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A kind of mobile authorized user spectrum detection and its geographic location estimation method and device

A technology for authorized users and spectrum detection, applied in electrical components, wireless communication, network planning, etc., to achieve the effects of ensuring stability, improving spectrum sensing performance, and reducing implementation complexity

Active Publication Date: 2018-03-20
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as we know, there is no literature considering the spectrum sensing problem of licensed users in the above dynamic mobile scenarios, and there are few algorithms that can solve the above joint estimation and detection problems at the same time

Method used

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  • A kind of mobile authorized user spectrum detection and its geographic location estimation method and device
  • A kind of mobile authorized user spectrum detection and its geographic location estimation method and device
  • A kind of mobile authorized user spectrum detection and its geographic location estimation method and device

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Embodiment Construction

[0025] The dynamic space model (DSM) of the authorized user position estimation scheme in the mobile CR scene designed by the present invention adopts the stochastic finite set theory, designs a three-stage Bernoulli filter algorithm, and adopts the particle filter technology to realize the authorized user's working state and Joint estimation of location information. The relevant methods and theories are described below.

[0026] 1. Dynamic Space Model (DSM)

[0027] The DSM model that the present invention proposes is as follows:

[0028] the s n =F(s n-1 ) (1)

[0029]

[0030]

[0031] Among them, formulas (1) and (2) are two dynamic equations, s n Indicates the working status of the authorized user at the nth moment, Indicates the location information of the authorized user at the nth moment and the speed information at the n-1 moment, wv n Indicates the superimposed interference from the speed change at the n moment to the next moment, obeys the Gaussian dis...

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Abstract

The invention provides a combined spectrum sensing and authorized user position estimating scheme for solving the problem of mobile authorized user spectrum sensing and mobile authorized user geographic position information estimating. A self-adaptation view expanding method is provided for the first time, the negative effect caused by the nondeterminacy and silence state of the authorized user position is effectively solved, and the spectrum sensing performance is improved. A brand new dynamic state-space model is established based on Bernoulli random finite sets and a Bayes sequential estimation frame, a three-section type Bernoulli smoothing mechanism is designed, the mobile authorized user geographic position is estimated while the authorized user working state is detected, and accordingly the spectrum sensing performance is obviously improved. Meanwhile, spectrum multiplexing of time, frequency and space is achieved, and accordingly the following spectrum resource allocation is further optimized.

Description

technical field [0001] Aiming at the spectrum detection problem of Cognitive Radio (CR) authorized users in mobile scenarios, the present invention designs a brand-new joint estimation method and device for the working state of authorized users and their geographic location information. While detecting the working status of authorized users, the new scheme fully considers the dynamic energy attenuation caused by their location movement, and then incorporates the location information of unknown authorized users into the estimation process to establish a dynamic model that includes the working status of authorized users and their locations. Space model (Dynamic State-space Model, DSM). Based on the theory of random finite sets, the working status of authorized users and their dynamic location information are modeled as a Bernoulli Random Finite Sets (Bernoulli Random Finite Sets, BRFS), and a Bernoulli filtering mechanism adapted to it is designed. While sensing the working sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/10H04W64/00
CPCH04W16/10H04W16/14H04W64/00
Inventor 李斌赵成林南一江许方敏
Owner BEIJING UNIV OF POSTS & TELECOMM
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