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A full-duplex cognitive relay communication method with balanced spectrum efficiency and energy efficiency

A technology of energy efficiency and spectrum efficiency, applied in the field of cognitive radio

Active Publication Date: 2018-10-19
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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All sites are equipped with only one antenna

Method used

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  • A full-duplex cognitive relay communication method with balanced spectrum efficiency and energy efficiency
  • A full-duplex cognitive relay communication method with balanced spectrum efficiency and energy efficiency
  • A full-duplex cognitive relay communication method with balanced spectrum efficiency and energy efficiency

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Embodiment Construction

[0012] The following is a detailed description of the present invention in conjunction with the accompanying drawings and embodiments.

[0013] Such as figure 1 As shown, the authorized user transmitter PT sends a signal x to the receiver PR p (t), while the unauthorized user transmitter ST sends a signal x to the receiver SR s (t). The signals received by authorized user receiver PR, unlicensed user receiver SR and full-duplex relay node R are expressed as:

[0014]

[0015]

[0016]

[0017] Where: P p and P s are the transmitting powers of authorized user transmitter PT and unlicensed user transmitter ST respectively; x p (t) and x s (t) are the signals of the authorized user transmitter PT and the unlicensed user transmitter ST respectively, their mean value is 0, and the variance is normalized to 1; h p is the channel coefficient from authorized user transmitter PT to authorized user receiver PR, h sp is the channel coefficient from unlicensed user transm...

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Abstract

The invention discloses a spectral efficiency and energy efficiency balanced full-duplex recognition relay communication method. The method comprises that an emitter and receiver pair of an authorized user, an emitter and receiver pair of an unauthorized user and a full duplex relay unit are included; and the full duplex relay unit includes three relay communication modes, namely the mode of only assisting the authorized user, the mode only assisting the unauthorized user and the mode of assisting both the authorized user and the unauthorized user simultaneously, the optimal values of the energy efficiency are compared under the constraints of the spectral efficiency, and the relay communication mode corresponding to the optimal energy efficiency value is maximal is selected. The optimal relay communication mode is selected according to the optimal value of the energy efficiency, the spectral efficiency and the energy efficiency of the system are balanced, and the method is suitable for the frequency band shared heterogeneous network assisted by the full duplex relay of different priority nodes.

Description

technical field [0001] The present invention relates to the technical field of cognitive radio, in particular to a full-duplex cognitive relay communication method with spectrum efficiency and energy efficiency balanced. Background technique [0002] Cognitive relay networks have potential application value in the field of heterogeneous networks, where many different types of wireless nodes work in the same area and have different priorities. High-priority nodes are assigned authorized frequency bands, and low-priority nodes share the frequency bands of high-priority nodes, causing interference to high-priority nodes. In order to ensure that the SINR of high-priority nodes is higher than the threshold and improve the throughput of low-priority nodes, relays are introduced into heterogeneous networks. [0003] In addition to throughput and spectrum efficiency, energy efficiency, which measures the sustainable operation capability of wireless communication systems, has also b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04W52/34H04W52/46
CPCH04W16/14H04W52/34H04W52/46
Inventor 陈宏滨赵峰陈晶聂化芝姬四林许晓菲
Owner GUILIN UNIV OF ELECTRONIC TECH