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Phase-adjustable radio frequency cancellation device based on DPMZM and cancellation method thereof

A radio frequency device and phase technology, which is applied in the field of DPMZM-based phase-adjustable radio frequency cancellation devices, can solve the problems of self-interference suppression in full-duplex systems, and achieve the effects of self-interference elimination, cancellation depth improvement, and high tuning accuracy

Inactive Publication Date: 2019-01-22
NO 8511 RES INST OF CASIC
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Problems solved by technology

[0005] The purpose of the present invention is to provide a DPMZM-based phase-adjustable radio frequency cancellation device and its cancellation method, which solves the problem of suppressing self-interference in a full-duplex system

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  • Phase-adjustable radio frequency cancellation device based on DPMZM and cancellation method thereof
  • Phase-adjustable radio frequency cancellation device based on DPMZM and cancellation method thereof
  • Phase-adjustable radio frequency cancellation device based on DPMZM and cancellation method thereof

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] The invention provides a DPMZM-based phase-adjustable radio frequency cancellation device and its cancellation method. Compared with the general anti-jamming system, the invention can compensate the phase error of the broadband signal and realize the phase cancellation of the signal and the interference signal. The premise of a difference of 180 degrees, and then use the adjustable optical attenuator to match the amplitude of the signals, the dispersion compensation module to match the delay between the signals, and finally eliminate the radio frequency interference signal by the balanced photodetector. The microwave photonic phase shifter is composed of a dual parallel Mach-Zehnder modulator and an optical bandpass filter. The dual parallel Mach-Zehnder modulator can not only modulate the radio frequency signal onto the optical carrier, but also realiz...

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Abstract

The invention discloses a phase-adjustable radio frequency cancellation device based on DPMZM and a cancellation method thereof;a microwave photonic phase shifter based on DPMZM is used to compensatethe phase error caused by the reflection of the jamming signal passing through the interface formed by different loss materials, and the jamming signal cancellation is realized by balancing the photodetector, so as to improve the cancellation depth of the system and the signal cancellation in large frequency range. At the same time, the delay error is compensated by the dispersion compensation module, and the amplitude error is compensated by the adjustable optical attenuator.

Description

technical field [0001] The invention belongs to microwave photon anti-jamming technology, in particular to a DPMZM-based phase-adjustable radio frequency cancellation device and a cancellation method thereof. Background technique [0002] In the field of wireless communication, in order to solve the problem of spectrum scarcity, you can choose to increase the utilization of spectrum resources. Simultaneous same-frequency full-duplex technology uses the same time period and the same frequency band to transmit and receive wireless signals at the same time, which doubles the frequency band efficiency of the wireless communication link. In view of its advantages of efficient use of spectrum resources, saving time resources, and avoiding signal loss, co-frequency technology has become an important transmission scheme of wireless communication technology. However, the same-frequency full-duplex technology faces the challenge of how to obtain sufficient transceiver isolation. Bec...

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Application Information

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IPC IPC(8): H04B1/525H04B10/40
CPCH04B1/525H04B10/40
Inventor 李贵显冀贞海侯文栋杨树树刘志武徐学华
Owner NO 8511 RES INST OF CASIC
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