Radar receiving digital coherent processing system

A technology of coherent processing and digital reception, applied in the field of radar receiving digital coherent processing system, it can solve the problems of poor clutter suppression ability, complicated debugging, unstable operation of radar receiver coherent oscillator, etc., to increase stability and reliability , Improve the effect of clutter suppression capability

Active Publication Date: 2013-05-15
武汉华博防务科技有限公司
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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a radar receiving digital coherent processing system to solve the problems in the prior ar

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[0031] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0032] Such as figure 1 Shown is a structural diagram of the digital coherent processing system of the present invention, including a first amplification and level conversion module 1 for receiving directional input analog signals, and performing amplification processing and level conversion processing on the directional input analog signals, and Send the processed directional input signal to the dual-channel analog-to-digital converter; the second amplification and level conversion module 2 is used to receive the intermediate frequency echo analog signal, and to amplify and level the intermediate frequency echo analog signal Convert and process, and send the processed intermediate frequency echo analog signal to a dual-chann...

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Abstract

The invention relates to the field of radar reception, in particular to a radar receiving digital coherent processing system. The radar receiving digital coherent processing system comprises a first amplification and electrical level conversion module, a second amplification and electrical level conversion module, a two-channel analog-to-digital converter used for analog-to-digital conversion, a field programmable gate array (PFGA) coherent processing model used for coherent processing, a system clock, an interface electrical level conversion module, a two-channel analog-to-digital converter used for analog-to-digital conversion, a first amplifier, a second amplifier and a power supply transformation module used for supplying power to the system, wherein the first amplification and electrical level conversion module and the second amplification and electrical level conversion module are used for receiving and amplifying a conversion, and the first amplifier and the second amplifier are used for amplifying an output signal. A digital signal processing technology and intermediate frequency direct digitalization are used in the PFGA coherent processing model, a convolution operation is conducted through the transmission of a dominant wave signal and an intermediate frequency echo wave digital signal, the influences of an initial phase, frequency instability and amplitude instability of a transmitted signal are eliminated, digital frequency stabilization phase stabilization, self-adaptation frequency compensation and receiving coherent processing can be achieved, the stability and the reliability of the system can be improved, and the clutter wave suppression ability of the complete machine system can be enhanced.

Description

technical field [0001] The invention relates to the field of radar reception, in particular to a digital coherent processing system for radar reception. Background technique [0002] The radar receiver coherent oscillator with analog coherent oscillation technology is unstable, debugging is complicated, the cancellation effect is not ideal, and the clutter suppression ability of the whole system is poor. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a radar receiving digital coherent processing system to solve the problems in the prior art that the coherent oscillator of the radar receiver is unstable, debugging is complicated, the cancellation effect is not ideal and the clutter suppression ability is poor. [0004] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a radar receiving digital coherent processing system, including a first amplification ...

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Application Information

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IPC IPC(8): G01S7/288G01S7/36
Inventor 徐洪春王递进
Owner 武汉华博防务科技有限公司
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