A novel power and offset allocation method for spatial multiplexing MIMO Systems in optical wireless channels

Ki Hong Park, Young Chai Ko, Mohamed Slim Alouini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

We consider optical wireless communication which can be utilized for illumination and communication by relying on lighting devices. Due to the limited bandwidth of optical sources, it is challenging to achieve high data rate in optical wireless systems. In order to obtain a multiplexing gain and high spectral efficiency, we design an optical multi-input multi-output (MIMO) system utilizing a singular value decomposition-based spatial multiplexing and adaptive modulation. We note that the conventional allocation method in radio frequency MIMO channels cannot be applied directly to the optical intensity channels. In this paper, we generalize the result of power allocation method in [1] for arbitrary number of transmit and receive antennas in optical wireless MIMO systems. Based on three constraints, namely, the nonnegativity, the aggregate optical power, and the bit error rate requirement, we propose a novel method to allocate the optical power, the offset value, and the modulation size for maximum sum rate. From some selected simulation results, we show that our proposed allocation method gives a better spectral efficiency than the method that allocates the optical power equally for each data stream.

Original languageEnglish
Title of host publication2011 IEEE GLOBECOM Workshops, GC Wkshps 2011
Pages823-827
Number of pages5
DOIs
Publication statusPublished - 2011
Event2011 IEEE GLOBECOM Workshops, GC Wkshps 2011 - Houston, TX, United States
Duration: 2011 Dec 52011 Dec 9

Publication series

Name2011 IEEE GLOBECOM Workshops, GC Wkshps 2011

Other

Other2011 IEEE GLOBECOM Workshops, GC Wkshps 2011
CountryUnited States
CityHouston, TX
Period11/12/511/12/9

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Communication

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