BER performance analysis of Non-Hermitian Symmetry OFDM-VLC systems with ADC quantization noise

Abstract:

Quantization noise caused by analog-to-digital converter (ADC) gives rise to the reliability performance degradation of communication systems. In this letter, a quantized non-hermitian Symmetry (NHS) orthogonal frequency-division multiplexing-based visible light communication (OFDM-VLC) system is presented. In order to analyze the effect of the resolution of ADC on NHS OFDM-VLC, a quantized mathematical model of NHS OFDM-VLC is established. Based on the proposed quantized model, a closed-form bit rate error (BER) Expression is derived. The theoretical analysis and simulation results both confirm the effectiveness of the obtained BER formula in high-resolution ADC. In addition, channel coding is helpful in compensating for the BER performance loss due to the utilization of lower resolution ADC.

Key words:Visible light communication (VLC), Orthogonal frequency division multiplexing (OFDM), signal detector, ADCs, quantization