Performance Analysis Of Dicode Pulse Position Modulation For Optical Wireless Communications
2007 INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS, NETWORKING AND MOBILE COMPUTING, VOLS 1-15(2007)
摘要
This paper introduces a modulation scheme, Dicode Pulse Position Modulation (DiPPM) for optical wireless communications using intensity modulation with direct detection (IM/DD). The modulation structure of DiPPM and expressions for the bandwidth-utilization efficiency, average optical power requirement and packet error rate (PER) are presented. We show that there is a built-in error checking-out performance in DiPPM, and the PER performance for DiPPM can he improved about 3 (113 by using automatic repeat request (ARQ) when an error is detected. And numerical simulation results show that, compared with OOK and 2-PPM, DiPPM displays lower packet error rate and higher power efficiency, compared with higher order PPM (bit resolution M > 2), DiPPM displays lower power efficiency and higher packet error rate but less bandwidth requirement.
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关键词
optical wireless communications, modulation scheme, DiPPM
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