CN212255700U - Wide dynamic range receiving channel system - Google Patents
Wide dynamic range receiving channel system Download PDFInfo
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- CN212255700U CN212255700U CN202020884664.XU CN202020884664U CN212255700U CN 212255700 U CN212255700 U CN 212255700U CN 202020884664 U CN202020884664 U CN 202020884664U CN 212255700 U CN212255700 U CN 212255700U
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Abstract
The utility model discloses a wide dynamic range receiving channel system, which amplifies the signal through a low noise amplifier and sends the amplified signal to a preselection filter; the preselection filter filters the received amplified signal and sends the filtered amplified signal to the mixer; the mixer mixes the received amplified signal after being filtered with a local oscillator signal to obtain an intermediate frequency signal, and sends the intermediate frequency signal to an intermediate frequency amplifier; the intermediate frequency amplifier amplifies the received intermediate frequency signal and sends the amplified intermediate frequency signal to an intermediate frequency filter; the intermediate frequency filter filters the received amplified intermediate frequency signal and sends the filtered amplified intermediate frequency signal to the digital signal processor; the digital signal processor processes the received amplified intermediate frequency signal after filtering to obtain a signal with a wide dynamic range. The utility model discloses can effectual improvement receiving channel's dynamic range.
Description
Technical Field
The utility model relates to a receive channel system technical field especially relates to a wide dynamic range receive channel system.
Background
Parameters such as density, reflectivity factor, distance and the like of the meteorological precipitation target are easy to change violently, and higher requirements are put forward for the dynamic range which can be processed by the meteorological radar receiving system. On the premise of ensuring extremely high sensitivity, the radio frequency receiver system should improve the linearity of the receiver as much as possible, minimize signal distortion and have the lowest bit error rate, widen the dynamic range of the receiver as much as possible, make the adaptability of the receiver larger, have stronger anti-interference capability, and put forward higher requirements on the linear dynamic range of a receiving channel.
Therefore, how to effectively increase the dynamic range of the receiving channel is an urgent problem to be solved.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a wide dynamic range receiving channel system can the effectual dynamic range who improves the receiving channel.
The utility model provides a wide dynamic range receiving channel system, include: the low noise amplifier, the preselection filter, the mixer, the intermediate frequency amplifier, the intermediate frequency filter and the digital signal processor; wherein:
the low noise amplifier amplifies the signal and sends the amplified signal to the preselection filter connected with the low noise amplifier;
the preselection filter filters the received amplified signals and sends the filtered amplified signals to the frequency mixer connected with the preselection filter;
the mixer mixes the received amplified signal after being filtered with a local oscillator signal to obtain an intermediate frequency signal, and sends the intermediate frequency signal to the intermediate frequency amplifier connected with the mixer;
the intermediate frequency amplifier amplifies the received intermediate frequency signal and sends the amplified intermediate frequency signal to the intermediate frequency filter;
the intermediate frequency filter filters the received amplified intermediate frequency signal and sends the filtered amplified intermediate frequency signal to the digital signal processor connected with the intermediate frequency filter;
and the digital signal processor processes the received amplified intermediate frequency signal after filtering to obtain a signal with a wide dynamic range.
Preferably, the low noise amplifier is a low noise amplifier with a 1dB compression point improved from-8 dBm to 5 dBm.
Preferably, the preselection filter is a filter with a 1dB compression point that increases from 14dBm to 22 dBm.
Preferably, the signal processor includes: a tuning circuit and an analog-to-digital conversion device.
Preferably, the tuning circuit comprises: the device comprises a power divider, a high-amplitude signal measuring channel and a low-amplitude signal measuring channel; the analog-to-digital conversion device includes: a first analog-to-digital converter and a second analog-to-digital converter; wherein:
the power divider is respectively connected with the high-amplitude signal measuring channel and the low-amplitude signal measuring channel;
the high-amplitude signal measurement channel is connected with the first analog-to-digital converter;
the low-amplitude signal measurement channel is connected to the second analog-to-digital converter.
Preferably, the high amplitude signal measurement channel comprises: an attenuator and a first transformer; wherein:
one end of the attenuator is connected with the power divider, and the other end of the attenuator is connected with one end of the first transformer;
the other end of the first transformer is connected with the first analog-to-digital converter.
Preferably, the low amplitude signal measurement channel comprises: an amplitude limiter, an amplifier and a second transformer; wherein:
one end of the amplitude limiter is connected with the power divider, and the other end of the amplitude limiter is connected with one end of the amplifier;
the other end of the amplifier is connected with one end of the second transformer;
and the other end of the second transformer is connected with the second analog-to-digital converter.
To sum up, the utility model discloses a wide dynamic range receiving channel system, include: the low noise amplifier, the preselection filter, the mixer, the intermediate frequency amplifier, the intermediate frequency filter and the digital signal processor; wherein: the low-noise amplifier amplifies the signal and sends the amplified signal to the preselection filter connected with the low-noise amplifier; the preselection filter filters the received amplified signals and sends the filtered amplified signals to a mixer connected with the preselection filter; the mixer mixes the received amplified signal after being filtered with a local oscillator signal to obtain an intermediate frequency signal, and sends the intermediate frequency signal to an intermediate frequency amplifier connected with the mixer; the intermediate frequency amplifier amplifies the received intermediate frequency signal and sends the amplified intermediate frequency signal to an intermediate frequency filter; the intermediate frequency filter filters the received amplified intermediate frequency signal and sends the filtered amplified intermediate frequency signal to a digital signal processor connected with the intermediate frequency filter; the digital signal processor processes the received amplified intermediate frequency signal after filtering to obtain a signal with a wide dynamic range. The utility model discloses can effectual improvement receiving channel's dynamic range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment 1 of a wide dynamic range receiving channel system disclosed in the present invention;
fig. 2 is a schematic structural diagram of an embodiment 2 of a wide dynamic range receiving channel system disclosed in the present invention;
fig. 3 is a schematic structural diagram of an embodiment 3 of a wide dynamic range receiving channel system disclosed in the present invention;
fig. 4 is a schematic structural diagram of an embodiment 4 of a wide dynamic range receiving channel system disclosed in the present invention;
fig. 5 is a schematic structural diagram of an embodiment 5 of a wide dynamic range receiving channel system disclosed in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, for the utility model discloses a wide dynamic range receiving channel system embodiment 1's schematic structure diagram, the system includes: the low noise amplifier, the preselection filter, the mixer, the intermediate frequency amplifier, the intermediate frequency filter and the digital signal processor; wherein:
the low-noise amplifier amplifies the signal and sends the amplified signal to a preselection filter connected with the low-noise amplifier;
the preselection filter filters the received amplified signals and sends the filtered amplified signals to a mixer connected with the preselection filter;
the mixer mixes the received amplified signal after being filtered with a local oscillator signal to obtain an intermediate frequency signal, and sends the intermediate frequency signal to an intermediate frequency amplifier connected with the mixer;
the intermediate frequency amplifier amplifies the received intermediate frequency signal and sends the amplified intermediate frequency signal to an intermediate frequency filter;
the intermediate frequency filter filters the received amplified intermediate frequency signal and sends the filtered amplified intermediate frequency signal to a digital signal processor connected with the intermediate frequency filter;
the digital signal processor processes the received amplified intermediate frequency signal after filtering to obtain a signal with a wide dynamic range.
The working principle of the wide dynamic range receiving channel system disclosed by the embodiment is as follows: when the dynamic range of a receiving channel needs to be widened, a low-noise amplifier amplifies signals (such as weak radar weather echo signals) received by an antenna so as to reduce the interference of noise; after being amplified by a low noise amplifier, the signal is input to a preselection filter; the preselection filter filters the signal amplified by the low noise amplifier to realize the suppression of the stray signal and ensure the image suppression index of the receiver system. The signal is filtered by the preselection filter and then input to the mixer, the mixer mixes the received filtered signal with the local oscillator signal to be converted into an intermediate frequency signal, the intermediate frequency signal is input to the intermediate frequency amplifier for amplification, then the intermediate frequency signal is filtered by the intermediate frequency filter and input to the digital signal processor, and the digital signal processor processes the received filtered amplified intermediate frequency signal to obtain a signal with a wide dynamic range, so that the dynamic range of a receiving channel is effectively improved.
As shown in fig. 2, for the utility model discloses a wide dynamic range receives the schematic structure of channel system embodiment 2, the system includes: the low noise amplifier, the preselection filter, the mixer, the intermediate frequency amplifier, the intermediate frequency filter and the digital signal processor; wherein the digital signal processor includes: a tuning circuit and an analog-to-digital conversion device; wherein:
the low-noise amplifier amplifies the signal and sends the amplified signal to a preselection filter connected with the low-noise amplifier;
the preselection filter filters the received amplified signals and sends the filtered amplified signals to a mixer connected with the preselection filter;
the mixer mixes the received amplified signal after being filtered with a local oscillator signal to obtain an intermediate frequency signal, and sends the intermediate frequency signal to an intermediate frequency amplifier connected with the mixer;
the intermediate frequency amplifier amplifies the received intermediate frequency signal and sends the amplified intermediate frequency signal to an intermediate frequency filter;
the intermediate frequency filter filters the received amplified intermediate frequency signal and sends the filtered amplified intermediate frequency signal to a digital signal processor connected with the intermediate frequency filter;
a tuning circuit and an analog-to-digital conversion device in the digital signal processor process the received filtered amplified intermediate frequency signal to obtain a signal with a wide dynamic range.
The working principle of the wide dynamic range receiving channel system disclosed by the embodiment is as follows: when the dynamic range of a receiving channel needs to be widened, a low-noise amplifier amplifies signals (such as weak radar weather echo signals) received by an antenna so as to reduce the interference of noise; after being amplified by a low noise amplifier, the signal is input to a preselection filter; the preselection filter filters the signal amplified by the low noise amplifier to realize the suppression of the stray signal and ensure the image suppression index of the receiver system. The signal is filtered by the preselection filter and then input to the mixer, the mixer mixes the received filtered signal with the local oscillator signal to be converted into an intermediate frequency signal, the intermediate frequency signal is input to the intermediate frequency amplifier for amplification, and then the intermediate frequency signal is filtered by the intermediate frequency filter and input to the digital signal processor, an analog-to-digital conversion device with excellent performance is used in the digital signal processor, and the echo voltage range before entering the analog-to-digital conversion device can meet the requirement of the wide dynamic range of a receiving channel system through a tuning circuit at the front end of the analog-to-digital conversion device, so that the wide dynamic range of the receiving channel system is realized.
As shown in fig. 3, for the utility model discloses a wide dynamic range receiving channel system embodiment 3's schematic structure diagram, the system includes: the low noise amplifier, the preselection filter, the mixer, the intermediate frequency amplifier, the intermediate frequency filter and the digital signal processor; wherein the digital signal processor includes: a tuning circuit and an analog-to-digital conversion device; the tuning circuit includes: the device comprises a power divider, a high-amplitude signal measuring channel and a low-amplitude signal measuring channel; the analog-to-digital conversion device includes: a first analog-to-digital converter and a second analog-to-digital converter;
the low-noise amplifier amplifies the signal and sends the amplified signal to a preselection filter connected with the low-noise amplifier;
the preselection filter filters the received amplified signals and sends the filtered amplified signals to a mixer connected with the preselection filter;
the mixer mixes the received amplified signal after being filtered with a local oscillator signal to obtain an intermediate frequency signal, and sends the intermediate frequency signal to an intermediate frequency amplifier connected with the mixer;
the intermediate frequency amplifier amplifies the received intermediate frequency signal and sends the amplified intermediate frequency signal to an intermediate frequency filter;
the intermediate frequency filter filters the received amplified intermediate frequency signal and sends the filtered amplified intermediate frequency signal to a digital signal processor connected with the intermediate frequency filter;
a power divider in the digital signal processor is respectively connected with the high-amplitude signal measuring channel and the low-amplitude signal measuring channel; the high-amplitude signal measurement channel is connected with the first analog-to-digital converter; the low-amplitude signal measurement channel is connected to a second analog-to-digital converter.
The working principle of the wide dynamic range receiving channel system disclosed by the embodiment is as follows: when the dynamic range of a receiving channel needs to be widened, a low-noise amplifier amplifies signals (such as weak radar weather echo signals) received by an antenna so as to reduce the interference of noise; after being amplified by a low noise amplifier, the signal is input to a preselection filter; the preselection filter filters the signal amplified by the low noise amplifier to realize the suppression of the stray signal and ensure the image suppression index of the receiver system. The signal is filtered by the preselection filter and then input to the mixer, the mixer mixes the received filtered signal with the local oscillator signal to be converted into an intermediate frequency signal, the intermediate frequency signal is input to the intermediate frequency amplifier for amplification, and then the intermediate frequency signal is filtered by the intermediate frequency filter and input to the digital signal processor, an analog-to-digital conversion device with excellent performance is used in the digital signal processor, and the echo voltage range before entering the analog-to-digital conversion device can meet the requirement of the wide dynamic range of a receiving channel system through a tuning circuit at the front end of the analog-to-digital conversion device, so that the wide dynamic range of the receiving channel system is realized. Specifically, the filtered amplified intermediate frequency signal is firstly divided into two paths of signals with the same amplitude by a power divider, and then one path of signals is converted into differential signals through a high-amplitude signal measuring channel and is subjected to analog-to-digital conversion by a first analog-to-digital converter, and the channel is responsible for measuring the high-amplitude signals; the other path is converted into a differential signal through a low-amplitude signal measuring channel, analog-to-digital conversion is carried out by a second analog-to-digital converter, the channel is responsible for measuring the low-amplitude signal, and then data output by the first analog-to-digital converter and the second analog-to-digital converter are synthesized in a correction synthesis mode, so that the dynamic range of the digital signal processor can be widened, and the wide dynamic range of a receiving channel system is further realized.
As shown in fig. 4, for the utility model discloses a wide dynamic range receiving channel system embodiment 4's schematic structure diagram, the system includes: the low noise amplifier, the preselection filter, the mixer, the intermediate frequency amplifier, the intermediate frequency filter and the digital signal processor; wherein the digital signal processor includes: a tuning circuit and an analog-to-digital conversion device; the tuning circuit includes: the device comprises a power divider, a high-amplitude signal measuring channel and a low-amplitude signal measuring channel; the analog-to-digital conversion device includes: a first analog-to-digital converter and a second analog-to-digital converter; the high amplitude signal measurement channel includes: an attenuator and a first transformer;
the low-noise amplifier amplifies the signal and sends the amplified signal to a preselection filter connected with the low-noise amplifier;
the preselection filter filters the received amplified signals and sends the filtered amplified signals to a mixer connected with the preselection filter;
the mixer mixes the received amplified signal after being filtered with a local oscillator signal to obtain an intermediate frequency signal, and sends the intermediate frequency signal to an intermediate frequency amplifier connected with the mixer;
the intermediate frequency amplifier amplifies the received intermediate frequency signal and sends the amplified intermediate frequency signal to an intermediate frequency filter;
the intermediate frequency filter filters the received amplified intermediate frequency signal and sends the filtered amplified intermediate frequency signal to a digital signal processor connected with the intermediate frequency filter;
a power divider in the digital signal processor is respectively connected with the high-amplitude signal measuring channel and the low-amplitude signal measuring channel; the high-amplitude signal measurement channel is connected with the first analog-to-digital converter; the low-amplitude signal measuring channel is connected with the second analog-to-digital converter, specifically, one end of an attenuator in the high-amplitude signal measuring channel is connected with the power divider, the other end of the attenuator is connected with one end of a first transformer, and the other end of the first transformer is connected with the first analog-to-digital converter.
The working principle of the wide dynamic range receiving channel system disclosed by the embodiment is as follows: when the dynamic range of a receiving channel needs to be widened, a low-noise amplifier amplifies signals (such as weak radar weather echo signals) received by an antenna so as to reduce the interference of noise; after being amplified by a low noise amplifier, the signal is input to a preselection filter; the preselection filter filters the signal amplified by the low noise amplifier to realize the suppression of the stray signal and ensure the image suppression index of the receiver system. The signal is filtered by the preselection filter and then input to the mixer, the mixer mixes the received filtered signal with the local oscillator signal to be converted into an intermediate frequency signal, the intermediate frequency signal is input to the intermediate frequency amplifier for amplification, and then the intermediate frequency signal is filtered by the intermediate frequency filter and input to the digital signal processor, an analog-to-digital conversion device with excellent performance is used in the digital signal processor, and the echo voltage range before entering the analog-to-digital conversion device can meet the requirement of the wide dynamic range of a receiving channel system through a tuning circuit at the front end of the analog-to-digital conversion device, so that the wide dynamic range of the receiving channel system is realized. Specifically, the filtered amplified intermediate frequency signal is firstly divided into two paths of signals with the same amplitude through a power divider, then one path of signals is converted into differential signals through an attenuator and a first transformer in a high-amplitude signal measuring channel, and analog-to-digital conversion is carried out by a first analog-to-digital converter, and the channel is responsible for measuring the high-amplitude signal; the other path is converted into a differential signal through a low-amplitude signal measuring channel, analog-to-digital conversion is carried out by a second analog-to-digital converter, the channel is responsible for measuring the low-amplitude signal, and then data output by the first analog-to-digital converter and the second analog-to-digital converter are synthesized in a correction synthesis mode, so that the dynamic range of the digital signal processor can be widened, and the wide dynamic range of a receiving channel system is further realized.
As shown in fig. 5, for the utility model discloses a wide dynamic range receives the schematic structure of passageway system embodiment 5, the system includes: the low noise amplifier, the preselection filter, the mixer, the intermediate frequency amplifier, the intermediate frequency filter and the digital signal processor; wherein the digital signal processor includes: a tuning circuit and an analog-to-digital conversion device; the tuning circuit includes: the device comprises a power divider, a high-amplitude signal measuring channel and a low-amplitude signal measuring channel; the analog-to-digital conversion device includes: a first analog-to-digital converter and a second analog-to-digital converter; the high amplitude signal measurement channel includes: an attenuator and a first transformer; the low amplitude signal measurement channel includes: an amplitude limiter, an amplifier and a second transformer; wherein:
the low-noise amplifier amplifies the signal and sends the amplified signal to a preselection filter connected with the low-noise amplifier;
the preselection filter filters the received amplified signals and sends the filtered amplified signals to a mixer connected with the preselection filter;
the mixer mixes the received amplified signal after being filtered with a local oscillator signal to obtain an intermediate frequency signal, and sends the intermediate frequency signal to an intermediate frequency amplifier connected with the mixer;
the intermediate frequency amplifier amplifies the received intermediate frequency signal and sends the amplified intermediate frequency signal to an intermediate frequency filter;
the intermediate frequency filter filters the received amplified intermediate frequency signal and sends the filtered amplified intermediate frequency signal to a digital signal processor connected with the intermediate frequency filter;
a power divider in the digital signal processor is respectively connected with the high-amplitude signal measuring channel and the low-amplitude signal measuring channel; the high-amplitude signal measurement channel is connected with the first analog-to-digital converter; the low-amplitude signal measuring channel is connected with the second analog-to-digital converter, specifically, one end of an attenuator in the high-amplitude signal measuring channel is connected with the power divider, the other end of the attenuator is connected with one end of a first transformer, and the other end of the first transformer is connected with the first analog-to-digital converter; one end of an amplitude limiter in the low-amplitude signal measuring channel is connected with the power divider, the other end of the amplitude limiter is connected with one end of the amplifier, the other end of the amplifier is connected with one end of the second transformer, and the other end of the second transformer is connected with the second analog-to-digital converter.
The working principle of the wide dynamic range receiving channel system disclosed by the embodiment is as follows: when the dynamic range of a receiving channel needs to be widened, a low-noise amplifier amplifies signals (such as weak radar weather echo signals) received by an antenna so as to reduce the interference of noise; after being amplified by a low noise amplifier, the signal is input to a preselection filter; the preselection filter filters the signal amplified by the low noise amplifier to realize the suppression of the stray signal and ensure the image suppression index of the receiver system. The signal is filtered by the preselection filter and then input to the mixer, the mixer mixes the received filtered signal with the local oscillator signal to be converted into an intermediate frequency signal, the intermediate frequency signal is input to the intermediate frequency amplifier for amplification, and then the intermediate frequency signal is filtered by the intermediate frequency filter and input to the digital signal processor, an analog-to-digital conversion device with excellent performance is used in the digital signal processor, and the echo voltage range before entering the analog-to-digital conversion device can meet the requirement of the wide dynamic range of a receiving channel system through a tuning circuit at the front end of the analog-to-digital conversion device, so that the wide dynamic range of the receiving channel system is realized. Specifically, the filtered amplified intermediate frequency signal is firstly divided into two paths of signals with the same amplitude through a power divider, then one path of signals is converted into differential signals through an attenuator and a first transformer in a high-amplitude signal measuring channel, and analog-to-digital conversion is carried out by a first analog-to-digital converter, and the channel is responsible for measuring the high-amplitude signal; the other path of the digital signal is converted into a differential signal through an amplitude limiter, an amplifier and a second transformer in a low-amplitude signal measuring channel, the differential signal is subjected to analog-to-digital conversion through a second analog-to-digital converter, the channel is responsible for measuring the low-amplitude signal, and then data output by the first analog-to-digital converter and data output by the second analog-to-digital converter are synthesized in a correction synthesis mode, so that the dynamic range of the digital signal processor can be widened, and the wide dynamic range of a receiving channel system is further realized.
Specifically, in the above embodiment, the low noise amplifier may be a low noise amplifier whose 1dB compression point is increased from-8 dBm to 5dBm, which further improves the capability of the low noise amplifier to receive large signals.
Specifically, in the above embodiment, the preselection filter may be a filter with a 1dB compression point that is increased from 14dBm to 22dBm, further improving the ability of the preselection filter to receive large signals.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. A wide dynamic range receive channel system, comprising: the low noise amplifier, the preselection filter, the mixer, the intermediate frequency amplifier, the intermediate frequency filter and the digital signal processor; wherein:
the low noise amplifier amplifies the signal and sends the amplified signal to the preselection filter connected with the low noise amplifier;
the preselection filter filters the received amplified signals and sends the filtered amplified signals to the frequency mixer connected with the preselection filter;
the mixer mixes the received amplified signal after being filtered with a local oscillator signal to obtain an intermediate frequency signal, and sends the intermediate frequency signal to the intermediate frequency amplifier connected with the mixer;
the intermediate frequency amplifier amplifies the received intermediate frequency signal and sends the amplified intermediate frequency signal to the intermediate frequency filter;
the intermediate frequency filter filters the received amplified intermediate frequency signal and sends the filtered amplified intermediate frequency signal to the digital signal processor connected with the intermediate frequency filter;
and the digital signal processor processes the received amplified intermediate frequency signal after filtering to obtain a signal with a wide dynamic range.
2. The system of claim 1, wherein the low noise amplifier is a low noise amplifier with a 1dB compression point increased from-8 dBm to 5 dBm.
3. The system of claim 1, wherein the preselect filter is a filter having a 1dB compression point that increases from 14dBm to 22 dBm.
4. The system of claim 1, wherein the signal processor comprises: a tuning circuit and an analog-to-digital conversion device.
5. The system of claim 4, wherein the tuning circuit comprises: the device comprises a power divider, a high-amplitude signal measuring channel and a low-amplitude signal measuring channel; the analog-to-digital conversion device includes: a first analog-to-digital converter and a second analog-to-digital converter; wherein:
the power divider is respectively connected with the high-amplitude signal measuring channel and the low-amplitude signal measuring channel;
the high-amplitude signal measurement channel is connected with the first analog-to-digital converter;
the low-amplitude signal measurement channel is connected to the second analog-to-digital converter.
6. The system of claim 5, wherein the high amplitude signal measurement channel comprises: an attenuator and a first transformer; wherein:
one end of the attenuator is connected with the power divider, and the other end of the attenuator is connected with one end of the first transformer;
the other end of the first transformer is connected with the first analog-to-digital converter.
7. The system of claim 6, wherein the low amplitude signal measurement channel comprises: an amplitude limiter, an amplifier and a second transformer; wherein:
one end of the amplitude limiter is connected with the power divider, and the other end of the amplitude limiter is connected with one end of the amplifier;
the other end of the amplifier is connected with one end of the second transformer;
and the other end of the second transformer is connected with the second analog-to-digital converter.
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| CN202020884664.XU CN212255700U (en) | 2020-05-22 | 2020-05-22 | Wide dynamic range receiving channel system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116032302A (en) * | 2023-02-06 | 2023-04-28 | 成都正扬博创电子技术有限公司 | Miniaturized airborne anti-collision zero intermediate frequency receiving channel module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116032302A (en) * | 2023-02-06 | 2023-04-28 | 成都正扬博创电子技术有限公司 | Miniaturized airborne anti-collision zero intermediate frequency receiving channel module |
| CN116032302B (en) * | 2023-02-06 | 2023-12-22 | 成都正扬博创电子技术有限公司 | Miniaturized airborne anti-collision zero intermediate frequency receiving channel module |
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