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Continuous wave radar feed-through nulling system and method

A wave radar and leaked signal technology, applied in the new leaked signal suppression field, can solve the problems of complex elimination of equipment, difficulty in fast and accurate matching of leaked signals, etc., and achieve the effect of high suppression ratio, accurate measurement, and reduced requirements.

Active Publication Date: 2011-04-20
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0008] The above-mentioned CW radar leakage signal cancellation method has three disadvantages: a. The leakage signal cancellation is relatively low, up to about 50dB; b. The implementation of the cancellation equipment is relatively complicated; c.

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  • Continuous wave radar feed-through nulling system and method

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Embodiment Construction

[0030] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0031] Such as figure 1 Shown is the system block diagram of the continuous wave radar leakage signal cancellation system of the present invention, the leakage signal cancellation system of the present invention includes: a transmitting antenna, a receiving antenna, a transmitting channel, a receiving channel and a signal processor, and the transmitting antenna radiates the signal of the transmitting channel The receiving antenna receives the echo signal and the direct wave signal leaked from the transmitting antenna. The transmitting channel is composed of a filter amplification module, an up-conversion module and a power amplifier; the receiving channel is composed of a low-noise amplifier, a down-conversion module, and a filter amplification module. and a quadrature demodulation module; the signal processor includes an analog signal...

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Abstract

The invention provides a continuous wave radar feed-through nulling system and a continuous wave radar feed-through nulling method. The system comprises an antenna device, a transmitting channel, a receiving channel and a signal processor, wherein the antenna device consists of a transmitting antenna and a receiving antenna; the transmitting channel consists of a filter and amplifier module, an up-conversion module and a power amplifier; the receiving channel consists of a low-noise amplifier, a down-conversion module, a filter and amplifier module and a quadrature dDemodulation module; and the signal processor comprises an analog signal conditioning unit circuit and a digital signal processing unit circuit. In the invention, through the sampling of an orthogonally demodulated signal and the real-time self-adaptive nulling of the signal, feed-through signals are prohibited and the measurement accuracy of the system is improved. Meanwhile, the video nulling system provided by the invention also has the characteristics that: the scheme is simple; the implementation is easy; and the like.

Description

technical field [0001] The invention relates to a continuous wave radar leakage cancellation system and method, which is a video leakage signal cancellation technology for landing navigation continuous wave speed measuring radar, and is a new leakage signal suppression method. Background technique [0002] Microwave leakage cancellation technology is the main technology to solve the problem of isolation between the radar transmitter signal directly leaked to the receiver signal, that is, the transceiver isolation problem, and it is also necessary for almost all continuous wave radars with high requirements. The importance of microwave leakage cancellation technology lies not only in its ability to suppress microwave leakage signals, but also in its ability to ensure moderate dynamics of radar echo signals. [0003] The current leakage suppression technology to solve the isolation of continuous wave radar mainly includes radio frequency cancellation, intermediate frequency ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/36G01S13/89
Inventor 党红杏欧祥荣谭小敏王科韩涛牛文博孙嘉
Owner XIAN INSTITUE OF SPACE RADIO TECH
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