Patent ID: 9161250
Filing Date: 2015-10-13
Classification: H04B,H04W

Abstract:
1. A method of scanning a transmission spectrum, the method comprising: analysing received signals over the transmission spectrum to determine an estimate of signal strength of the received signals as a function of frequency over the transmission spectrum; using the estimate of the strength of the received signals to identify candidate transmission channel frequencies within the transmission spectrum by: (i) performing edge detection on the estimate of the strength of the received signals in the frequency domain, and (ii) using the edge detection to search for a pattern in the estimate of the strength of the received signals in the frequency domain which is indicative of a candidate transmission channel, said pattern comprising a rising edge, a frequency interval and a falling edge, wherein the frequency interval between the rising edge and the falling edge is suitable for a transmission channel; and performing a targeted scan over the transmission spectrum based on the identified candidate transmission channel frequencies to thereby identify at least one transmission channel within the transmission spectrum.