Advanced Approximation of Channel Quality in a VLC CDM System

Szabó, Gábor and Udvary, Eszter (2018) Advanced Approximation of Channel Quality in a VLC CDM System. INFOCOMMUNICATIONS JOURNAL, 10 (2). pp. 7-12. ISSN 2061-2079

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Abstract

Expanding the functionality of LED indoor lighting with visible light communication (VLC) allows an additional communication channel beside wireless radio in buildings. This service may be based on various channel access methods and modulation types. Code division multiplexing (CDM) is a suitable method to such an application, but it is complicated to measure the signal quality which is essential to compare different codes and settings, and necessary for some applications like position-dependent information services. Computing crest factor is a suitable method to estimate quality, but it may be inaccurate in some cases. This paper presents novel methods to approximate the quality of received CDM signals along with the crest factor, aiding the more accurate investigation of the VLC CDM technique.

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