Interference suppression method and device for dynamic spectrum access system

A technology of equipment and secondary equipment, applied in transmission systems, modulated carrier systems, digital transmission systems, etc., can solve the problems that the priority of secondary equipment, interference of primary equipment, interference, etc. are not considered, and achieve the effect of joint optimization of QoS

Active Publication Date: 2017-01-04
SONY CORP
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AI Technical Summary

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

Method used

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  • Interference suppression method and device for dynamic spectrum access system
  • Interference suppression method and device for dynamic spectrum access system
  • Interference suppression method and device for dynamic spectrum access system

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Embodiment Construction

[0026] figure 1 is a schematic diagram showing the multi-antenna DSA system architecture. figure 1 The upper dotted box in represents the master system, which includes multiple master base stations N T-P and multiple master devices PUs that communicate using legally assigned frequency bands 1 -PU m . Each master device adopts multi-antenna configuration, G j Indicates the channel matrix of the main system, n p1 -n pm are the additive white Gaussian noise on the communication channel of each master device, respectively.

[0027] figure 1 The lower dotted box in represents the secondary system, which includes multiple secondary base stations N T-S and multiple sub-equipment SUs with cognitive radio technology 1 -SU k . As mentioned above, under the premise of ensuring the communication quality of the master device, the slave device SU 1 -SU k One or more of them can opportunistically access the legal frequency band of the main device to realize dynamic spectrum acce...

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Abstract

The invention discloses an interference suppression method and device for a dynamic spectrum access system. The system comprises a spectrum management device, a main system comprising a plurality of main devices, and a subsystem comprising a plurality of sub-devices. The method comprises the following steps: sending position information of each sub-device to the spectrum management device; determining a weight factor for the specific sub-device by the spectrum management device according to the received position information; and carrying out second-stage precoding, and in the second-stage precoding, utilizing the weight factor to adjust estimation of power revealed by the specific sub-device to other sub-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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W72/08
CPCH04W16/10H04W72/54H04W16/14H04J11/0023H04B17/345H04B7/086H04B7/0617H04W16/28H04W72/541H04W72/56H04W52/34H04L27/00H04L27/2601H04B17/354H04B7/0857
Inventor 赵友平王奕腾郭欣孙晨
Owner SONY CORP
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