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Simultaneous and same-frequency full-duplex single-antenna relay system based on fractal microstrip coupler group

A co-frequency full-duplex, fractal microstrip technology, used in transmission systems, duplex signal operations, electrical components and other directions, can solve the complex process of circuit impedance matching and phase elimination, self-interference elimination microstrip circuit is difficult to design, the overall The system occupies a large area and other problems, so as to achieve the effect of improving the self-interference elimination ability, the self-interference elimination ability and the small size.

Active Publication Date: 2021-05-18
XIDIAN UNIV
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AI Technical Summary

Problems solved by technology

The following begins to describe the existing technology and its shortcomings: the existing technology uses a separate directional antenna for transceiver isolation to reduce the impact of self-interference signals on the received signal, the distance between the transceiver antennas is relatively long, and the overall system occupies a large area , poor mobility
Ferrite circulator packages are generally relatively large in size, which is not conducive to integrated design
[0006] (3) The existing single-antenna full-duplex system has relatively low transceiver isolation and poor self-interference cancellation capability
[0008] The traditional single-antenna transceiver isolation system is mostly implemented using a ferrite circulator, but it is difficult to design a wide-band, highly integrated new self-interference cancellation microstrip circuit
The impedance matching and phase cancellation process of the circuit is relatively complex, which is a challenge for the designer

Method used

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  • Simultaneous and same-frequency full-duplex single-antenna relay system based on fractal microstrip coupler group
  • Simultaneous and same-frequency full-duplex single-antenna relay system based on fractal microstrip coupler group
  • Simultaneous and same-frequency full-duplex single-antenna relay system based on fractal microstrip coupler group

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Embodiment Construction

[0031]In order to make the objectives, technical solutions and advantages of the present invention, the present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely intended to illustrate the invention and are not intended to limit the invention.

[0032]For the problems of the prior art, the simultaneous frequency-based system-based system-based all-duplex single antenna relay system includes: a single antenna structure; a fractal microstrip coupler group for eliminating self-interference signals; Analog domain consisting of a powerfinder, phase shot, an adjustment, a synthesizer; a controlled relay amplification module composed of a CNC amplifier. The present invention constructs the same frequency full-dupleer self-interference cancellation system from antenna domain to the analog domain, and utilizes a fractal microstrip coupler group to increase the ability of simult...

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Abstract

The present invention belongs to the field of radio transmission technology. It is disclosed that a fractal micr -band coupling group is disclosed at the same time.Port; Form -shaped microcoupler group includes three 50 ohm ports: antenna end, sending end and receiving end; simulation domain self -interference to eliminate module, use the exercise scorer to copy a transmitting signalAfter the reverse self -interference signal, the synthesizer is converged to the receiving signal to eliminate self -interference; the CNC amplifier module is used to adjust the amplifier coefficient of the large relay amplifier in real time through the digital signal;Calculate the magnifying factors based on the maximum signal -to -noise ratio and adjust the magnifying factors.The relay system of the present invention can not only widen the scope of communication, greatly enhance the system capacity, but also work in the full dual -work mode, which greatly saves spectrum resources and improves spectrum efficiency.

Description

Technical field[0001]The present invention belongs to the field of radio transmission technology, and more particularly to a fractal microstrip coupler group, while the same frequency full-duplex single antenna relay system is used.Background technique[0002]Currently, the closest prior art: In the field of wireless communication, with the rapid development of information technology, communication and data transmission services have rapidly increase, so that electromagnetic wave communication spectrum resources are increasingly crowded. In this context, full-duplex communication technology has been widely used and has become one of the key technologies in the field of wireless communications. Compared with the half-duplex relay system, the full-duplex relay communication system can simultaneously send and receive simultaneously, multiplier spectral efficiency and greatly enhance system capacity, thereby alleviating the status quo of spectrum resource tight. However, due to the charac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/525H04L5/14
CPCH04B1/525H04L5/14
Inventor 刘毅杨普喻丹阳申逸飞南海涵张海林
Owner XIDIAN UNIV
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