Method for sensing interception node selected by radio system

Abstract

The invention discloses a method for sensing an interception node selected by a radio system. The radio system comprises a plurality of base stations and a plurality of user station equipment, wherein the base stations are used as judgment nodes, and the user station equipment is used as interception nodes. The method comprises the following steps: the judgment notes count the N time interception information of the whole interception node and groups the interception nodes according to the relativity of the interception information; detection judgment is made according to the interception information of the whole interception node at the stage; at least one interception node is selected from each group of the interception nodes as a group header interception node to feed back P time information to the judgment notes; and the judgment notes carry out data fusion processing and make detection judgment according to the selected feedback interception information of the group header interception node. The invention provides an interception mechanism based on the relativity of CPEs historic interception information statistics so as to reduce the number of CPEs participated in feedback, thereby effectively reducing the feedback information amount when the detection probability is not reduced, and the error alarming probability is not improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to a radio system interception node selection method, in particular to a method for selecting an interception node based on statistical correlation of historical interception information. Background technique [0002] In 1999, Joseph Mitola proposed the concept of Cognitive Radio (CR) on the basis of software radio. Cognitive radio is a new intelligent wireless communication technology with software radio as the extension platform, which can perceive the surrounding environment characteristics. , and automatically adjust some transmit and receive parameters of its equipment. Devices with perception capabilities can continuously monitor wider frequency bands in time domain, frequency domain and space multi-dimensional space, and can detect primary users in these frequency bands, so as to know the use of spectrum. In December 2003, the Federal Communications Commission (FCC)...

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Problems solved by technology

However, these methods for judging the interception result of the BS cannot effectively improve the detection probability PD and reduce the false alarm probability PFA, especially when intercepting the wireless microphone device, if the CPE detects that there is a wireless microphone device in use nearby When the interception result cannot be fed back to the BS, the problem of primary user hidden terminals will occur, causing interference to primary users

In addition, when some CPEs are affected by the shadow effect or are greatly affected by deep channel fading and cannot perceive primary users, when they compete or are polled as feedback CPEs, the problem of hidden primary user terminals will also occur.

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