % and additions-subtractions to 56 % compared with those of the conventional MLD, while the loss of required C/N due to hardware implementation was suppressed less than 1 dB.
Year
DOI
Venue
2016
10.1109/BMSB.2016.7521928
2016 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB)
Keywords
Field
DocType
Multiplexing,Wireless Camera,MIMO,MLD,Complexity Reduction
Demodulation,Multi-user MIMO,Control theory,Computer science,Algorithm,MIMO,Real-time computing,Reduction (complexity),QR decomposition,Orthogonal frequency-division multiplexing,Phase-shift keying,Bit error rate
Conference
ISSN
ISBN
Citations 
2155-5044
978-1-4673-9045-3
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Fumito Ito101.01
Takayuki Nakagawa221.50
Hiroyuki Hamazumi3417.17
Kazuhiko Fukawa421239.25