Dual-time collaboration detection method for sensing idle frequency spectrum in radio frequency

Abstract

The invention applies for protecting a double coordination detection method for vacant frequency spectrum detection in a cognitive radio system, relating to a radio communication system. The method is as follows: a plurality of cognitive users which take part in coordination in a traditional coordination detection algorithm are partitioned into different groups; a cognitive user needing communication is a group leader of the group; then the purposes of reducing spending of a control channel and improving detection performance of a system are gained by coordination within groups and coordination between groups. The users within the group locally judge by using an energy-check algorithm whether a master user signal exists in a certain frequency band authorized to the master user and transmits a local judgment result to the group leader. The group leader syncretizes the local judgments to make a group judgment result. A cognitive base station further syncretizes the group judgment resultto make judgment, thus getting the final judgment of the system. Bit numbers of the judgment result transmitted to the cognitive base station are largely reduced by using the method, thus greatly saving bandwidth of the control channel, and detection performance is increased.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to cognitive radio technology. Background technique [0002] Cognitive radio is a radio system that can automatically detect the surrounding environment, intelligently adjust system parameters to adapt to changes in the environment, and operate from space and frequency without causing interference to authorized users (hereinafter referred to as primary users). , time and other multi-dimensional use of idle spectrum resources for communication. In the cognitive radio system, the idle spectrum detection technology is the key technology to determine whether the cognitive radio technology can be realized. Idle spectrum detection algorithms can be divided into two categories: multi-user cooperative detection algorithms and single-user local spectrum detection algorithms. [0003] In the cooperative detection algorithm, the detection of the primary user transmitter is to judg...

AI Technical Summary

Problems solved by technology

Aiming at the problem that in the traditional / single cooperative detection algorithm, multiple sensing users transmit their judgment results to the base station respectively, which causes a heavy burden on the control channel with limited bandwidth, a double cooperative detection algorithm for idle spectrum sensing is proposed. Suitable for cognitive radio systems with cognitive base stations

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