Patent ID: 8938030
Filing Date: 2015-01-20
Classification: H04N

Abstract:
1. A fast blind scan method insensitive to adjacent channel interference, comprising the steps: (A) initializing pointers; (B) configuring a tuner for fetching a block of spectrum; (C) determining whether the block of spectrum contains a high spectrum signal and whether a difference between a carrier frequency of the high spectrum signal and a start pointer is greater than a first frequency gap threshold; (D) determining whether there is a full band channel in the block of spectrum when the high spectrum signal in the block of spectrum is absent or the difference between the carrier frequency of the high spectrum signal and the start pointer is not greater than the first frequency gap threshold; (E) performing a signal detection and parameter extraction operation when the full band channel exists in the block of spectrum; (F) setting the start pointer to be a frequency of a second cross point; (G) checking whether a difference between the start pointer and an end pointer is smaller than a second frequency gap threshold; and (H) setting a carrier frequency pointer when the difference between the start pointer and the end pointer is not smaller than the second frequency gap threshold, and executing step (B) to enable the tuner to fetch a next block of spectrum.