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A multi-channel energy-efficient spectrum sensing method based on sensing performance

A spectrum sensing and multi-channel technology, which is applied in the field of multi-channel energy-efficient spectrum sensing based on sensing performance, can solve the problems of not considering the sensing performance requirements, not considering multiple channel broadband energy efficiency sensing, and only considering single channel energy efficiency sensing technology, etc. , to achieve the effect of small perceived energy consumption

Active Publication Date: 2021-03-05
NAT UNIV OF DEFENSE TECH
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AI Technical Summary

Problems solved by technology

However, most of the existing algorithms use a certain sensing strategy to reduce the sensing energy consumption, without considering the sensing performance requirements, such as the impact of detection probability, false alarm probability and other requirements on sensing energy consumption; or only considering the energy efficiency sensing technology of a single channel , does not consider the broadband energy efficiency perception under multiple channels

Method used

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  • A multi-channel energy-efficient spectrum sensing method based on sensing performance
  • A multi-channel energy-efficient spectrum sensing method based on sensing performance
  • A multi-channel energy-efficient spectrum sensing method based on sensing performance

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specific Embodiment approach

[0017] 1. Establish a binary hypothesis model for cognitive radio spectrum sensing.

[0018] According to whether the channel is occupied by the primary user, each channel has two states, that is, idle state and busy state, so the perception problem can be expressed as the following binary hypothesis:

[0019]

[0020] where H 0 Indicates that the channel is idle; H 1 Indicates that the channel is occupied by the primary user; w(n) represents independent and identically distributed zero-mean additive white Gaussian noise, and its variance is h(n) represents the channel gain; s(n) represents the primary user signal.

[0021] 2. Deduce the relationship between the perceived energy consumption and the perceived time required for the user to transmit a data packet next time under multi-channel conditions.

[0022] According to the relevant theory of energy detection, the detection probability of the secondary user to the primary user on a certain channel can be expressed as...

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Abstract

The invention relates to a sensing performance-based multi-channel energy efficiency spectrum sensing method. Firstly, the cognitive radio spectrum sensing binary hypothesis model is established; then, the relationship between the total perceived energy consumption and the perceived time required by cognitive radio users to transmit a data packet under multi-channel conditions is deduced; finally, the required perceived performance ( Target detection probability, target false alarm probability) are used as constraints to calculate the minimum perceptual energy consumption required to transmit a data packet under multi-channel conditions. The present invention provides the shortest sensing time and the minimum sensing energy consumption under multi-channel conditions from the perspective of meeting the sensing performance requirements.

Description

[0001] a technical field [0002] The invention relates to a cognitive radio spectrum sensing technology, in particular to a multi-channel energy-efficient spectrum sensing method based on sensing performance. [0003] Two background technology [0004] Spectrum sensing is one of the key technologies in cognitive radio. Its goal is to detect spectrum holes accurately and quickly, so as to provide a basis for secondary users to use spectrum efficiently without interfering with primary users. Usually, the performance of spectrum sensing is represented by detection probability and false alarm probability. The higher the detection probability, the better the primary user can be protected. The lower the false alarm probability, the more chances a channel is used by secondary users. In addition, in today's pursuit of green communication, cognitive radio also needs to consider energy consumption. Among them, the energy consumption of spectrum sensing is an important part of cogniti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/382
Inventor 牛英滔李微宋晓勤许拔
Owner NAT UNIV OF DEFENSE TECH
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