Research Of Wireless Networks Based On Hot Spot Coverage

Abstract:Wireless LAN(WLAN) is the local area network based on RF technology. In recent years, as the wireless data access service develops rapidly and the3G network cannot support high-speed wireless data service, people pay more and more attention to the wireless network technology and high-speed network access technology.Telecom operators is now actively upgrading the existing network and developing3G network. At the same time, they are taking great efforts to build WIFI network. The mobility advantage of the terminal has made the coverage need of WiFi change a lot and demands more network coverage area.Firstly, for the purpose of improving network coverage, this paper, based on the existing mainstream platform Atheros scheme, designs a WIFI network key device AP of which the RF performance can satisfy the requirements of operators. The AP increases PA (power amplifier), LNA (low noise amplifier), SAW (surface acoustic wave filter), which increases its transmission power, enhances its receiving sensitivity, and enables it to have certain ability to coexist with other communication equipment. According to customers needs, the wireless target of AP is designed, at first, the transmit chain is simulated through ADS software, next, through theoretical calculation, the parameters of transmitting and receiving chain are obtained. The system design is completed after selecting the key components, then, product processing and debugging are implemented, at last, product processing and debugging are implemented. On the basis of the actual measurement, the expected transmitting and receiving targets are achieved and successfully applied in the subsequent network construction.Then, this paper, in the light of the characteristics of WLAN network, introduces the process and principles of network planning, several common network modes, and specific fat thin AP network. WLAN frequency planning is researched and its frequency interference is analyzed, the frequency use strategies is made according to the actual situation of the coverage area、some measures of anti-jamming are proposed in connection with the characteristics of frequency interference and some methods are summarized to improve WLAN network signal quality. At last, in the case of WLAN network construction, In addition to programming the frequency strictly, the paper deduces the Link budget and capacity estimation in theory. After completing the Network construction, aiming at some problems of network, the paper optimizes the network in capacity、coverage and interference,and the user experience of whole network is fine.