Method and device for suppressing interference in dynamic spectrum access system

Abstract

Disclosed are a method and equipment for suppressing interference in a dynamic spectrum access system. The system includes a spectrum management device, a primary system including multiple primary devices, and a secondary system including multiple secondary devices, and the method includes: sending location information of each of the secondary devices to the spectrum management device ; the spectrum management device determines a weighting factor for a specific secondary device according to the received location information; and performs a second level of precoding, in which the weighting factor is used to adjust the weighting factor for the second level of precoding An estimate of the power leaked by said particular secondary device to other secondary devices.

Description

technical field [0001] The present invention relates to a method and device for suppressing interference in a dynamic spectrum access system, more particularly, to a method and device for suppressing interference in a dynamic spectrum access system capable of distinguishing priorities of secondary devices. Background technique [0002] With the rapid development of information technology and multi-service wireless networks, people's demand for broadband wireless services continues to increase, and spectrum, a non-renewable precious resource, is gradually becoming scarce. However, the existing fixed spectrum allocation strategy causes many spectrums allocated to licensed users to be idle in certain periods of time, resulting in low spectrum utilization and large spectrum waste. The appearance of Cognitive Radio (CR) technology improves spectrum utilization and alleviates the problem of insufficient spectrum resources, so it has become a research hotspot in the field of wirele...

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Problems solved by technology

[0004] Although the introduction of cognitive radio technology can improve the problem of insufficient spectrum resources, since different modulation signals are transmitted on the same frequency band, the signals sent by the secondary equipment may interfere with the main equipment in the same frequency band, so advanced algorithms are required to control The operating frequency and transmit power of the secondary device to ensure the communication quality of the primary device

In addition, secondary devices occupying the same frequency band will also interfere with each other, so the interference between secondary devices also needs to be considered

[0005] For DSA systems with different priorities (or QoS guarantee levels) for secondary devices, it is necessary to design an interference suppression method that takes into account the priority of secondary devices and guarantees different QoS for secondary devices with different priorities. Interference mitigation methods do not take into account the priority of secondary devices

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