Frequency stepping signal speed compensation system based on difference frequency double waveforms

A technology of frequency stepping and signal speed, which is applied in radio wave measurement system, radio wave reflection/reradiation, utilization of reradiation, etc., can solve the problems of poor engineering realization, achieve less conditional constraints, high compensation accuracy, and engineering Realizable effect

Active Publication Date: 2018-06-29
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 freq

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  • Frequency stepping signal speed compensation system based on difference frequency double waveforms

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[0014] A frequency stepping signal speed compensation system based on dual waveforms of difference frequency, 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, 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 divider 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 The...

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Abstract

The invention discloses a frequency stepping signal speed compensation system based on difference frequency double waveforms. The frequency stepping signal speed compensation system comprises a difference frequency dual-waveband signal generating unit (2), a broadband antenna feed system (3), a difference frequency dual-waveband signal receiving unit (4), a frequency source (5) and a signal processor (6); the difference frequency dual-waveband signal generating unit (2) transmits a difference frequency dual-waveband signal; the difference frequency dual-waveband signal receiving unit (4) receives an echo signal; the signal processor (6) implements speed compensation. The frequency stepping signal speed compensation system disclosed by the invention can solve the problem of poor engineeringrealizability of the conventional stepping frequency signal speed measurement method, is realized through hardware design and is less in condition constrain, strong in engineering realizability and high in 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 a difference frequency double waveform. Background technique [0002] Using stepped frequency signals is a method for radar systems to achieve high range resolution. Because of its large time-wide bandwidth and narrow instantaneous bandwidth, it is easy to implement in engineering, so it has received extensive attention in recent years. However, since the data rate of the stepped frequency signal is low and it is a Doppler sensitive signal, the target speed has a great influence on the imaging quality of the stepped frequency radar. Among them, the primary phase term of velocity will cause the range profile to move and cause ranging errors; while the secondary phase term will cause the range profile waveform broadening, energy divergence, loss of signal-to-noise ratio, and imaging distortion. Therefore, sp...

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Application Information

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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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