针对传统调制方式难以满足人们对高速通信的要求,结合Hartley变换与离散多音调制(DMT)提出一种用于可见光通信的多载波调制方式。为了实现DMT,采用Harltey变换来代替傅里叶变换,然后对调制信号进行非对称式限幅来降低LED的发射功率。仿真结果表明,相比于直流偏置调制模式,非对称限幅调制模式更为节能。 Aiming at the requirement of high-speed communication which is difficult to meet the traditional modulation methods, a multi-carrier modulation method for visible light communication is proposed based on Hartley transform and discrete multi-tone modulation (DMT). In order to achieve DMT, the Harltey transform is used instead of the Fourier transform, and the modulated signal is asymmetrically limited to reduce the emitting power of the LED. The simulation results show that the asymmetric amplitude modulation mode is more energy efficient than the DC bias modulation mode.