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Hybrid Gaussian spectrum sensing method based on block sparsity characteristics

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

Active Publication Date: 2018-11-23
XI AN JIAOTONG UNIV
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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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  • Hybrid Gaussian spectrum sensing method based on block sparsity characteristics
  • Hybrid Gaussian spectrum sensing method based on block sparsity characteristics
  • Hybrid Gaussian spectrum sensing method based on block sparsity characteristics

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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 hybrid Gaussian spectrum sensing method based on block sparsity characteristics. The method comprises the following steps: 1) constructing a block sparse spectrum sensing system model influenced by hybrid Gaussian noise; 2) exploring a block sparse structure of a main user power spectrum signal according to the block sparse spectrum sensing system model; 3) reconstructingthe main user power spectrum signal by using the block sparse structure of the main user power spectrum signal, thereby judging whether the channel is occupied or not. The hybrid Gaussian spectrum sensing method disclosed by the invention is based on a virtual reference grid point scheme, and the block sparsity characteristics of the main user power spectrum signal are explored by importing a prior variable capable of controlling the block sparse structure so as to reconstruct the power spectrum information of the main user signal. In addition, in the hybrid Gaussian spectrum sensing method disclosed by the invention, the influence of the hybrid Gaussian noise on a cognitive radio system is considered, and the main user power spectrum signal can be reconstructed effectively without knowing the information of the block sparse structure of the main 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 Applications(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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