Radar refinement ranging method

A ranging method and radar technology, which are applied in measurement devices, radio wave measurement systems, and radio wave reflection/re-radiation, etc., can solve the problems of difficulty in data transmission rate, rough signal processing process, and increased cost of radar systems. , to achieve the effect of low sampling rate, meeting data transmission requirements, and small amount of data

CN109581347AActive Publication Date: 2019-04-05JINGZHOU NANHU MACHINERY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-04-05

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Abstract

The invention relates to a radar refinement ranging method, and belongs to the technical field of radar signal processing. The ranging signal processing flow of the method comprises the following steps: radio frequency sampling, mixing and filtering, low-sampling frequency re-sampling, speed measurement and distance compensation, pulse pressure and interpolation, filtering and distance compensation. Under the premise of not improving the waveform design difficulty and higher hardware design requirements, the data transmission rate is high, the distance measurement accuracy is improved, the radar working performance is improved, and the radar production cost is reduced. The method solves the problems that the existing ranging mode is only used for sampling once, resulting in large samplingdata amount, increased waveform design difficulty when the signal bandwidth is increased, increased data amount, and difficult requirement meeting of the data transmission rate, and that the signal processing is rough, and if requiring increased signal bandwidth, improved data transmission rate and ranging accuracy, higher standard waveform design and hardware design support are requested, and higher requirements for corresponding sampling and data processing chips are also requested, resulting in difficulty in design and fabrication, and increased equipment cost.
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Description

technical field

[0001] The invention relates to a radar refined ranging method, which belongs to the technical field of radar signal processing. Background technique

[0002] Signal processing is one of the core technologies of modern radar systems, and ranging is an important part of signal processing. The quality of ranging directly affects the accuracy of radar detection target distance. An important parameter to measure and reflect the radar detection distance accuracy is the distance resolution,

[0003] The distance resolution formula is as follows:

[0004]

[0005] In the formula, B Indicates the bandwidth; T e Indicates the transmitted pulse width or the equivalent pulse width after pulse compression; c is the electromagnetic wave propagation speed; visible, pulse width T e The narrower, that is, the frequency modulation bandwidth of the transmitted signal B The wider the distance resolution DR Also higher. However in T e Under the same pulse width co...

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Embodiment Construction

[0039] Below in conjunction with accompanying drawing, the embodiment of this radar refinement ranging method is described in further detail: (see Figure 1~5 ):

[0040]The design idea of ​​the present invention is: aiming at the deficiencies of the existing traditional ranging technology, in order to obtain higher ranging accuracy and higher distance resolution, the present invention improves the radar signal processing technology; the present invention includes two Sampling, and added interpolation, filtering and distance compensation processes in the signal processing process; the present invention samples the radio frequency signal with a high sampling frequency; the sampling signal and the local oscillator signal are mixed and filtered to obtain the baseband signal; The sampling frequency re-samples the generated baseband signal, that is, signal extraction; considering that the detection target of the radar is usually a moving target, and the movement of the target will ...