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Spatial Multiplexing in Optical Wireless MIMO Communications Over Indoor Environment Daisuke TAKASE Tomoaki OHTSUKI Publication IEICE TRANSACTIONS on Communications Vol.E89-B No.4 pp.1364-1371 Publication Date: 2006/04/01 Online ISSN: 1745-1345 DOI: 10.1093/ietcom/e89-b.4.1364 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Optical Wireless Communications Keyword: optical wireless multiple-input multiple-output (OMIMO), subcarrier multiplexing (SCM), nonlinearity of LD, zero forcing (ZF), intermodulation distortion (IMD), optical modulation index (OMI), Full Text: PDF(454.8KB)>>
Summary: We propose optical wireless multiple-input multiple-output (OMIMO) communications to achieve high speed transmission with a compact transmitter and receiver. In OMIMO, by using zero forcing (ZF), minimum mean square error (MMSE) or other detection techniques, we can eliminate the interference from the other optical transmit antennas. In this paper, we employ ZF as the detection technique. We analyze the signal-to-interference-plus-noise ratio (SINR) and the bit error rate (BER) of the proposed OMIMO with a linear array and a square array of optical transmit and receive antennas, where we employ subcarrier multiplexing (SCM) for each optical transmit antenna. Note that the proposed OMIMO is applicable to other arrangements of optical transmit and receive antennas. We show that the proposed OMIMO system can realize MIMO multiplexing and achieve high speed transmission by correctly aligning the optical transmit and receive antennas and the transmitter semiangle. | |||||
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