Abstract
In this paper, we demonstrate a visible light communication (VLC) system using continuous phase modulation (CPM) and prove its advantage in energy efficiency over orthogonal frequency-division multiplexing (OFDM) scheme. Furthermore, to ensure the feasibility of broadband communications in indoor optical multipath environments, we propose algorithms including linear decomposition-based channel compensation to combat the inter-symbol-interference (ISI) and correlation matrix-based highly power-efficient CPM signal reconstruction to recover the original CPM signal without multipath effects. Additionally, in the signal reconstruction algorithm, a condition-enhanced method is proposed to solve the condition number problem of correlation matrix. The algorithms are verified and evaluated in terms of the normalized mean squared error (NMSE) simulation and bit error rate (BER) experiments. The power efficiency, the fading compensation character promote the proposed CPM transceiver to be a practical VLC candidate.
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