Patent ID: 7149205
Filing Date: 2006-12-12
Classification: H04B

Abstract:
1. An interference detection method for detecting interference between one system making use of a communication method including frequency division multiplexing and time division multiplexing and another system making use of a communication method different from the communication method of said one system, said interference detection method comprising: a step (1) of measuring a received signal level for each of frequencies corresponding to carrier numbers in said one system; a step (2) of storing the received signal levels as measured in association with the respective carrier numbers; a step (3) of generating a measured level group from respective carrier numbers in said one system which are selected one after another and a plurality of carrier numbers adjacent to a selected carrier number in said one system, performing an arithmetic operation of each of the respective measured level groups, and storing each result of the arithmetic operation in association with said selected carrier number; a step (4) of comparing the results of the arithmetic operation as stored corresponding to the respective carrier numbers with a predetermined interference threshold level; and a step (5) of storing each comparison result in association with the selected carrier number, the received signal level is measured for each unit time corresponding to the slot numbers in said step (1), the received signal level as measured is stored for each carrier number and each time slot in said step (2), and the measured level groups are generated from the respective received signal levels as stored, each measured level group including the received signal levels which are measured in the time slots corresponding to said selected carrier numbers and the time slot numbers adjacent to said selected carrier numbers in a predetermined range, and subjected to an arithmetic operation respectively followed by storing each result of the arithmetic operation in association with the selected carrier number in said step (3).