Doppler radar processing system

Abstract

This invention provides a Doppler radar processing system, including an antenna coupler, a processing matrix, and a power compensation module. In this application, a sampling module samples a radio frequency (RF) signal to obtain a sampled signal. Upon receiving the sampled signal, the control module compares it with a reference frequency signal set within the control module to obtain the intensity level corresponding to the sampled signal. Based on the intensity level, the control module controls at least two frequency conversion modules to perform continuous multiple frequency conversions on the RF signal, thereby generating a reference RF signal that meets the requirements for transmission. The power compensation module compensates for the power consumption of the reference RF signal during transmission from the antenna coupler to the Doppler radar, and then transmits the obtained pre-transmission RF signal from the antenna coupler to the Doppler radar.

Description

Technical Field

[0001] This utility model relates to the field of Doppler radar signal processing technology, and in particular to a Doppler radar processing system. Background Technology

[0002] Doppler radar is a speed measurement device with high speed measurement accuracy, stable error, and resistance to interference from the external environment. It can be used for carrier speed measurement and aircraft navigation.

[0003] Among the publicly disclosed technologies, such as patent number "202410215552.8", a non-contact Doppler radar simulation system is disclosed, including: an antenna coupler, a dynamic frequency conversion module, a processing module, a simulation model, a conversion module, and a compensation module. In the up-conversion and down-conversion, this invention uses multiple up-converters or multiple down-converters connected in series in the frequency conversion matrix, and employs the same local oscillator design within the same frequency conversion matrix, achieving signal coherence between the up-converter and down-converter. Adding output power control at the RF output terminal of the up-converter can simulate the spatial transmission characteristics of electromagnetic waves, achieving precise control of radar echo power. Although this technical means reduces RF signal power consumption, it requires multiple prediction processing of the RF signal and simulation, making the overall processing complex. Utility Model Content

[0004] In view of this, the main objective of this utility model is to provide a Doppler radar processing system.

[0005] The technical solution adopted in this utility model is as follows:

[0006] The Doppler radar processing system includes:

[0007] Antenna coupler, used to receive radio frequency signals transmitted by Doppler radar;

[0008] A processing matrix, the processing matrix having a sampling module, a control module and multiple frequency conversion modules;

[0009] The sampling module is connected to the antenna coupler and is used to sample the radio frequency signal to obtain a sampled signal;

[0010] After receiving the sampling signal, the control module compares the sampling signal with the reference frequency signal set in the control module to obtain the intensity level corresponding to the sampling signal.

[0011] According to the strength level, the control module controls at least two frequency conversion modules to combine and perform multiple frequency conversions on the radio frequency signal to generate a reference radio frequency signal that meets the requirements for transmission.

[0012] The power compensation module is used to compensate for the power consumption of the reference radio frequency signal during the transmission of the reference radio frequency signal from the antenna coupler to the Doppler radar, so as to obtain the pre-transmitted radio frequency signal; and to send the obtained pre-transmitted radio frequency signal from the antenna coupler to the Doppler radar.

[0013] Furthermore, multiple frequency conversion modules are connected to each other via frequency conversion switches, and each frequency conversion module consists of at least two frequency converters connected in series. The frequency conversion switches are connected to a control module, which controls at least two frequency conversion modules to be combined according to the intensity level of the sampled signal to perform multiple frequency conversions on the radio frequency signal, thereby generating a reference radio frequency signal that meets the requirements for transmission.

[0014] Furthermore, at least two of the frequency converters connected in series have the same reference frequency coefficient, and the frequency converters perform multiple frequency conversion processes on the radio frequency signal based on the reference frequency coefficient.

[0015] Furthermore, the control module is equipped with:

[0016] Reference unit,

[0017] A configuration unit is coupled to the reference unit to set the level range of the reference frequency signal of the reference unit, and each level range corresponds to the intensity level of the reference frequency signal.

[0018] A comparator, coupled to the reference unit, compares the sampled signal with the reference frequency signal of the reference unit one by one to obtain the intensity level corresponding to the sampled signal.

[0019] The control unit is connected to the comparator and multiple frequency conversion modules. The control unit controls at least two frequency conversion modules to perform multiple frequency conversions on the radio frequency signal according to the intensity level of the sampled signal, thereby generating a reference radio frequency signal that meets the requirements for transmission.

[0020] Furthermore, the power compensation module includes:

[0021] An ADC circuit is used to receive the reference radio frequency signal and convert the reference radio frequency signal into a digital signal;

[0022] The processing circuit is connected to the ADC circuit and, based on the difference between the digital signal and the reference signal, obtains the power consumption of the reference radio frequency signal during the transmission of the antenna coupler to the Doppler radar.

[0023] A mixer is used to perform power compensation on the pre-transmitted spectrum signal with the power consumption mentioned above.

[0024] Furthermore, the ADC circuit adopts a parallel comparator type ADC circuit.

[0025] Compared with existing technologies, this application simplifies the processing by replacing the dynamic frequency conversion module, processing module, and simulation model in the background technology with a processing matrix consisting of a sampling module, a control module, and multiple frequency conversion modules. The entire processing not only obtains a reference radio frequency signal that meets the requirements for transmission, but also reduces the power consumption that occurs when the signal flows through different modules.

[0026] In this application, the sampling module samples the radio frequency signal to obtain a sampled signal; after receiving the sampled signal, the control module compares the sampled signal with a reference frequency signal set in the control module to obtain the intensity level corresponding to the sampled signal; according to the intensity level, the control module controls at least two frequency conversion modules to combine and perform multiple consecutive frequency conversion processes on the radio frequency signal, thereby generating a reference radio frequency signal that meets the requirements for transmission. Compared with the technical means disclosed in the background art, this application does not require the dynamic frequency conversion module to perform multiple estimations and simulation models, which greatly simplifies the processing process and increases the signal processing efficiency. Attached Figure Description

[0027] The following figures are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0028] Figure 1 This is a general schematic diagram of the framework of this utility model;

[0029] Figure 2 This is a schematic diagram of the parallel comparison ADC circuit in this invention. Detailed Implementation

[0030] To make the objectives, technical solutions, design methods, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this utility model.

[0031] Reference Figures 1 to 2 This utility model provides a Doppler radar processing system. It includes:

[0032] Antenna coupler, used to receive radio frequency signals transmitted by Doppler radar;

[0033] A processing matrix, the processing matrix having a sampling module, a control module and multiple frequency conversion modules;

[0034] The sampling module is connected to the antenna coupler and is used to sample the radio frequency signal to obtain a sampled signal;

[0035] After receiving the sampling signal, the control module compares the sampling signal with the reference frequency signal set in the control module to obtain the intensity level corresponding to the sampling signal.

[0036] According to the strength level, the control module controls at least two frequency conversion modules to combine and perform multiple frequency conversions on the radio frequency signal to generate a reference radio frequency signal that meets the requirements for transmission.

[0037] The power compensation module is used to compensate for the power consumption of the reference radio frequency signal during the transmission of the reference radio frequency signal from the antenna coupler to the Doppler radar, so as to obtain the pre-transmitted radio frequency signal; and to send the obtained pre-transmitted radio frequency signal from the antenna coupler to the Doppler radar.

[0038] In the above, multiple frequency conversion modules are connected by frequency conversion switches, and each frequency conversion module consists of at least two frequency converters connected in series. The frequency conversion switches are connected to a control module, which controls at least two frequency conversion modules to be combined according to the intensity level of the sampled signal to perform multiple frequency conversions on the radio frequency signal, thereby generating a reference radio frequency signal that meets the requirements for transmission.

[0039] In the above configuration, each frequency converter module consists of multiple frequency converters connected in series via a connection switch, which is also connected to the control module. This allows for different combinations of frequency converter modules to be configured according to actual needs, maintaining the flexibility of the entire system.

[0040] In the above, at least two frequency converters connected in series have the same reference frequency coefficient, and the frequency converters perform multiple frequency conversions on the radio frequency signal based on the reference frequency coefficient.

[0041] It should be noted that multiple inverters connected in series perform incremental and continuous frequency conversion processing on the radio frequency signal. In other words, each subsequent inverter uses the signal processed by the previous inverter as a reference for further frequency conversion.

[0042] In the above, the control module is equipped with:

[0043] Reference unit,

[0044] A configuration unit is coupled to the reference unit to set the level range of the reference frequency signal of the reference unit, and each level range corresponds to the intensity level of the reference frequency signal.

[0045] A comparator, coupled to the reference unit, compares the sampled signal with the reference frequency signal of the reference unit one by one to obtain the intensity level corresponding to the sampled signal.

[0046] The control unit is connected to the comparator and multiple frequency conversion modules. The control unit controls at least two frequency conversion modules to perform multiple frequency conversions on the radio frequency signal according to the intensity level of the sampled signal, thereby generating a reference radio frequency signal that meets the requirements for transmission.

[0047] In the above, the power compensation module includes:

[0048] An ADC circuit is used to receive the reference radio frequency signal and convert the reference radio frequency signal into a digital signal;

[0049] The processing circuit is connected to the ADC circuit and, based on the difference between the digital signal and the reference signal, obtains the power consumption of the reference radio frequency signal during the transmission of the antenna coupler to the Doppler radar.

[0050] A mixer is used to perform power compensation on the pre-transmitted spectrum signal with the power consumption mentioned above.

[0051] Furthermore, the ADC circuit employs a parallel comparator-type ADC circuit. This parallel comparator-type ADC circuit includes a resistor divider, a voltage comparator, a digital register, and an encoder. Taking this application as an example, this application provides a total of five voltage levels, U1-U5. The resistor divider quantizes the input reference voltage threshold into five comparison levels, U1-U5, with the values ​​of the five comparison levels increasing sequentially. The voltage comparator compares the input voltage formed based on the reference RF signal with the reference voltage threshold. In this application, one end of each of the multiple voltage comparators is connected to the same capacitor, and the other end is connected together as the input terminal of the sample-and-hold analog voltage. The comparison result between the input voltage and the reference voltage is output by the voltage comparator and stored in the register to eliminate logic errors caused by the different processing speeds of the multiple voltage comparators. The encoder performs binary encoding on the signal sent from the register and finally outputs the digital signal corresponding to this application.

[0052] The principle of this application is as follows: the antenna coupler receives the radio frequency signal transmitted by the Doppler radar; the sampling module samples the radio frequency signal to obtain a sampled signal; after receiving the sampled signal, the control module compares the sampled signal with a reference frequency signal set in the control module to obtain the intensity level corresponding to the sampled signal; according to the intensity level, the control module controls at least two frequency conversion modules to combine and perform multiple consecutive frequency conversions on the radio frequency signal to generate a reference radio frequency signal that meets the requirements for transmission; the power compensation module is used to compensate for the power consumption of the reference radio frequency signal during the transmission of the reference radio frequency signal from the antenna coupler to the Doppler radar to obtain a pre-transmitted radio frequency signal; the obtained pre-transmitted radio frequency signal is sent from the antenna coupler to the Doppler radar.

[0053] Compared with existing technologies, this application simplifies the processing by replacing the dynamic frequency conversion module, processing module, and simulation model in the background technology with a processing matrix consisting of a sampling module, a control module, and multiple frequency conversion modules. The entire processing not only obtains a reference radio frequency signal that meets the requirements for transmission, but also reduces the power consumption that occurs when the signal flows through different modules.

[0054] In this application, the sampling module samples the radio frequency signal to obtain a sampled signal; after receiving the sampled signal, the control module compares the sampled signal with a reference frequency signal set in the control module to obtain the intensity level corresponding to the sampled signal; according to the intensity level, the control module controls at least two frequency conversion modules to combine and perform multiple consecutive frequency conversion processes on the radio frequency signal, thereby generating a reference radio frequency signal that meets the requirements for transmission. Compared with the technical means disclosed in the background art, this application does not require the dynamic frequency conversion module to perform multiple estimations and simulation models, which greatly simplifies the processing process and increases the signal processing efficiency.

[0055] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A Doppler radar processing system, characterized in that, include: Antenna coupler, used to receive radio frequency signals transmitted by Doppler radar; A processing matrix, the processing matrix having a sampling module, a control module and multiple frequency conversion modules; The sampling module is connected to the antenna coupler and is used to sample the radio frequency signal to obtain a sampled signal; After receiving the sampling signal, the control module compares the sampling signal with the reference frequency signal set in the control module to obtain the intensity level corresponding to the sampling signal. According to the strength level, the control module controls at least two frequency conversion modules to combine and perform multiple frequency conversions on the radio frequency signal to generate a reference radio frequency signal that meets the requirements for transmission. The power compensation module is used to compensate for the power consumption of the reference radio frequency signal during the transmission of the reference radio frequency signal from the antenna coupler to the Doppler radar, so as to obtain the pre-transmitted radio frequency signal; and to send the obtained pre-transmitted radio frequency signal from the antenna coupler to the Doppler radar.

2. The Doppler radar processing system according to claim 1, characterized in that, Multiple frequency conversion modules are connected to each other via frequency conversion switches, and each frequency conversion module consists of at least two connected in series. The frequency conversion switches are connected to a control module, which controls at least two frequency conversion modules to be combined according to the intensity level of the sampled signal to perform multiple frequency conversions on the radio frequency signal, thereby generating a reference radio frequency signal that meets the requirements for transmission.

3. The Doppler radar processing system according to claim 2, characterized in that, At least two frequency converters connected in series have the same reference frequency coefficient, and the frequency converters perform multiple frequency conversions on the radio frequency signal based on the reference frequency coefficient.

4. The Doppler radar processing system according to claim 1, characterized in that, The control module is equipped with: Reference unit, A configuration unit is coupled to the reference unit to set the level range of the reference frequency signal of the reference unit, and each level range corresponds to the intensity level of the reference frequency signal. A comparator, coupled to the reference unit, compares the sampled signal with the reference frequency signal of the reference unit one by one to obtain the intensity level corresponding to the sampled signal. The control unit is connected to the comparator and multiple frequency conversion modules. The control unit controls at least two frequency conversion modules to perform multiple frequency conversions on the radio frequency signal according to the intensity level of the sampled signal, thereby generating a reference radio frequency signal that meets the requirements for transmission.

5. The Doppler radar processing system according to claim 1, characterized in that, The power compensation module includes: An ADC circuit is used to receive the reference radio frequency signal and convert the reference radio frequency signal into a digital signal; The processing circuit is connected to the ADC circuit and, based on the difference between the digital signal and the reference signal, obtains the power consumption of the reference radio frequency signal during the transmission of the antenna coupler to the Doppler radar. A mixer is used to compensate the power of the pre-transmitted radio frequency signal with the power consumption.

6. The Doppler radar processing system according to claim 5, characterized in that, The ADC circuit is a parallel comparator type ADC circuit.

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