阅读说明：本技术 一种信号处理方法、装置及系统 (Signal processing method, device and system ) 是由 朱杰作 袁书田 叶威 于 2020-04-24 设计创作，主要内容包括：本申请涉及一种信号处理方法、装置及系统,可以应用于雷达等传感器,适用于自动驾驶、智能驾驶或者智能传输等领域。目标装置接收来自检测装置的第一发射信号。目标装置生成第一回波信号,第一回波信号是基于对第一发射信号的部分反射信号进行调制产生的,且第一回波信号与第一发射信号存在第一多普勒频偏。第一回波信号用于确定检测装置和目标装置之间的距离。由于第一回波信号的多普勒频率与来自环境的回波信号的多普勒频率有所不同,因此检测装置能够根据多普勒频率区分出来自目标装置的第一回波信号,从而可以根据第一回波信号对该目标装置进行测距。(The application relates to a signal processing method, a signal processing device and a signal processing system, which can be applied to sensors such as radars and the like and are suitable for the fields of automatic driving, intelligent driving or intelligent transmission and the like. The target device receives the first transmission signal from the detection device. The target device generates a first echo signal, wherein the first echo signal is generated based on modulating a partially reflected signal of a first transmitted signal, and the first echo signal and the first transmitted signal have a first doppler frequency shift. The first echo signal is used to determine a distance between the detection device and the target device. Since the doppler frequency of the first echo signal is different from the doppler frequency of the echo signal from the environment, the detection device can distinguish the first echo signal from the target device according to the doppler frequency, so that the target device can be measured according to the first echo signal.)

A signal processing method, comprising:

receiving a first transmission signal from a detection device;

generating a first echo signal, wherein the first echo signal is generated based on modulating a partially reflected signal of the first transmitted signal, and the first echo signal and the first transmitted signal have a first Doppler frequency shift;

wherein the first echo signal is used to determine a distance between the detection device and a target device.

The method of claim 1, wherein a difference between a second doppler frequency corresponding to the first echo signal and the first doppler frequency offset is smaller than or equal to a first threshold, the first threshold corresponds to first information, the first information includes preset velocity information, and the second doppler frequency corresponds to a distance between the detection device and a target device.

The method of claim 1 or 2, wherein the speed of the target device is within a first speed range, wherein the first speed range is preset.

The method according to any one of claims 1 to 3, wherein generating the first echo signal comprises:

varying an impedance of an antenna of the target device to effect modulation of an amplitude of a partially reflected signal of the first transmitted signal;

and obtaining the first echo signal.

The method of any of claims 1-4, wherein the first Doppler shift is determined based on a first velocity, the first velocity being a velocity of an object moving at a highest velocity in an environment in which the target device is located.

A signal processing method, comprising:

transmitting a first transmission signal;

receiving a first echo signal from a target device, wherein the first echo signal is generated after a part of a reflection signal of the first transmission signal is modulated; the first echo signal corresponds to a second Doppler frequency relative to the first transmitting signal;

and determining the distance between the detection device and the target device according to the first echo signal.

The method of claim 6, wherein a difference between the second Doppler frequency and a first Doppler frequency offset corresponding to the first echo signal is smaller than or equal to a first threshold, wherein the first threshold corresponds to first information, and wherein the first information comprises preset velocity information.

The method of claim 6 or 7, wherein determining the distance between the detection device and the target device from the first echo signal comprises:

determining a difference frequency signal corresponding to the first echo signal;

and determining the distance between the detection device and the target device according to the difference frequency signal.

The method of claim 8, wherein determining the distance between the detection device and the target device based on the difference frequency signal comprises:

inputting the difference frequency signal into a range-doppler spectrum, the range-doppler spectrum being used to characterize the relationship between range, doppler frequency and signal energy;

determining a distance corresponding to a signal in a first frequency range in the range-doppler spectrum as a distance between the detection apparatus and the target apparatus, wherein the first frequency range is determined according to the first doppler frequency offset and the first threshold.

The method of any of claims 6 to 9, wherein the first doppler shift is determined based on a first velocity, the first velocity being a velocity of an object moving at a highest velocity in an environment in which the target device is located.

A target device, comprising:

the receiving and transmitting module is used for receiving a first transmission signal from the detection device;

a processing module, configured to generate a first echo signal, where the first echo signal is generated based on modulating a partially reflected signal of the first transmit signal, and there is a first doppler frequency offset between the first echo signal and the first transmit signal;

wherein the first echo signal is used to determine a distance between the detection device and the target device.

The target device of claim 11, wherein a difference between a second doppler frequency corresponding to the first echo signal and the first doppler frequency offset is smaller than or equal to a first threshold, the first threshold is determined according to first information, the first information includes preset velocity information, and the second doppler frequency corresponds to a distance between the detection device and the target device.

The target device of claim 11 or 12, wherein the speed of the target device is within a first speed range, wherein the first speed range is preset.

The target device of any one of claims 11 to 13, wherein the processing module is configured to generate the first echo signal by:

varying an impedance of an antenna of the target device to effect modulation of an amplitude of a partially reflected signal of the first transmitted signal;

and obtaining the first echo signal.

The target device of any of claims 11 to 14, wherein the first doppler shift is determined from a first velocity, the first velocity being a velocity of an object moving at a highest velocity in an environment in which the target device is located.

A detection device, comprising:

the receiving and transmitting module is used for transmitting a first transmission signal;

the transceiver module is further configured to receive a first echo signal from a target device, where the first echo signal is generated by modulating a partially reflected signal of the first transmit signal; the first echo signal corresponds to a second Doppler frequency relative to the first transmitting signal;

and the processing module is used for determining the distance between the detection device and the target device according to the first echo signal.

The apparatus of claim 16, wherein a difference between the second doppler frequency and a first doppler frequency offset corresponding to the first echo signal is smaller than or equal to a first threshold, wherein the first threshold corresponds to first information, and wherein the first information comprises preset velocity information.

The detection apparatus according to claim 16 or 17, wherein the processing module is configured to determine the distance between the detection apparatus and the target apparatus according to the first echo signal by:

determining a difference frequency signal corresponding to the first echo signal;

and determining the distance between the detection device and the target device according to the difference frequency signal.

The detection apparatus according to claim 18, wherein the processing module is configured to determine the distance between the detection apparatus and the target apparatus according to the difference frequency signal by:

inputting the difference frequency signal into a range-doppler spectrum, the range-doppler spectrum being used to characterize the relationship between range, doppler frequency and signal energy;

determining a distance corresponding to a signal in a first frequency range in the range-doppler spectrum as a distance between the detection apparatus and the target apparatus, wherein the first frequency range is determined according to the first doppler frequency offset and the first threshold.

The detection apparatus according to any one of claims 16 to 19, wherein the first doppler shift is determined according to a first velocity, and the first velocity is a velocity of an object having a highest velocity in an environment in which the target apparatus is located.

A computer-readable storage medium, characterized in that it stores a computer program which, when run on a computer, causes the computer to perform the method of any of claims 1-5, or causes the computer to perform the method of any of claims 6-10.

A detection system comprising a target device as claimed in any one of claims 11 to 15 and a detection device as claimed in any one of claims 16 to 20.

A chip comprising at least one processor and interface circuitry for providing signal transmission or reception for the at least one processor for implementing a method as claimed in any one of claims 1 to 5.

A chip comprising at least one processor and interface circuitry for providing signal transmission or reception for the at least one processor for implementing a method as claimed in any one of claims 6 to 10.