The modulation bandwidth of the white-light Light Emitting Diode（LED） indoor visible light communication system is limited. Under the condition that the modulation bandwidth is limited

how to further increase the communication speed becomes a hot research topic. A Multi-ary Variable Amplitude & Period Modulation（MVAPM） technique is designed. The modulation symbol structure and its symbol parameter configuration are given. The modulation methods based on On-Off Key（OOK）

Pulse Position Modulation（PPM） and Digital Pulse Interval Modulation（DPIM） are analyzed and compared in terms of bandwidth requirements

transmission capacity

average transmit power

and packet error rate. The theoretical analysis and simulation results show that compared with the commonly used digital baseband modulation method

MVAPM has the characteristics of lower modulation bandwidth

higher symbol transmission capacity

symbol-free synchronization

higher modulation efficiency

which effectively improves the communication rate of the system.