Method and apparatus for signal channel perception by cognition system

Abstract

A method and device for perceiving the system sensing channel, which mainly comprises: confirming the detecting tactics in the local perceiving system according to the occupied state of the current channel in the local perceiving system; then executing the detecting tactics and detecting the situation of channel occupation for the current channel; thereby, the embodiment of the invention agilely select the corresponding detecting operation according to the predicted time, signal type and other parameters to reduce the load caused by the periodical detection and rationally use the channel detecting resource.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and device for a cognitive system to sense a channel. Background technique [0002] Cognitive radio technology is a technology that can ensure efficient and flexible use of spectrum holes without interfering with licensed users. The spectrum holes refer to unoccupied frequency bands in a certain time and space. Since the cognitive radio technology can effectively improve the utilization rate of limited spectrum resources, the cognitive radio technology has gradually attracted extensive attention in the industry in recent years. [0003] The cognitive system based on cognitive radio technology has the ability to perceive the channel. Through this sensing function, the cognitive system can flexibly use the licensed user frequency band without interfering with the licensed user. If the cognitive system detects that the authorized user occupies the ch...

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Problems solved by technology

[0009] In the above periodic channel detection scheme, since the detection of different signals on different channels requires a large amount of terminal resources, the channel detection process will lead to excessive load on the terminal;

[0010] In the above-mentioned channel detection scheme that introduces switch variables, the complexity of the entire implementation process is high due to the need to estimate the distribution function of the channel in real time; moreover, since the channel may be occupied by a variety of authorized users and unauthorized users, it is difficult to estimate Unified switch variable distribution function about the channel, therefore, there is a certain difficulty in implementing the channel detection scheme in practical applications

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