COGNITIVE RADIO COMMUNICATION METHOD AND SYSTEM OF SUPPORTING DEGREE OF FREEDOM OF EACH USER BASED ON QUALITY OF SERVICE CORRESPONDING EACH USER

摘要

A method for adaptively determining a cognitive radio communication mode in a cognitive radio communication system includes the steps of: obtaining the minimum degree of freedom which is allowable in an antenna space corresponding to a main user device of the cognitive radio communication system; calculating interference from at least one sub user device to the main user device; and determining a cognitive radio communication mode of at least one sub user device based on the interference and the minimum degree of freedom which is allowable. [Reference numerals] (210) Obtaining the minimum degree of freedom which is allowable of a main user device; (220) Calculating interference from the main user device; (230) Determining a cognitive radio communication method; (240) Underlay method; (250) Interweave method; (260) Interference alignment is needed between sub user devices?; (270) Sub user device interference alignment; (280) Sub user interference patience; (290) Determining a transmit beam formation matrix; (AA) Start; (BB) End