Title :
Analysis of Indoor Multiple-Input Multiple-Output Coherent Optical Wireless Systems
Author :
Ntogari, Georgia ; Kamalakis, Thomas ; Sphicopoulos, Thomas
Author_Institution :
Dept. of Inf. & Telecommun., Nat. & Kapodistrian Univ. of Athens, Athens, Greece
Abstract :
Indoor optical wireless systems (OWS) provide an attractive alternative for realizing next generation home access networks. Homodyne detection can be employed in order to enhance receiver sensitivity and spectral efficiency. In this paper, the application of space-time block-coding (STBC) techniques in a coherent OWS is theoretically and numerically investigated, taking into account the noise characteristics at the receiver. The performance of STBC multiple-input multiple-output (MIMO) systems, employing two transmit elements, is compared against single-input/single-output systems operating with the same total optical transmit power. It is shown that STBC is an effective means to increase the capacity of coherent OWS, improve their coverage, and decrease the required optical power at the transmitter. These results demonstrate the usefulness of MIMO techniques in the realization of future optical wireless local area networks.
Keywords :
MIMO communication; homodyne detection; indoor radio; next generation networks; optical fibre subscriber loops; space-time block codes; wireless LAN; Homodyne detection; MIMO technique; STBC technique; coherent OWS; indoor multiple-input multiple-output coherent optical wireless system; next generation home access network; optical transmit power; optical wireless local area network; receiver sensitivity; single-input single-output system; space-time block-coding technique; spectral efficiency; Bit error rate; Holographic optical components; Noise; Optical polarization; Optical receivers; Optical transmitters; Alamouti space-time block-coding; coherent infrared wireless;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2011.2176553
