CN115113167A - Multi-channel radar receiving system - Google Patents
Multi-channel radar receiving system Download PDFInfo
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- CN115113167A CN115113167A CN202210918224.5A CN202210918224A CN115113167A CN 115113167 A CN115113167 A CN 115113167A CN 202210918224 A CN202210918224 A CN 202210918224A CN 115113167 A CN115113167 A CN 115113167A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
Abstract
The disclosure provides a multichannel radar receiving system, which comprises an echo receiving channel and a data processing unit. The echo receiving channels comprise a first receiving channel and a second receiving channel; the first receiving channel gains the received first echo signal and processes the gained first echo signal into a first echo intermediate frequency signal; the second receiving channel gains the received second echo signal and processes the gained second echo signal into a second echo intermediate frequency signal; the intensity of the first echo signal is smaller than a threshold value, and the intensity of the second echo signal is larger than the threshold value; the data processing unit is configured to perform in-phase orthogonal transformation on the received first echo intermediate frequency signal and the received second echo intermediate frequency signal to obtain amplitude and phase data, so that the dynamic range and the sensitivity of the multichannel radar receiving system are greatly improved.
Description
Technical Field
The disclosure relates to the technical field of radar, in particular to a multi-channel radar receiving system.
Background
A radar receiver is a device that amplifies, transforms, and processes echo signals in a radar. The dynamic range of a radar receiver is the range of input signals that allows the receiver to detect the received signal without distorting the received signal, and is generally measured by the input signal power. If the received signal is too strong, distortion of an amplifier and noise are introduced, and overload saturation occurs in a receiver; if the signal is too weak, the signal cannot be detected. The dynamic range of the receiver is improved, and the method has important significance for the improvement of radar technology.
Contents of the invention
The present disclosure provides a multi-channel radar receiving system for solving the problems existing in the prior art.
The present disclosure provides a multichannel radar receiving system, including:
the echo receiving channel comprises a first receiving channel and a second receiving channel; the first receiving channel gains the received first echo signal and processes the gained first echo signal into a first echo intermediate frequency signal; the second receiving channel gains the received second echo signal and processes the gained second echo signal into a second echo intermediate frequency signal; the intensity of the first echo signal is smaller than a threshold value, and the intensity of the second echo signal is larger than the threshold value;
the data processing unit is configured to perform in-phase and quadrature conversion on the received first echo intermediate frequency signal and the second echo intermediate frequency signal to obtain amplitude and phase data.
In one embodiment of the present disclosure, the first receiving channel is a high gain receiving channel, and the second receiving channel is a low gain receiving channel.
In an embodiment of the present disclosure, the first receiving channel is configured to filter and down-convert a received first echo signal into a first echo intermediate frequency signal; and the second receiving channel is used for filtering and down-converting the received second echo signal into a second echo intermediate frequency signal.
In one embodiment of the present disclosure, the present disclosure further includes a horizontal channel and a first amplifier, wherein the horizontal channel is configured to receive a horizontal echo signal and output the received horizontal echo signal to the first receiving channel and the second receiving channel through the first amplifier.
In one embodiment of the present disclosure, the echo receiving channels further include a third receiving channel, a fourth receiving channel; the third receiving channel gains the received third echo signal and processes the gained third echo signal into a third echo intermediate frequency signal; the fourth receiving channel gains the received fourth echo signal and processes the fourth echo signal after gain into a fourth echo intermediate frequency signal; wherein the intensity of the third echo signal is less than a threshold value, and the intensity of the fourth echo signal is greater than the threshold value; the data processing unit is configured to perform in-phase orthogonal transformation on the received third echo intermediate frequency signal and the fourth echo intermediate frequency signal to obtain amplitude and phase data.
In an embodiment of the present disclosure, the present disclosure further includes a vertical channel and a second amplifier, the vertical channel is configured to receive a vertical echo signal, and the second amplifier outputs the received vertical echo signal to the third receiving channel and the fourth receiving channel, respectively.
In one embodiment of the present disclosure, the first amplifier and the second amplifier are low noise amplifiers.
In one embodiment of the present disclosure, the first receiving channel is a high gain receiving channel, and the second receiving channel is a low gain receiving channel;
the third receiving channel is used for filtering and down-converting the received third echo signal into a third echo intermediate frequency signal; and the fourth receiving channel is used for filtering and down-converting the received strong echo signal into a fourth echo intermediate frequency signal.
In one embodiment of the present disclosure, the data processing unit includes: the first data processing device performs analog-to-digital conversion on the first echo intermediate frequency signal, the second data processing device performs analog-to-digital conversion on the second echo intermediate frequency signal, the third data processing device performs analog-to-digital conversion on the third echo intermediate frequency signal, and the fourth data processing device performs analog-to-digital conversion on the fourth echo intermediate frequency signal.
In one embodiment of the present disclosure, the first data processing device and the second data processing device perform correction synthesis on the respective obtained intermediate frequency signals to obtain data signals of a horizontal channel; and the third data processing device and the fourth data processing device perform correction synthesis on the obtained intermediate frequency signals respectively to obtain data signals of a vertical channel.
In an embodiment of the present disclosure, the third data processing apparatus and the fourth data processing apparatus perform correction synthesis on the intermediate frequency signals obtained respectively to obtain data signals of a vertical channel.
The multi-channel radar receiving system has the advantages that in the multi-channel radar receiving system, the first receiving channel of the echo receiving channel can receive and process relatively strong echo signals, the second receiving channel can process and receive relatively weak echo signals, and the data processing unit can perform orthogonal synthesis on the strong echo signals and the weak echo signals, so that the dynamic range and the sensitivity of the radar receiving system are greatly improved.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic structural diagram of a multi-channel radar receiving system provided in an embodiment of the present disclosure;
FIG. 2 is a schematic structural diagram of the multi-channel radar receiving system applied to a dual-polarization radar;
fig. 3 is a schematic diagram of the multi-channel radar receiving system applied to the dual-polarization radar.
The one-to-one correspondence between component names and reference numbers in fig. 1 to 3 is as follows:
11. a first receiving channel; 12. a second receiving channel; 13. a third receiving channel; 14. a fourth receive channel; 101. a horizontal channel; 102. a vertical channel; 103. a first amplifier; 104. a second amplifier; 21. a first data processing device; 22. a second data processing device; 23. a third data processing device; 24. and a fourth data processing device.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In this document, "upper", "lower", "front", "rear", "left", "right", and the like are used only to indicate relative positional relationships between relevant portions, and do not limit absolute positions of the relevant portions.
In this document, "first", "second", and the like are used only for distinguishing one from another, and do not indicate the degree and order of importance, the premise that each other exists, and the like.
In this context, "equal", "same", etc. are not strictly mathematical and/or geometric limitations, but also include tolerances as would be understood by a person skilled in the art and allowed for manufacturing or use, etc.
Unless otherwise indicated, numerical ranges herein include not only the entire range within its two endpoints, but also several sub-ranges subsumed therein.
The disclosure provides a multichannel radar receiving system, which comprises an echo receiving channel and a data processing unit. The echo receiving channel is used for receiving and processing echo signals, and the data processing unit is used for further performing analog-digital conversion and correction synthesis on the echo signals.
The echo receiving channel comprises a first receiving channel and a second receiving channel; the first receiving channel receives and gains the first echo signal, and processes the gained first echo signal into a first echo intermediate frequency signal; and the second receiving channel receives the second echo signal, gains the second echo signal, and processes the second echo signal after the gain into a second echo intermediate frequency signal. The intensity of the first echo signal is smaller than a threshold value, and the intensity of the second echo signal is larger than the threshold value. The threshold of the echo signal can be set according to the requirement, the echo signal with the intensity higher than the threshold is the first echo signal, and the echo signal with the intensity lower than the threshold is the second echo signal. The data processing unit is configured to perform in-phase and quadrature conversion on the received first echo intermediate frequency signal and the second echo intermediate frequency signal to obtain amplitude and phase data.
The multi-channel radar receiving system can be applied to weather radar, or other types of radar. The strength of the echo signal refers to the power of the echo signal, and the echo signal strength of the weather radar depends on certain radar parameters, scattering persistence of a descending water body, the distance from a scattering body to the radar, and the attenuation of a wave beam in a propagation path by an atmospheric medium. From the echo intensities of the weather objects and their distribution, the properties of the weather system can be deduced, and furthermore the echo signal intensities are the basic data for radar measurements of rainfall. Therefore, in radar observation, analysis of the echo signal intensity is important. The first receiving channel can receive and process relatively strong echo signals, the second receiving channel can receive and process relatively weak echo signals, and the data processing unit can perform orthogonal synthesis on the relatively strong echo signals and the relatively weak echo signals, so that the dynamic range and the sensitivity of the radar receiving system are greatly improved, and the stability and the reliability of rear-end data processing are favorably improved.
In one embodiment of the present disclosure, as shown in fig. 1, the first receiving channel 11 is a high gain receiving channel, and the second receiving channel 12 is a low gain receiving channel. The first receiving channel 11 is configured to filter and down-convert the received weak echo signal into an intermediate frequency signal. The second receiving channel 12 is configured to filter and down-convert the received strong echo signal into an intermediate frequency signal.
Specifically, each of the first receiving channel 11 and the second receiving channel 12 may include an amplifier for gain processing of a signal, a filter for filtering processing, a frequency converter for down-conversion processing, and the like. The first receiving channel 11 employs a high gain amplifier, and the second receiving channel 12 employs a low gain amplifier. Of course, other components capable of performing gain, filtering and down-conversion processing on the echo signals may be used in the first receiving channel 11 and the second receiving channel 12. Amplifiers, filters, frequency converters, etc. are all well known elements to those skilled in the art and will not be described in detail in this disclosure.
Gain compression occurs when the input power to the amplifier is increased to reduce the gain of the amplifier and cause a non-linear increase in the output power during the gain process. When the input power increases to the gain compression point, the amplifier saturates and the output power remains constant. In this case, further increasing the amplifier input power does not change the output power either.
The gain factor of the first receiving channel 11 is relatively high, which causes the amplifier to saturate after the stronger echo signal enters the first receiving channel 11, resulting in distortion of the stronger echo signal. When the weak echo signal enters the first receiving channel 11, the linear dynamic range of the radar receiving system can be reached through the gain. Therefore, the intermediate frequency signal of the weak echo is selected from the first echo intermediate frequency signal processed by the first receiving channel 11.
The gain multiple of the second receiving channel 12 is relatively low, when a strong echo signal enters the second receiving channel 12, the strong echo signal can reach the linear dynamic range of the radar receiving system through the gain, and after a part of the weak echo signal enters the second receiving channel 12, the weak echo signal can also reach the linear dynamic range of the radar receiving system. The intermediate frequency signal of the strong echo is selected from the second echo intermediate frequency signal processed by the second receiving channel 12.
The multichannel radar receiving system can be applied to the dual-polarization radar, and the dual-polarization radar can transmit and receive horizontal polarized waves and vertical polarized waves. The dual polarization radar includes a horizontal channel and a vertical channel for receiving echo signals.
In one embodiment of the present disclosure, as shown in fig. 2 and 3, the multi-channel radar receiving system includes a horizontal channel 101, and the horizontal channel 101 is used for receiving a horizontal echo signal. The horizontal channel 101 is connected to the first receiving channel 11 and the second receiving channel 12, and is configured to output the received horizontal echo signal to the first receiving channel 11 and the second receiving channel 12.
In one embodiment of the present disclosure, the multichannel radar receiving system further includes a first amplifier 103, and the horizontal channel 101 is connected to the first receiving channel 11 and the second receiving channel 12 through the first amplifier 103. The horizontal channel 101 outputs the horizontal echo signal to the first amplifier 103, and the first amplifier 103 divides the horizontal echo signal into a first echo signal and a second echo signal, and outputs the first echo signal to the first receiving channel 11 and the second echo signal to the second receiving channel 12. The first echo intermediate frequency signal output by the first receiving channel 11 and the first echo intermediate frequency signal output by the second receiving channel 12 are both intermediate frequency signals of horizontal echoes.
In some embodiments of the present disclosure, the echo receiving channels may further include more receiving channels for receiving echo signals, and different receiving channels may adopt different gain multiples to further improve the dynamic range of the radar receiving system.
In one embodiment of the present disclosure, as shown in fig. 2 and 3, the echo receiving channels further include a third receiving channel 13 and a fourth receiving channel 14; the third receiving channel 13 is configured to receive the third echo signal, perform gain on the third echo signal, and process the third echo signal after gain into a third echo intermediate frequency signal; the fourth receiving channel 14 is configured to receive the fourth echo signal, perform gain on the fourth echo signal, and process the fourth echo signal after gain into a fourth echo intermediate frequency signal. And the intensity of the third echo signal is smaller than the threshold value, and the intensity of the fourth echo signal is larger than the threshold value. The data processing unit is configured to perform in-phase and quadrature conversion on the received third echo intermediate frequency signal and the fourth echo intermediate frequency signal to obtain amplitude and phase data.
In one embodiment of the present disclosure, as shown in fig. 2 and 3, the multi-channel radar receiving system further includes a vertical channel 102, and the vertical channel 102 is configured to receive a vertical echo signal. The vertical channel 102 is connected to the third receiving channel 13 and the fourth receiving channel 14, and is configured to output the received vertical echo signal to the third receiving channel 13 and the fourth receiving channel 14.
In an embodiment of the present disclosure, the third receiving channel 13 is a high-gain receiving channel, the fourth receiving channel 14 is a low-gain receiving channel, and the third receiving channel 13 is configured to filter and down-convert the received weak echo signal into an intermediate frequency signal; the fourth receiving channel 14 is configured to filter and down-convert the received strong echo signal into an intermediate frequency signal.
Specifically, each of the third receiving channel 13 and the fourth receiving channel 14 may include an amplifier for gain processing of the signal, a filter for filtering processing, a frequency converter for down-conversion processing, and the like. Wherein, the third receiving channel 13 adopts a high gain amplifier, and the fourth receiving channel 14 adopts a low gain amplifier. Of course, other components capable of performing gain, filtering and down-conversion processing on the echo signals may be used for the third receiving channel 13 and the fourth receiving channel 14. Amplifiers, filters, frequency converters, etc. are all well known elements to those skilled in the art and will not be described in detail in this disclosure.
Due to the gain compression principle of the amplifier, the gain multiple of the third receiving channel 13 is relatively high, and when a strong echo signal enters the third receiving channel 13, the amplifier is saturated, so that the strong echo signal is distorted; after the weak echo signal enters the fourth receiving channel 14, the linear dynamic range of the radar receiving system can be reached through the gain. Therefore, the intermediate frequency signal of the weak echo is selected from the third echo intermediate frequency signal processed by the third receiving channel 13.
The gain multiple of the fourth receiving channel 14 is relatively low, when a strong echo signal enters the fourth receiving channel 14, the strong echo signal can reach the linear dynamic range of the radar receiving system through the gain, and after a part of the weak echo signal enters the fourth receiving channel 14, the weak echo signal can also reach the linear dynamic range of the radar receiving system. The intermediate frequency signal of the strong echo is selected from the fourth echo intermediate frequency signal processed by the fourth receiving channel 14.
In one embodiment of the present disclosure, as shown in fig. 2 and 3, the multichannel radar receiving system further includes a second amplifier 104, and the vertical channel 102 is connected to the third receiving channel 13 and the fourth receiving channel 14 through the second amplifier 104. The vertical channel 102 outputs the vertical echo signal to the second amplifier 104, and the second amplifier 104 divides the vertical echo signal into a third echo signal and a fourth echo signal and outputs the third echo signal to the third receiving channel 13 and the horizontal fourth echo signal to the fourth receiving channel 14. The third echo intermediate frequency signal output by the third receiving channel 13 and the fourth echo intermediate frequency signal output by the fourth receiving channel 14 are both vertical echo intermediate frequency signals.
In an embodiment of the present disclosure, low noise amplifiers may be used for the first amplifier 103 and the second amplifier 104, so as to reduce interference of noise of the amplifiers to echo signals and improve sensitivity of the multichannel radar receiving system.
In one embodiment of the present disclosure, as shown in fig. 2 and 3, the data processing unit includes a first data processing device 21, a second data processing device 22, a third data processing device 23, and a fourth data processing device 24. The first data processing device 21 is connected to the first receiving channel 11, and is configured to receive the first echo intermediate frequency signal and perform analog-to-digital conversion on the first echo intermediate frequency signal. The second data processing means 22 are connected to the second receiving channel 12 for receiving the second echo intermediate frequency signal and for analog-to-digital converting the second echo intermediate frequency signal. The third data processing device 23 is connected to the third receiving channel 13 for receiving the third echo intermediate frequency signal and performing an analog-to-digital conversion on the third echo intermediate frequency signal. The fourth data processing device 24 is connected to the fourth receiving channel 14 for receiving the fourth echo intermediate frequency signal and performing an analog-to-digital conversion on the fourth echo intermediate frequency signal.
The first data processing device 21 and the second data processing device 22 perform correction and synthesis on the intermediate frequency signals obtained by the respective devices, and finally obtain the data signals of the horizontal channel 101. The third data processing device 23 and the fourth data processing device 24 perform correction and synthesis on the intermediate frequency signals obtained respectively to obtain data signals of the vertical channel 102.
The first echo intermediate frequency signal is transmitted to an analog-to-digital converter of the first data processing device 21 for analog-to-digital conversion, and the second echo intermediate frequency signal is transmitted to an analog-to-digital converter of the second data processing device 22 for analog-to-digital conversion. The analog-to-digital conversion collected data of the first data processing device 21 and the second data processing device 22 are subjected to in-Phase and quadrature conversion, sampling low-pass filtering processing, signals with frequencies exceeding a set critical value are filtered, then the signals are converted into Amplitude (Amplitude) and Phase (Phase) data in the form of I (in-Phase) and Q (quadrature) data, and the Amplitude (Amplitude) and Phase (Phase) data are corrected and synthesized to obtain an integral data signal of a horizontal channel.
The third echo intermediate frequency signal is transmitted to an analog-to-digital converter of the third data processing device 23 for analog-to-digital conversion, and the fourth echo intermediate frequency signal is transmitted to an analog-to-digital converter of the fourth data processing device 24 for analog-to-digital conversion. The analog-to-digital converters of the third data processing device 23 and the fourth data processing device 24 collect data, and perform in-Phase and quadrature conversion, sampling and low-pass filtering to filter out signals with frequencies exceeding a set critical value, and then convert the signals into Amplitude (Amplitude) and Phase (Phase) data in the form of I (in-Phase) and Q (quadrature) data, and obtain an overall data signal of a vertical channel after correction and synthesis.
In the multi-channel radar receiving system in the disclosure, through a four-channel receiving system of a first receiving channel 11, a second receiving channel 12, a third receiving channel 13, and a fourth receiving channel 14, the reception of strong echo signals and weak echo signals is realized, and the linear dynamic range of the dual-polarization radar receiver is widened.
In the working process of the radar, horizontal echo signals received by the antenna are respectively sent to a first receiving channel 11 and a second receiving channel 12 of a multi-channel radar receiving system through the horizontal channels, and received vertical echo signals are respectively sent to a third receiving channel 13 and a fourth receiving channel 14 through the vertical channels. The first receiving channel 11 is a low-noise-coefficient and high-gain receiving channel, and performs gain, filtering and down-conversion processing on the received weak-level echo signal to obtain a first echo intermediate frequency signal. The second receiving channel 12 is a low-gain and high-compression point channel, and performs gain, filtering, and down-conversion processing on the received strong horizontal echo signal to obtain a second echo intermediate frequency signal. The third receiving channel 13 is a low noise coefficient and high gain channel, and performs gain, filtering and down-conversion processing on the received weak vertical echo signal to obtain a third echo intermediate frequency signal. The fourth receiving channel 14 is a low-gain and high-compression-point channel, and performs gain, filtering and down-conversion processing on the received strong vertical echo signal to obtain a fourth echo intermediate-frequency signal.
The first data processing device 21 receives the first echo intermediate frequency signal and performs analog-to-digital conversion, the second data processing device 22 receives the second echo intermediate frequency signal and performs analog-to-digital conversion, and the first echo intermediate frequency signal and the second echo intermediate frequency signal are corrected and synthesized after digital-to-analog conversion to obtain an overall data signal of the horizontal channel. The third data processing device 23 receives the third echo intermediate frequency signal and performs analog-to-digital conversion, the fourth data processing device 24 receives the fourth echo intermediate frequency signal and performs analog-to-digital conversion, and the third echo intermediate frequency signal and the fourth echo intermediate frequency signal are subjected to digital-to-analog conversion and then are corrected and synthesized to obtain an overall data signal of the vertical channel.
The data processing unit can finally acquire the data of the strong horizontal echo signal, the weak horizontal echo wave signal, the strong vertical echo signal and the weak vertical echo signal, so that the linear dynamic range of the weather radar receiver is greatly improved, and the capability of the radar for receiving the strong echo signal and the weak echo signal is improved.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.
Claims (10)
1. A multi-channel radar receiving system, comprising:
echo receiving channels comprising a first receiving channel (11), a second receiving channel (12); the first receiving channel (11) gains the received first echo signal and processes the gained first echo signal into a first echo intermediate frequency signal; the second receiving channel (12) gains the received second echo signal and processes the gained second echo signal into a second echo intermediate frequency signal; the intensity of the first echo signal is smaller than a threshold value, and the intensity of the second echo signal is larger than the threshold value;
the data processing unit is configured to perform in-phase and quadrature conversion on the received first echo intermediate frequency signal and the second echo intermediate frequency signal to obtain amplitude and phase data.
2. The multi-channel radar receiving system according to claim 1, wherein the first receive channel (11) is a high gain receive channel and the second receive channel (12) is a low gain receive channel.
3. The multi-channel radar receiving system according to claim 1, wherein the first receiving channel (11) is configured to filter and down-convert the received first echo signal into a first echo intermediate frequency signal; the second receiving channel (12) is used for filtering and down-converting the received second echo signal into a second echo intermediate frequency signal.
4. The multichannel radar receiving system according to claim 1, further comprising a horizontal channel (101) and a first amplifier (103), wherein the horizontal channel (101) is configured to receive a horizontal echo signal and output the received horizontal echo signal to the first receiving channel (11) and the second receiving channel (12) through the first amplifier (103), respectively.
5. The multi-channel radar reception system of claim 4, characterized in that the echo reception channels further comprise a third reception channel (13), a fourth reception channel (14); the third receiving channel (13) gains the received third echo signal and processes the gained third echo signal into a third echo intermediate frequency signal; the fourth receiving channel (14) gains the received fourth echo signal and processes the fourth echo signal after the gain into a fourth echo intermediate frequency signal; wherein the intensity of the third echo signal is less than a threshold value, and the intensity of the fourth echo signal is greater than the threshold value; the data processing unit is configured to perform in-phase orthogonal transformation on the received third echo intermediate frequency signal and the fourth echo intermediate frequency signal to obtain amplitude and phase data.
6. The multichannel radar receiving system according to claim 5, further comprising a vertical channel (102) and a second amplifier (104), wherein the vertical channel (102) is configured to receive a vertical echo signal, and the received vertical echo signal is output to the third receiving channel (13) and the fourth receiving channel (14) through the second amplifier (104).
7. Multi-channel radar receiving system according to claim 6, wherein the first amplifier (103) and the second amplifier (104) are low noise amplifiers.
8. The multi-channel radar receiving system according to claim 5, wherein the first receive channel (11) is a high gain receive channel and the second receive channel (12) is a low gain receive channel;
the third receiving channel (13) is used for filtering and down-converting the received third echo signal into a third echo intermediate frequency signal; and the fourth receiving channel (14) is used for filtering and down-converting the received strong echo signal into a fourth echo intermediate frequency signal.
9. The multi-channel radar receiving system of claim 5, wherein the data processing unit comprises: the device comprises a first data processing device (21) for performing analog-to-digital conversion on the first echo intermediate frequency signal, a second data processing device (22) for performing analog-to-digital conversion on the second echo intermediate frequency signal, a third data processing device (23) for performing analog-to-digital conversion on the third echo intermediate frequency signal, and a fourth data processing device (24) for performing analog-to-digital conversion on the fourth echo intermediate frequency signal.
10. The multi-channel radar receiving system according to claim 9, wherein the first data processing device (21) and the second data processing device (22) perform correction synthesis on the intermediate frequency signals obtained respectively to obtain data signals of the horizontal channel (101); the third data processing device (23) and the fourth data processing device (24) correct and combine the obtained intermediate frequency signals to obtain data signals of a vertical channel (102).
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| CN117075128A (en) * | 2023-09-11 | 2023-11-17 | 深圳市速腾聚创科技有限公司 | Ranging method, ranging apparatus, electronic device, and computer-readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117075128A (en) * | 2023-09-11 | 2023-11-17 | 深圳市速腾聚创科技有限公司 | Ranging method, ranging apparatus, electronic device, and computer-readable storage medium |
| CN117075128B (en) * | 2023-09-11 | 2024-04-09 | 深圳市速腾聚创科技有限公司 | Ranging method, ranging apparatus, electronic device, and computer-readable storage medium |
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