Frequency spectrum sensing method, device and system

Abstract

The invention provides a method for sensing a frequency spectrum by using the correlation among channels, which can be used for shortening the sensing time and improving the throughput under the condition of meeting the precision requirement. The method in the embodiment of the invention comprises the following steps of: acquiring correlation information among target channels; acquiring a frequency spectrum sensing result of at least one the target channel; and determining sensing results of the other target channels according to the frequency spectrum sensing result of the at least one target channel and the correlation information among the target channels. According to the embodiment of the invention, part of channels is required to carry out frequency spectrum sensing, and thus the time of a sensing period is shortened; and sensing results of other non-sensed channels are predicted and acquired by using the correlation among the channels, so that the expenditure of frequency spectrum sensing is reduced and the throughput of the system is improved.

Description

technical field [0001] Embodiments of the present invention relate to wireless communication technologies, in particular to a cognitive radio technology. Background technique [0002] With the rapid growth of demand for wireless communication services, currently available spectrum resources are becoming increasingly scarce, and thus Cognitive Radio (CR) appears. Cognitive radio is a radio system in which secondary users (unlicensed users) communicate using idle spectrum resources in multiple dimensions such as space, frequency, and time without causing interference to primary users (licensed users). In the cognitive radio system, the idle spectrum detection technology is one of the key technologies to determine whether the cognitive radio technology can be realized. Therefore, spectrum sensing has become an important technology for cognitive radio. [0003] The purpose of spectrum sensing is to monitor and detect the activity of the primary user signal on a specific freque...

AI Technical Summary

Problems solved by technology

In order to increase the sensing accuracy, the sensing time needs to be as long as possible, and the corresponding data transmission time of the secondary user is reduced, which reduces the throughput; and if the sensing time is reduced, the data transmission of the secondary user will conflict with the primary user. , also resulting in a decrease in throughput

Most of the current methods perform spectrum sensing on each target channel. Therefore, how to reduce the sensing time and improve the throughput while meeting the sensing accuracy requirements has become an important issue in the field of cognitive radio.

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