Design of physical layer management module of optical wireless local area network

摘要

As infrared transmission has the advantages of wide bandwidth, immunity to radio interference, high security and license-free, it is an attractive alternative to radio for wireless local area networks (LAN) . The design of an interface between the high-speed optical wireless transceiver (>20Mbps) and the optical wireless LAN is presented in this paper. We transplant the IEEE 802.11 medium access control (MAC) layer protocol to our system, define and implement a new physical (PHY) layer management module. This management module can also provide us an experimental platform to analyze the performance of the modulation schemes, such as L-PPM, PIM, DH-PIM, etc. Due to its characteristics of flexibility, simplicity and low cost, the management module is a good choice for the indoor optical wireless LANs.