Device and method for downsampling rate of radar signal
A radar signal and downsampling rate technology, applied in the radar field, can solve problems such as difficulty in downsampling rate, increase in radar transmission pulse frequency, complex radar system, etc., and achieve good consistency, lower sampling rate, and simplify the radar system.
Active Publication Date: 2020-02-21
INST OF ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology
However, since the echo signals of each sub-band are obtained by dividing different transmission pulses, on the one hand, it will bring about the influence of signal time variation factors, on the other hand, it will lead to an increase in the frequency of radar transmission pulses; in addition, technologies such as de-skewing reception are also involved
Therefore, there are problems in the prior art that it is difficult to realize the downsampling rate and the radar system is complicated.
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[0036]The disclosure provides a device and method for reducing the sampling rate of radar signals. By decomposing the radar transmission signal into sub-band signals, they are arranged in time into a group of pulse signals for transmission and reception through a single channel, and a low sampling rate is adopted for the received signal. Sampling works, and solves the problem of spectrum aliasing caused by low sampling rate sampling by solving the sampling signal processing, which has the advantages of convenience, flexibility and good consistency, effectively reduces the sampling rate of radar signals, and simplifies Radar system, reducing costs.
[0037] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0038] In a first exemplary embodiment of the present disclosure, an ...
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The invention discloses a radar signal sampling rate reducing device and method. The device comprises a radar signal generator, a radar transmitting-receiving system, a radar data sampler and a radarsignal resolver. The radar signal generator generates a group of detection signals coded in time and frequency; the radar transmitting-receiving system emits the detection signals generated by the radar signal generator and receives target echo signals; the radar data sampler samples data of the echo signals and converts analog signals into digital signals; and according to the emitted coded detection signals, the radar signal resolver recovers the digital signals into echo signals. The method and device can be realized needless of using a multichannel technology or increasing the pulse emission frequency, and have the advantages of being convenient to realize, flexible and highly consistent; and the sampling rate of the radar signals is reduced effectively, a radar system is simplified and the cost is reduced.
Description
technical field [0001] The disclosure belongs to the technical field of radar, and relates to a device and method for reducing the sampling rate of radar signals. Background technique [0002] Radar is a radio remote sensing detection device that obtains target information by transmitting detection signals and receiving target reflection signals. In radar detection, in order to improve the measurement accuracy, it is necessary to increase the frequency bandwidth of the detection signal, which leads to an increase in the technical difficulty of radar signal analog-to-digital conversion. Usually, the detection signal bandwidth for radar emission is f B , according to the Nyquist sampling theorem, its sampling frequency f s should be greater than 2 times f B , otherwise it will lead to spectral aliasing of the sampled signal, and the real signal cannot be accurately restored. For example, for a detection signal with a bandwidth of 1 GHz, the sampling frequency of the echo s...
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IPC IPC(8): G01S7/40G01S7/41
CPCG01S7/4052G01S7/41
Inventor 王岩飞李和平韩松
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI