Location and Propagation Status Sensing of Interference Signals in Cognitive Radio
Kanshiro Kashiki, Mitsuo Nohara, Satoshi Imata, Yukiko Kishiki · IEICE Transactions on Communications · 2008
In a Cognitive Radio system, it is essential to recognize and avoid sources of interference signals. This paper describes a study on a location sensing scheme for interference signals, which utilizes multibeam phased array antenna for cognitive wireless networks. This paper also elucidates its estimation accuracy of the interference location for the radio communication link using an OFDM signal such as WiMAX. Furthermore, we use the frequency spectrum of the received OFDM interference signal, to create a method that can estimate the propagation status. This spectrum can be monitored by using a software defined radio receiver.