28 May 2013 MPPM system for indoor wireless optical communications with angle-diversity detection
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In this paper, an infrared wireless communication system based on Multiple Pulse Position Modulation (MPPM) employing angle-diversity detection is studied via simulation. The system can also be easily adapted for Visible Light Communications. MPPM is proposed as a modulation method to improve bandwidth efficiency in PPM. The system designed allows for comparing the performance based on the computation of the bit error rate (BER) as a function of the SNR for different MPPM and PPM modulation schemes employing angle-diversity detection. In this paper, two of the three ways to achieve angle-diversity detection are studied: conventional and sectored receivers. The results show a significant enhancement when angle-diversity receivers are employed, with the sectored receiver offering the highest performance. Furthermore, the results show that PPM offers a good performance for lower bit rates, though the BER increases rapidly when the bit rate is increased, even when angle-diversity receivers are used. MPPM proves to be more bandwidth efficient than PPM, since it allows to use a wider pulse for transmission of the same number of information bits per symbol.
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A. García-Viera, A. García-Viera, S. Rodríguez, S. Rodríguez, B. R. Mendoza, B. R. Mendoza, O. González, O. González, A. Ayala, A. Ayala, } "MPPM system for indoor wireless optical communications with angle-diversity detection", Proc. SPIE 8764, VLSI Circuits and Systems VI, 87640X (28 May 2013); doi: 10.1117/12.2016800; https://doi.org/10.1117/12.2016800

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