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Signal processing method and device

A signal processing and signal technology, applied in the field of communication

Active Publication Date: 2021-04-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the advancement of technology, the accuracy of velocity matching and defuzzification of signals acquired in SIMO+MIMO mode is still facing challenges.

Method used

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Embodiment Construction

[0038] The technical solution in this application will be described below with reference to the accompanying drawings.

[0039] figure 1 is a schematic diagram of a radar detection system 100 according to an embodiment of the present application. The radar detection system 100 can work in SIMO mode or in MIMO mode. Such as figure 1 As shown, the radar detection system 100 includes a transmitter 110 , a receiver 120 and a processing unit 130 . Wherein, the transmitter 110 may include Nt transmit antennas, and each transmit antenna corresponds to a transmit channel. The receiver 120 includes Nr receiving antennas, and each receiving antenna corresponds to a receiving channel. Nt transmitting antennas and Nr receiving antennas may form a MIMO antenna array.

[0040] When the radar detection system 100 works in MIMO mode, at least two of the Nt transmit channels can be used to transmit signals to the target, and at least two of the Nr receive channels can be used to receive t...

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Abstract

The invention provides a signal processing method and device, and the method and device can improve the speed matching ambiguity resolution precision of a signal under an SIMO+MIMO mechanism of a radar. The method comprises the following steps: acquiring Nr1*M1 signals, wherein the Nr1*M1 signals are echo signals of M1 signals sent to a target by a radar in an SIMO mode; obtaining Nt*Nr2*M2 signals, wherein the Nt*Nr2*M2 signals are echo signals of M2 signals sent to a target by the radar in an MIMO mode; performing first signal processing on the Nr1*M1 signals to obtain first processing data, the first signal processing including distance FFT analysis, linear prediction and Doppler FFT analysis in sequence; performing second signal processing on the Nt*Nr2*M2 signals to obtain second processing data, the second signal processing including distance FFT analysis and Doppler FFT analysis; and according to the first processing data and the second processing data, carrying out speed matching ambiguity resolution processing.

Description

technical field [0001] The present application relates to the communication field, in particular to a signal processing method and device. Background technique [0002] Radar detection is widely used in various fields, for example, an advanced driver assistant system (advanced driver assistant system, ADAS), an unmanned driving field, and the like. With the development of technology, there is a demand for higher distance resolution and higher angular resolution for radar detection. [0003] Radar can improve range resolution by transmitting a larger bandwidth, and achieve higher angular resolution by setting more multiple input multiple output (MIMO) arrays. A radar provided with a MIMO array may be referred to as a MIMO radar. MIMO radar can support a large number of transmitting antennas to transmit in turn, but because MIMO radar uses antennas to transmit in turn, the relative pulse repetition interval (PRI) of its single antenna is longer, which reduces the detection o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/58
CPCG01S13/58G01S7/2883G01S7/356G01S13/42G01S13/343G01S13/26G01S13/582G01S13/584
Inventor 朱金台劳大鹏李德建刘劲楠王犇
Owner HUAWEI TECH CO LTD