Research on the Signal Random Attenuation Coefficient Based on RSSI in WSN Localization Technology

Localization technology is the important supporting technology in wireless sensor networks. Positioning precision is largely determined by ranging precision in the localization technology based on the distance. Traditional RSSI ranging method exists some problems of path loss model complex, serious signal concussion caused by environmental changes, which leads to ranging error and so on. According to the above problems, the RSSI ranging method which uses anchor nodes to aided ranging based on signal random attenuation coefficient is proposed. In this ranging method, path loss model need not to be established, furthermore, attenuation coefficient is in using when needs, and the ranging error caused by serious signal concussion as a result of environmental change is reduced, thus the ranging method has good environment adaptability.