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Hybrid spectrum sharing method for full-duplex cognitive system based on signal polarization

A cognitive system and hybrid technology, which is applied in the field of hybrid spectrum sharing of full-duplex cognitive systems based on signal polarization, can solve the problems of unsatisfactory interference performance and cognitive throughput performance of authorized users, and achieve improved cognitive performance. Knowing the throughput, avoiding collisions and spectrum waste, and overcoming the effect of spectrum utilization

Active Publication Date: 2019-03-01
NANJING UNIV OF FINANCE & ECONOMICS +1
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  • Abstract
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Problems solved by technology

For the full-duplex hybrid method, although it can be directly designed to use two kinds of cognitive transmission power for the presence and absence of licensed users, its interference performance and cognitive throughput performance for licensed users are not good. ideal

Method used

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  • Hybrid spectrum sharing method for full-duplex cognitive system based on signal polarization
  • Hybrid spectrum sharing method for full-duplex cognitive system based on signal polarization
  • Hybrid spectrum sharing method for full-duplex cognitive system based on signal polarization

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Embodiment Construction

[0035] Usually, when authorized users do not exist (the authorized frequency band is idle), the transmission polarization state of cognitive users is not restricted, because there is no mutual interference between authorized users and cognitive users at this time, so the receiving polarization state of cognitive users can be compared with The mode setting matches the sending polarization state. When the authorized user exists, the cognitive user’s transmission polarization state is limited to the interference to the authorized user, and the authorized user will cause interference to the cognitive user. On the other hand, it should be mismatched with the polarization state of the authorized user as much as possible to avoid interference.

[0036] In the present invention, the cognitive user performs spectrum detection and licensed signal parameter learning in the licensed frequency band, and can judge in real time whether the licensed user occupies the spectrum based on the res...

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Abstract

The present invention discloses a hybrid spectrum sharing method for full-duplex cognitive system based on signal polarization. Firstly, the method enables a cognitive radio user to continuously perform spectrum sensing, learn polarization parameters of an authorized user signal, and adjust polarization state of the cognitive user self to access a licensed frequency band accordingly. When the cognitive user detects that a target licensed band is occupied, the cognitive user transmits data using a polarization state that does not interfere with the authorized user; however, when the target licensed band is not occupied, the cognitive user transmits data using another polarization state that improves cognitive communication throughput capacity. The method not only can effectively resist theself-interference of full-duplex communication, but also can improve the throughput capacity of the cognitive communication and interference performance to the authorized user.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a hybrid spectrum sharing method for a full-duplex cognitive system based on signal polarization. Background technique [0002] Existing spectrum sharing technologies can be classified into half-duplex spectrum sharing and full-duplex spectrum sharing. Half-duplex spectrum sharing includes four types: Interweave, Underlay, Overlay, and hybrid, while full-duplex spectrum sharing only has three modes: Interweave, Underlay, and Overlay. The hybrid method combines the Interweave and Underlay methods, that is, when the authorized user does not exist, the cognitive user works in the Interweave mode and communicates directly; when the authorized user exists, the cognitive user works in the Underlay mode and adopts a more Low transmit power transmits data. For the full-duplex hybrid method, although it can be directly designed to use two kinds of cognitive tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04W12/06H04W24/02
CPCH04W12/06H04W16/14H04W24/02
Inventor 张璐伍之昂曹杰
Owner NANJING UNIV OF FINANCE & ECONOMICS
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