摘要
为了研究室内多个白光LED构成的室内无线信道的特性,首先分析了多LED通信系统的基本构成,然后分析了光线追迹法求脉冲响应的基本原理和基本方法,提出了用简化的光线追迹法计算信道的脉冲响应,这种方法仅仅考虑三次以下的反射情况。最后,用数值仿真方法对室内信道的脉冲响应进行了研究。仿真结果表明,系统的脉冲响应以直接响应和一阶响应为主,并随接收器和发射装置的位置不同而发生变化。
For study on the channel characteristics using white LEDs, the basic construction of communication system and the principle of impulse response using ray tracing are analyzed. And then, the simplified ray tracing is proposed to calculate the channel impulse response, this method only considers the reflections within three times. Finally, numerical simulation proves the feasibility and efficiency of this method. The simulation results show that the system impulse response is with the direct and the first reaction as the main component, and varies accordingly with the location of the receiver and the transmitters
出处
《通信技术》
2011年第12期48-50,共3页
Communications Technology
关键词
信道特性
室内可见光通信
白光LED
脉冲响应
channel characteristic
visible light communication
white LED
impulse response
