In order to investigate the potential broadband communication performance of multi-prime color light-emitting diode (LED),a vi sible light communication (VLC) system based on multi-prime color LED and orthogonal frequency division multiplexing (OFDM) is proposed.In the proposed system,the transmitter adopts M-prime color LE Ds as the transmitting antenna and uses OFDM technology to modulate the binary data.By the method of two-dime nsion (2-D) to M-dimension (M-D) real vector and bipolar encoding scheme,the modulated compl ex signals are converted into an M-D vector signal and then it drives M-prime color LEDs to e mit compound light signals. The receiver adopts M photo diodes with different color filters in the front end to receive the compound optical signals.The simulation results show that under the same symbol error rate,the new system has about 2dB signal-to-noise ratio (SNR) gain than the classic asymmetrically clipped optical OFDM (ACO-OFDM) VLC syste m in additive white Gaussian noise (AWGN) and measured channel.