DocumentCode :
1662849
Title :
Transmit beamforming for line-of-sight MIMO VLC with IM/DD under illumination constraints
Author :
Saengudomlert, Poompat
Author_Institution :
Center of Res. in Optoelectron., Commun. & Control Syst. (BU-CROCCS), Bangkok Univ., Bangkok, Thailand
fYear :
2015
Firstpage :
1
Lastpage :
4
Abstract :
This paper considers the optimization of the transmit beamforming vector for line-of-sight (LOS) multi-input multi-output (MIMO) visible light communications (VLC) with intensity modulation and direct detection (IM/DD) under illumination constraints. The main objective is to maximize the signal-to-noise ratio (SNR) at the receiver subject to the constraints on the total transmit optical power from all light sources, the nonnegativity of data signal values for IM/DD, and the minimum receive optical power at selected checkpoints for the sake of illumination. The problem can be formulated as a nonlinear optimization problem, which is numerically solved using sequential quadratic programming (SQP). Compared to the baseline case with equal transmit powers at all light sources, optimizing the transmit beamforming vector can provide a significant improvement on the bit error rate (BER) performance for the same total transmit optical power.
Keywords :
MIMO communication; array signal processing; error statistics; intensity modulation; optical communication; quadratic programming; BER performance; IM-DD; LOS MIMO VLC; SNR; SQP; bit error rate performance; data signal values nonnegativity; direct detection; illumination constraints; intensity modulation; light sources; line-of-sight multi-input multi-output visible light communications; minimum receive optical power; nonlinear optimization problem; sequential quadratic programming; signal-to-noise ratio; total transmit optical power; transmit beamforming vector; Array signal processing; Bit error rate; Light sources; Lighting; MIMO; Optical receivers; beamforming; bit error rate (BER); intensity modulation with direct detection (IM/DD); multi-input multi-output (MIMO); visible light communications (VLC);
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2015 12th International Conference on
Conference_Location :
Hua Hin
Type :
conf
DOI :
10.1109/ECTICon.2015.7207079
Filename :
7207079
Link To Document :
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