无线光通信接收端设计.doc

摘 要 无线光通信又被称为自由空间光通信近年来，随着“最后一公里”对高带宽、低成本接入技术的迫切需求，在视距传输、宽带接入中有了新的发展机遇，同时由于光通信器件制造技术的飞速发展，无线光通信设备的制造成本大幅下降，得到越来越多的应用。Wireless optical communication is also called free space optical communication. In recent years, with the imperious requirement of high bandwidth and low cost technology for “last mile” technology, wireless optical communication has a new opportunity in the line-of-sight transmission and broadband access. At the same time, as the rapid development of optical communication device manufacturing technology, the manufacturing cost of wireless optical communication equipment drops sharply, and then wireless optical communication has been widely used. Thus, this paper introduces the receiving headers by infrared laser which makes a simple voice wireless optical communication. First of all, based on the wireless optical communication system, the paper introduces the design of the system and describes the characteristics of the photodiode, in the meantime, it analyses the photosensitive diode voltage current relationship under different illumination conditions and load characteristics and designs current voltage conversion circuit. Designing output amplifier circuit, which is mainly composed of operational amplifier and complementary output stage, and eliminate the distortion. Secondly, this paper will design the unit circuit simulation test and analyze influences on each several part. Finally, this article will test voice receiving headers through the equipment, and give the result analysis. Simulation and test results show that under the normal circumstances, the voice receiver machine can realize some functions. Keywords: wireless optical communication a photosensitive diode complementary output stage crossover distortion 前 言 无线光通信是自由空间激光通信(FSO)，又称无线激光通信(OWC)。激光出现以来，极大的促进了科学的发展，表现尤为突出的则是通信领域。激光具有良好的高亮度性、相干性、方向性和单色性等多个特点，这些便是激光作为光通信理想光源的依据，经过近几十年的努力，无线光通信发展巨大，自此现代无线光通信在通信技术中占了举足轻重的地位。 激光通信是一种以激光作为信息载体传递信息的通信方式。和电通信一样，激光通信也有两种形式：有线激光通信和无线激光通信。有线激光通信近