Self-adaptive time domain equalization system and in-band full-duplex wireless communication system

A wireless communication system and time-domain equalization technology, applied in the field of microwave photonics and wireless communication, to achieve good rejection ratio, increase system complexity, and low device cost

Inactive Publication Date: 2018-09-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention uses adaptive time domain equalization to solve the problem of multi-path self-interference channel, so as to widen the bandwidth eliminated by optical self...

Method used

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  • Self-adaptive time domain equalization system and in-band full-duplex wireless communication system
  • Self-adaptive time domain equalization system and in-band full-duplex wireless communication system
  • Self-adaptive time domain equalization system and in-band full-duplex wireless communication system

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Embodiment 1

[0044] This embodiment provides an adaptive time-domain equalization system for multi-path self-interference channels in an optical self-interference cancellation system, including: an optical self-interference cancellation module, an adaptive time-domain equalization module, and a control module; wherein:

[0045] The adaptive time-domain equalization module performs adaptive training and adjustment on a reference signal, and the reference signal refers to a copied local baseband transmission signal;

[0046] The optical self-interference cancellation module receives a mixed signal and a reference signal formed by a multi-path self-interference signal generated after another local baseband transmission signal in the baseband transmission signal passes through a multipath channel and a useful signal sent by the transmitting antenna of the other communication unit, Elimination of self-interference signals is achieved through precise matching of reference signals, and useful rece...

Embodiment 2

[0057] This embodiment provides an in-band full-duplex wireless communication system, including a digital signal processing baseband unit, a radio frequency unit, a control unit, and an adaptive time-domain multi-path self-interference channel in the optical self-interference cancellation system provided in Embodiment 1 Equilibrium systems; where:

[0058] The adaptive time domain equalization module is set in the digital signal processing baseband unit;

[0059] The optical self-interference cancellation module is arranged in the radio frequency unit;

[0060] The control module is set in the control unit.

[0061] Preferably, the radio frequency unit also includes a plurality of mixers and electric power amplifiers, the baseband transmission signal passes through the mixers and the electric power amplifiers in sequence, and then passes through the multipath channel to generate a multipath self-interference signal, and inputs the useful signal to the optical An interference...

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Abstract

The invention provides a self-adaptive time domain equalization system for a multi-path self-interference channel in an optical self-interference cancellation system. A self-adaptive time domain equalization module is used for carrying out self-adaptive training adjustment on a reference signal; an optical self-interference cancellation module is used for receiving a mixed signal and the referencesignal, realizing cancellation of a self-interference signal, and outputting an optical signal; and a control module is used for controlling reception of the optical signal and state switching of theself-adaptive training of the optical signal in a process of carrying out self-adaptive training adjustment on the reference signal by the self-adaptive time domain equalization module. Meanwhile, the invention provides an in-band full-duplex wireless communication system. Through the self-adaptive time domain equalization system, a problem that the suppressing bandwidth is severely reduced due to the multi-path self-interference channel is solved, the bandwidth of a passband can be expanded, and a better self-interference suppression ratio can be obtained in the selected passband.

Description

technical field [0001] The invention relates to the technical field of microwave photonics and wireless communication, in particular to an adaptive time-domain equalization system for multi-path self-interference channels in an optical self-interference elimination system and an in-band full-duplex wireless communication system. Background technique [0002] With the development of the fifth-generation mobile communication technology (5G), wireless communication systems require higher transmission rates and wider transmission bandwidths, but limited spectrum resources restrict these requirements. Commonly used methods to increase the wireless transmission rate are to increase spectral efficiency, increase available bandwidth, and develop new frequency bands with higher frequencies. However, these methods will increase system costs to a certain extent, and cannot well solve the problem of insufficient spectrum resources. In-band full-duplex technology has become a candidate f...

Claims

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Application Information

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IPC IPC(8): H04B10/69H04L5/14
CPCH04B10/697H04B10/6971H04L5/14
Inventor 郑立卓张云昊肖石林黄麟
Owner SHANGHAI JIAO TONG UNIV
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