针对红外直射信道模型设计了一种多输入多输出室内光无线通信系统,该系统在信道数达到8时可以实现1 080Mbit/s的数据率。系统采用定长数字脉冲间隔调制(FDPIM)解决脉冲位置调制(PPM)需要符号同步和数字脉冲间隔调制(DPIM)符号长度不固定所引起的问题,对FDPIM系统的符号结构、带宽、差错率特性等方面进行了分析,并与OOK、PPM和DPIM调制方式进行了比较。仿真结果表明,系统更加适合未来低成本、高数据率室内无线通信的需求。 A multi-input multi-output indoor optical wireless communication system is designed for infrared direct channel model. The system can achieve a data rate of 1 080 Mbit / s when the number of channels reaches 8. The system uses fixed-length digital pulse interval modulation (FDPIM) to solve the problems caused by unsymmetry of pulse position modulation (PPM) and unsigned digital pulse interval modulation (DPIM), and analyzes the symbol structure, bandwidth and error rate of FDPIM system And other aspects were analyzed, and compared with the OOK, PPM and DPIM modulation. Simulation results show that the system is more suitable for the future low-cost, high data rate indoor wireless communication needs.