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A DCS signal reconstruction method for LEO system with priority on energy efficiency and delay tolerance

A technology of signal reconstruction and delay tolerance, which is used in transmission systems, relay system monitoring, wireless communication, etc.

Active Publication Date: 2020-05-05
东开数科(山东)产业园有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the Lasso method to reconstruct the noisy signal must be based on the known signal sparsity

Method used

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  • A DCS signal reconstruction method for LEO system with priority on energy efficiency and delay tolerance
  • A DCS signal reconstruction method for LEO system with priority on energy efficiency and delay tolerance
  • A DCS signal reconstruction method for LEO system with priority on energy efficiency and delay tolerance

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Embodiment Construction

[0140] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0141] figure 1 Reconstruction of scene graphs for DCS-based signals for L-CR systems. It can be seen from the figure that in the LEO micro-satellite cognitive radio (L-CR) system, multiple satellites are used as nodes with cognitive functions, and the multi-nodes perceive, transmit and process the information transmitted by the ground gateway through distributed networking. In this system, the primary user (PU) node of the licensed frequency band receives the signal sent by the ground gateway station, and the LEO satellite cognitive user (CR1, CR2) satellite node opportunistically uses the primary user spectrum to perceive the signal of the ground gateway station The information is sent to the ground aggregation node, which integrates the sensing information of multiple LEO satellites for post-processing, and uses the convex relaxation method for sig...

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Abstract

The invention discloses an LEO system DCS signal reconstruction method achieving energy efficiency priority delay tolerance. The method comprises the following steps that 1, a time-varying LEO satellite perception channel model is built; 2, a distributed compressive sensing joint sparsity model is built; 3, signal reconstruction and spectrum detection based on DCS comprises a signal reconstruction stage and a spectrum detection stage; 4, DCS signal reconstruction and detection energy consumption under the condition of a lower signal-to-noise ratio is calculated; 5, a DCS perception signal reconstruction energy consumption optimization scheme under the delay tolerance condition is determined. According to the LEO system DCS signal reconstruction method achieving energy efficiency priority delay tolerance, a good reconstruction property is achieved under the conditions of the low signal-to-noise ratio and low compression ratio, and the reconstruction complexity is obviously reduced when effective judgment is conducted on an LEO spectrum. Meanwhile, for energy efficiency of an L-CR system, the energy consumption of the two methods in signal reconstruction and spectrum detection stage is taken into account, and weighted energy consumption functions of the two stages are constructed.

Description

technical field [0001] The invention belongs to the technical field of information and communication engineering, and relates to a DCS signal reconstruction method with energy efficiency priority and delay tolerance. Especially in LEO cognitive radio systems. The present invention relates to low earth orbit satellite (Low Earth Orbit, LEO) communication theory and cognitive radio (Cognitive Radio, CR) technology in wireless communication system, distributed compressed sensing (Distributed Compressive Sensing, DCS) theory and signal processing in signal processing The Least angle regression (Lars) method in the reconstruction method is specifically a DCS signal reconstruction method with energy efficiency priority and delay tolerance in the LEO cognitive radio system. Background technique [0002] Low Earth Orbit (LEO) satellites are located at a distance of (500-2000) km from the ground, and have the characteristics of satellite channels and mobile channels, such as propaga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04B17/40H04B17/391
CPCH04B17/391H04B17/40H04W16/14Y02D30/70
Inventor 胡慧许晓荣章坚武
Owner 东开数科(山东)产业园有限公司
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