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A frequency step signal speed compensation system based on difference frequency double waveform

A waveform signal and frequency stepping technology, which is applied in radio wave measurement systems, radio wave reflection/re-radiation, instruments, etc., can solve problems such as poor engineering realization

Active Publication Date: 2021-06-15
BEIJING INST OF REMOTE SENSING EQUIP
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Problems solved by technology

[0004] The purpose of the present invention is to provide a frequency step signal speed compensation system based on difference frequency dual waveforms to solve the problem of poor engineering realization of existing step frequency signal speed measurement methods

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  • A frequency step signal speed compensation system based on difference frequency double waveform

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Embodiment Construction

[0014] A frequency step signal speed compensation system based on difference frequency dual waveforms, including: difference frequency dual-band signal generating unit 2, broadband antenna feeder system 3, difference frequency dual-band signal receiving unit 4, frequency source 5, and signal processor 6 . Wherein, the difference-frequency dual-band signal generating unit 2 includes: a digital frequency generator 1, an up-conversion channel A7, an up-conversion channel B8, and a synthesizer 9; wherein, the difference-frequency dual-band signal receiving unit 4 includes: Power splitter 10, down conversion channel A11, down conversion channel B12.

[0015] The output port a of the digital frequency generator 1 is connected to the input port a of the up-conversion channel A7, the output port b of the digital frequency generator 1 is connected to the input port a of the up-conversion channel B8, and the output port a of the up-conversion channel A7 is connected to the synthesis Th...

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Abstract

The invention discloses a frequency step signal speed compensation system based on a difference frequency dual waveform, comprising: a difference frequency dual-band signal generating unit (2), a broadband antenna feed system (3), and a difference frequency dual-band signal receiving unit (4 ), a frequency source (5) and a signal processor (6); the difference-frequency dual-band signal generation unit (2) transmits a difference-frequency dual-waveform signal, and the difference-frequency dual-band signal receiving unit (4) receives an echo signal, and the signal processor (6) Complete the speed compensation. The invention can solve the problem of poor engineering realizability of the existing step frequency signal speed measurement method, is realized through hardware design, is less constrained by conditions, has strong engineering realizability and high compensation precision.

Description

technical field [0001] The invention relates to a frequency step signal speed compensation system, in particular to a frequency step signal speed compensation system based on difference frequency double waveforms. Background technique [0002] Using frequency stepping signal is a method for radar system to achieve high range resolution. Because of its large temporal bandwidth and narrow instantaneous bandwidth, it is easy to implement in engineering, so it has received extensive attention in recent years. But because the data rate of the frequency stepping signal is low, it is a Doppler sensitive signal, so the target speed has a great influence on the imaging quality of the frequency stepping radar. Among them, the velocity primary phase term will cause the range image to move, causing ranging errors; and the secondary phase item will cause the waveform of the range image to broaden, energy divergence, signal-to-noise ratio loss, and imaging distortion. Therefore, speed c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/10G01S13/58G01S7/28
CPCG01S7/28G01S13/106G01S13/582
Inventor 毕波
Owner BEIJING INST OF REMOTE SENSING EQUIP
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