Coexistence Study between UWB and WiMax at 3.5 GHz Band

The effect of UWB interference on a WiMax system operating in the 3.5 GHz frequency band has been addressed in this paper. The possible impact on WiMax performance is still a topical problem even though the European regulation bodies have paid much attention to the coexistence issue between these two systems. On the other hand WiMax industries claimed that UWB can pose a harmful threat to their user´s terminals if UWB devices are located in very close proximity less than 1 meter. Hence, UWB may need to scarify their 3.5 GHz channel or implement some suitable mitigation techniques to keep the channel alive. In this paper, the WiMax receiver characteristics have been studied by means of the noise floor, sensitivity level and some interference criteria. Also the possible impacts on their cell coverage and on outage are computed. It is shown that UWB transmit power interference will not have a destructive effect on the performance of a WiMax receiver.