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A Mixture Gaussian Spectrum Sensing Method Based on Block Sparsity

A technology of spectrum sensing and mixed Gaussian, which is applied in the field of wireless communication and can solve problems such as errors

Active Publication Date: 2021-01-19
XI AN JIAOTONG UNIV
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  • Description
  • Claims
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Problems solved by technology

[0004] Existing reconstruction algorithms for cognitive radio compressed spectrum sensing only study the system model affected by additive white Gaussian noise
However, many interferences or noises in real life are not purely additive Gaussian white noise, such as man-made impulse noise, channel interference between cognitive users, and ultra-wideband interference. If Gaussian distribution is still used to fit the will cause large errors

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  • A Mixture Gaussian Spectrum Sensing Method Based on Block Sparsity
  • A Mixture Gaussian Spectrum Sensing Method Based on Block Sparsity
  • A Mixture Gaussian Spectrum Sensing Method Based on Block Sparsity

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Embodiment Construction

[0093]The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, where the schematic embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0094] The hybrid Gaussian spectrum sensing method based on the block sparseness characteristic of the present invention comprises the following steps:

[0095] Step 1, build a block-sparse spectrum sensing system model affected by mixed Gaussian noise.

[0096] 1a) Since the geographic location of the primary user is unknown relative to the cognitive user, in order to facilitate the cognitive user to estimate the geographic location of the primary user, a virtual reference grid point scheme is introduced, thus transforming a non-convex optimization problem into a convex To optimize the solution problem, the virtual reference grid point map is as follows figure 1 shown.

[0097] 1b) Cons...

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Abstract

The invention discloses a mixed Gaussian spectrum sensing method based on block sparseness characteristics, which comprises the following steps: 1) Constructing a block sparse spectrum sensing system model affected by mixed Gaussian noise; 2) Exploring the primary user power according to the block sparse spectrum sensing system model The block sparse structure of the spectrum signal; 3) The block sparse structure of the primary user power spectrum signal is used to reconstruct the primary user power spectrum signal, and then determine whether the channel is occupied. Based on the virtual reference grid point scheme, the present invention effectively explores the block sparse characteristic of the primary user power spectrum signal by introducing a priori variable that can control the block sparse structure, and then reconstructs the power spectrum information of the primary user signal. In addition, the present invention takes into account the influence of mixed Gaussian noise on the cognitive radio system, and can effectively reconstruct the primary user power spectrum signal without knowing the block sparse structure information of the primary user power spectrum signal in advance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a hybrid Gaussian spectrum sensing method based on block sparse characteristics. Background technique [0002] With the increasing number of wireless communication devices and users, spectrum resources have become a very important but increasingly scarce resource. However, the fact is that users with spectrum authorization do not make full use of limited spectrum resources no matter in time domain, frequency domain or air domain, and unlicensed spectrum resources are becoming less and less. Currently, one of the effective solutions is to use cognitive radio. Through spectrum sensing technology, cognitive users can dynamically use spectrum resources not used by primary users without causing harmful interference to primary users, thereby improving spectrum utilization. [0003] An important reason why cognitive users can perceive licensed spectrum throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/382H04W16/14H04W64/00H04W72/04
CPCH04B17/382H04W16/14H04W64/006H04W72/53Y02D30/70
Inventor 李锋赵茜茜
Owner XI AN JIAOTONG UNIV
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