How does WiMAX avoid interference with other license-exempt systems operating in the vicinity?
Interference is one of the greatest concerns when deploying in the license-exempt spectrum. WiMAX systems are able to mitigate the effect of interference better than other wireless systems. The best WiMAX systems are designed to avoid interference by using combination of techniques such as: • 802.16 Standard– The use of OFDM eliminates inter-symbol interference (ISI) problems and the complexities of adaptive equalization, ensuring high quality voice services on par with that of wired networks. OFDM results in higher resistance to multi-path fading, farther reach and higher bandwidth and capacity in the license-exempt bands. • Suitable network design – A good site-survey must provide multiple access points, such as towers and base stations, close to the clients such that a client can select the best RF connection at a particular time. Global Positioning System (GPS) synchronization prevents inter-sector and inter-base station interference by identifying the base station location and loc