Hardware/Software Model of DCO-OFDM based Visible Light Communication SoC using DMA

In this paper we design hardware/software model of system-on-chip based visible light communication using DCO-OFDM modulation for point-to-point data transfer between PC. The designed system incorporates the ARM microprocessor with FPGA. Several critical processing system such as FFT, Viterbi decoder and synchronizer is implemented on hardware to accelerate the process, whereas the system scheduling and TCP communication between SoC and PC is done on software. For data transfer, we use DMA for stream data communication between processing element and for memory buffering. The model has been implemented and verified on ZYNQ-7000 SoC in terms of hardware resource usages and latency.