High-speed power-efficient indoor wireless infrared communication using code combining .II

For pt.I see ibid., vol.50, no.7, p.1098-1109 (2002). We examine an infrared link composed of a multibeam transmitter and a direction-diversity receiver, employing code combining. The latter represents an added dimension to the conventional diversity concepts, which are limited to combining the indi...

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Bibliographic Details
Published in:IEEE transactions on communications 2002-09, Vol.50 (9), p.1495-1502
Main Authors: Akhavan, K., Kavehrad, M., Jivkova, S.
Format: Article
Language:English
Subjects:
Adaptive optics
Bandwidth
Bit error rate
Channels
Convolutional codes
Diversity reception
High speed
High speed optical techniques
Indoor
Infrared
Optical fiber communication
Optical receivers
Optical transmitters
Receivers
Spectra
Utilization
Wireless communication
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Summary:For pt.I see ibid., vol.50, no.7, p.1098-1109 (2002). We examine an infrared link composed of a multibeam transmitter and a direction-diversity receiver, employing code combining. The latter represents an added dimension to the conventional diversity concepts, which are limited to combining the individual received symbols. Rate-compatible punctured convolutional codes are used to encode intensity-modulated on-off keying (OOK) optical power, to create an adaptive environment for efficient utilization of channel spectral bandwidth, to provide a means for accurate channel estimation, and to maintain a guaranteed bit error rate (BER) performance at all receiver positions. It is shown that a BER not exceeding 10/sup -9/ with 99% probability can be achieved at bit rates up to a few hundreds of megabits per second, at very low transmitted power levels.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2002.802565