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A Multi-Antenna-Based Spatial Spectrum Sensing Method

A spectrum sensing and multi-antenna technology, which is applied in the field of airspace spectrum sensing based on multi-antennas, can solve the problems of limited spectrum development capabilities and achieve the effects of improving spectrum utilization, increasing implementation complexity, and increasing system capacity

Active Publication Date: 2021-05-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although the spectrum sensing algorithm in the traditional dimension improves the detection performance to a certain extent, it mainly performs detection in the frequency dimension, time dimension and geographical latitude, and the spectrum development capability is limited

Method used

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  • A Multi-Antenna-Based Spatial Spectrum Sensing Method
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  • A Multi-Antenna-Based Spatial Spectrum Sensing Method

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Embodiment Construction

[0039] The technical solution of the present invention has been described in detail in the part of the content of the invention, and the practicability of the present invention will be illustrated below in conjunction with a simulation example.

[0040] Assume that there is only one primary user (D=1) with a frequency point f, the transmitted signal is a QPSK signal, the number of uniform circular array antennas is M=16, and the number of sampling points N=10000.

[0041] First, the relationship between the signal-to-noise ratio and the detection probability of the detection schemes is compared for different α values. The simulation results are shown in the figure. In this simulation, set the false alarm probability P fa =0.01, SNR=-24:2:4, the number of Monte Carlo simulations under different signal-to-noise ratios (SNR) is 2000 times. Depend on image 3 and Figure 5 It can be seen that when α∈[0.1,1], the smaller the value of α, the better the detection performance of t...

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Abstract

The present invention is a cognitive radio technology field, which involves a multi -antenna -based airspace spectrum perception method.The present invention is a space -spectrum perception method for the space angle dimension as a new spectrum opportunity. It is estimated that the signal space angle of the angle of the angle of the angle of the signal space can be used to avoid the direction of the main user's communication or the direction of the communication direction of the main user.For the design of zero -trap antenna beam design, so that cognitive users can avoid the communication direction of the main user at the same frequency, at the same time, and even the same place.Rate.The present invention uses space angle information as a new spectrum opportunity to detect the spectrum cave of the space angle of the angle of the angle. Compared with the spectrum perception algorithm of the traditional dimension, although the complexity is increased, the system capacity is increased, the spectrum has increased the spectrum spectrumUtilization rate.

Description

technical field [0001] The invention belongs to the technical field of cognitive radio, and in particular relates to a multi-antenna-based spatial spectrum sensing method. Background technique [0002] With the continuous development of wireless communication, spectrum resources become more and more scarce, which seriously restricts the development of communication technology. To promote the development of wireless communication, it is necessary to improve the utilization rate of spectrum resources, among which cognitive radio (CR) technology is an effective method to solve the shortage of spectrum and improve the utilization rate of spectrum resources. The basic idea of ​​CR is spectrum sharing or spectrum reuse. One of its features is to allow unlicensed cognitive users (CUs) to access licensed frequency bands without interfering with licensed primary users (PUs). To achieve this goal, the Cognitive User (CU) system must constantly detect whether the authorized primary us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/382
CPCH04B17/382
Inventor 陈云华史治平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA