Uplink Multiuser MIMO Detection Scheme with Reduced Computational Complexity

Title
Uplink Multiuser MIMO Detection Scheme with Reduced Computational Complexity
Authors
박상규
Keywords
Cholesky decomposition; fast antenna selection; multiuser MIMO; SEC; STBC
Issue Date
2015-07
Publisher
SPOLECNOST PRO RADIOELEKTRONICKE INZENYRSTVI
Citation
RADIOENGINEERING, v. 24, no. 1, Page. 98-104
Abstract
The wireless communication systems with multiple antennas have recently received significant attention due to their higher capacity and better immunity to fading channels as compared to single antenna systems. A fast antenna selection scheme has been introduced for the uplink multiuser multiple-input multiple-output (MIMO) detection to achieve diversity gains, but the computational complexity of the fast antenna selection scheme in multiuser systems is very high due to repetitive pseudo-inversion computations. In this paper, a new uplink multiuser detection scheme is proposed adopting a switch-and-examine combining (SEC) scheme and the Cholesky decomposition to solve the computational complexity problem. K users are considered that each user is equipped with two transmit antennas for Alamouti space-time block code (STBC) over wireless Rayleigh fading channels. Simulation results show that the computational complexity of the proposed scheme is much lower than the systems with exhaustive and fast antenna selection, while the proposed scheme does not experience the degradations of bit error rate (BER) performances.
URI
https://dspace.vutbr.cz/bitstream/handle/11012/38738/15_01_0098_0104.pdf?sequence=1http://hdl.handle.net/20.500.11754/26210
ISSN
1210-2512; 1805-9600
DOI
http://dx.doi.org/10.13164/re.2015.0098
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > DEPARTMENT OF ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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