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Spectrum Sensing and Information Transmission Method with Energy Harvesting in Cognitive Wireless Networks

A technology for cognitive wireless network and information transmission, applied in transmission monitoring, transmission systems, electrical components, etc., can solve the problem of energy reduction in spectrum sensing, and achieve the effect of no need to replace, improve reliability, and prolong service life

Active Publication Date: 2021-03-05
HOHAI UNIV CHANGZHOU
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  • Description
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Problems solved by technology

[0004] However, if the RF signal energy transmitted by the primary user is allocated proportionally by the cognitive nodes and then spectrum sensing and energy collection are performed simultaneously, the energy used for spectrum sensing will be reduced because the power allocation ratio is less than 1.

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  • Spectrum Sensing and Information Transmission Method with Energy Harvesting in Cognitive Wireless Networks
  • Spectrum Sensing and Information Transmission Method with Energy Harvesting in Cognitive Wireless Networks
  • Spectrum Sensing and Information Transmission Method with Energy Harvesting in Cognitive Wireless Networks

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0026] like figure 1 As shown, the primary user transmitter PU T and receiver PU R In the primary user network, there is one cognitive user SU and N cognitive relays in the cognitive wireless network, denoted as {SR i |i=1,2,...,N}, where SU has the function of collecting space radio frequency signal energy, figure 2 is a time slot diagram, and the period of spectrum sensing and information transmission is T, which is divided into the primary user detection phase, the reporting phase and the data transmission phase in time order, and the time is τ respectively D T, τ R T and (1-τ D -τ R ) T, τ D and τ R are the overheads of detection primary user stage and report stage respectively, 0D...

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Abstract

The spectrum sensing and information transmission method with energy collection in the cognitive wireless network of the present invention, the cognitive user uses the signal from the main user transmitter to perform spectrum sensing and energy collection, and uses the collected energy for information transmission, and detects the main user In the user phase, the cognitive user and N cognitive relays jointly detect whether the primary user is occupying the spectrum. In the stage, according to the final decision result of spectrum sensing, cognitive users perform energy collection or information transmission. While obtaining high spectrum sensing performance, the present invention provides working energy for the cognitive user, prolongs the service life of the cognitive user, and reduces or does not need periodic battery replacement.

Description

technical field [0001] The invention relates to a spectrum sensing and information transmission method with energy collection in a cognitive wireless network, and belongs to the technical field of cognitive radio. Background technique [0002] Traditional wireless communication uses a fixed spectrum allocation method. The government allocates these resources to authorized users or serves a large geographical area for a long time, but the utilization rate of these authorized spectrum is very low. Cognitive radio (cognitive radio) can solve the contradiction between the increasing demand for spectrum and the scarcity and low utilization of spectrum. It allows an unlicensed user (Secondary User, also called a cognitive user) to access spectrum of an authorized user (Primary User, also called a primary user). Among them, the cognitive user uses the spectrum sensing technology to detect the use of spectrum by the primary user to find spectrum holes (spectrum holes) not used by t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/382H02J50/20
CPCH04B17/382H02J50/20
Inventor 高远何海霞邓志祥汤一彬
Owner HOHAI UNIV CHANGZHOU
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