CN214429543U - Signal processing device based on analog radio station - Google Patents
Signal processing device based on analog radio station Download PDFInfo
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- CN214429543U CN214429543U CN202120751171.3U CN202120751171U CN214429543U CN 214429543 U CN214429543 U CN 214429543U CN 202120751171 U CN202120751171 U CN 202120751171U CN 214429543 U CN214429543 U CN 214429543U
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Abstract
The utility model provides a signal processing apparatus based on analog radio, including DSP treater, tuned circuit, transmission/receiving switch, band pass filter, antenna, high frequency amplifier, buffer amplifier, modulator, ARM, sound output module and sound input module, the antenna links to each other with band pass filter, band pass filter links to each other with transmission/receiving switch, transmission/receiving switch both ends link to each other with tuned circuit and high frequency amplifier respectively, tuned circuit links to each other with the DSP treater, high frequency amplifier links to each other with DSP treater and ARM through buffer amplifier and modulator respectively, ARM and DSP treater to be connected with speaker and microphone through sound output module and sound input module respectively. The utility model discloses interference immunity to the clutter is stronger, and antenna received high frequency signal will become fixed intermediate frequency and in addition in order to enlarge after the mixing, has improved signal reception's sensitivity.
Description
Technical Field
The utility model relates to a simulation radio station technical field particularly, relates to a signal processing apparatus based on simulation radio station.
Background
At present, analog radio stations in the radio station market in China dominate, but analog radio stations generally have a simplex communication mode, namely, the analog radio stations cannot hear called voice in the calling process, cannot simultaneously call the other party when receiving the called voice, and cannot simultaneously receive and transmit.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a signal processing device based on analog radio has solved the general simplex communication mode of analog radio among the prior art, and has the interference immunity less than one side in the communication process, problem that sensitivity is low.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a signal processing apparatus based on analog radio, includes DSP treater, tuned circuit, transmission/receiving switch, band pass filter, antenna, high frequency amplifier, buffer amplifier, modulator, ARM, sound output module and sound input module, the antenna links to each other with band pass filter, band pass filter links to each other with transmission/receiving switch, transmission/receiving switch both ends link to each other with tuned circuit and high frequency amplifier respectively, tuned circuit links to each other with the DSP treater, high frequency amplifier links to each other with DSP treater and ARM through buffer amplifier and modulator respectively, ARM and DSP treater to be connected with speaker and microphone through sound output module and sound input module respectively.
As a preferred scheme, the tuning circuit includes a filter amplifier, a mixer, an intermediate frequency amplifier, a secondary frequency conversion filter, a demodulator and a local oscillator, the filter amplifier, the mixer, the intermediate frequency amplifier, the secondary frequency conversion filter and the demodulator are sequentially connected, and the local oscillator is connected to the mixer.
Preferably, the ARM is connected with a power supply through a DC-DC circuit.
Preferably, the frequency range of the antenna is 156-162 MHz.
Preferably, the modulator is U2790B-MFP, and the high-frequency amplifier is TGA 4040.
Preferably, the DSP processor model is STM32H750XBH6, and the ARM model is STM32F030R8T 6.
Compared with the prior art, the beneficial effects of the utility model include: by adopting a duplex communication technology, the sending and receiving of communication data can be synchronously and alternately carried out in the communication process without mutual influence, and the called voice and communication information can be answered while the calling process is carried out, so that the synchronism and timeliness of the communication information are ensured; and by adopting a secondary frequency conversion scheme, compared with single frequency conversion, the filtering is added once, the clutter immunity is stronger, and a high-frequency signal received by the antenna becomes a fixed intermediate frequency after being mixed, and is amplified, so that the signal receiving sensitivity is improved.
Drawings
The disclosure of the present invention is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:
fig. 1 is a schematic structural diagram of a signal processing apparatus based on an analog radio station according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a tuning circuit according to an embodiment of the present invention.
Detailed Description
It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structural modes and implementation modes can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.
An embodiment according to the present invention is shown in conjunction with fig. 1. A signal processing device based on an analog radio station comprises a DSP (digital signal processor), a tuning circuit, a transmitting/receiving switch, a band-pass filter, an antenna, a high-frequency amplifier, a buffer amplifier, a modulator, an ARM (advanced RISC machine), a sound output module and a sound input module, wherein the antenna is connected with the band-pass filter, the band-pass filter is connected with the transmitting/receiving switch, two ends of the transmitting/receiving switch are respectively connected with the tuning circuit and the high-frequency amplifier, the tuning circuit is connected with the DSP, and the high-frequency amplifier is respectively connected with the DSP and the ARM through the buffer amplifier and the modulator. The buffer amplifier plays a role in matching impedance and meets the requirements of pre-stage voltage amplification and load low-impedance output.
The ARM and the DSP are connected with the loudspeaker and the microphone through the sound output module and the sound input module respectively. The ARM is connected with a power supply through a DC-DC circuit, and the power supply is used for supplying electric energy to the ARM.
Specifically, the frequency range of the antenna is 156-162 MHz. The band-pass filter model is BPF-A580+, and the buffer amplifier model is OPA2354AIDGKR, and the modulator model is U2790B-MFP, and the high frequency amplifier model is TGA4040, and DSP treater model is STM32H750XBH6, and the ARM model is STM32F030R8T 6.
As shown in fig. 2, the tuning circuit includes a filter amplifier, a mixer, an intermediate frequency amplifier, a second-order conversion filter, a demodulator, and a local oscillator, the filter amplifier, the mixer, the intermediate frequency amplifier, the second-order conversion filter, and the demodulator are connected in sequence, and the local oscillator is connected to the mixer. The antenna receives the high-frequency signal, then the high-frequency signal is amplified by the filter amplifier and enters the mixer, at this time, another high-frequency signal output by the local oscillator enters the mixer, the intermediate-frequency signal is output after mixing, the intermediate-frequency signal is amplified by the intermediate-frequency amplifier to obtain enough high gain, then the high-frequency signal is secondarily mixed by the secondary frequency conversion filter, and the audio signal is called by the demodulator to be output. Since the high frequency signal received by the antenna is mixed and then amplified to a fixed intermediate frequency, the signal processing apparatus has high sensitivity.
The utility model discloses a signal processing device based on analog radio, during received signal, transmission/receiving switch switches to the received position, and the high frequency signal that the antenna was received gets into tuned circuit after band pass filter filters the low frequency clutter, and tuned circuit carries out the mixing and demodulates out audio signal output to single chip processor to the input signal, and ARM receives the signal after single chip processor handles, and control sound output module carries out the voice output. When the signal is transmitted, the transmitting/receiving switch is switched to a transmitting position, sound is converted into an audio signal through the sound input module and enters the ARM, the audio signal output by the ARM is converted into a high-frequency signal through the modulator, and the high-frequency signal is amplified through the high-frequency amplifier and then transmitted out through the antenna.
To sum up, the beneficial effects of the utility model include: by adopting a duplex communication technology, the sending and receiving of communication data can be synchronously and alternately carried out in the communication process without mutual influence, and the called voice and communication information can be answered while the calling process is carried out, so that the synchronism and timeliness of the communication information are ensured; and by adopting a secondary frequency conversion scheme, compared with single frequency conversion, the filtering is added once, the clutter immunity is stronger, and a high-frequency signal received by the antenna becomes a fixed intermediate frequency after being mixed, and is amplified, so that the signal receiving sensitivity is improved.
The technical scope of the present invention is not limited to the content in the above description, and those skilled in the art can make various modifications and alterations to the above embodiments without departing from the technical spirit of the present invention, and these modifications and alterations should fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a signal processing apparatus based on analog radio, its characterized in that, includes DSP treater, tuned circuit, transmission/receiving switch, band pass filter, antenna, high frequency amplifier, buffer amplifier, modulator, ARM, sound output module and sound input module, the antenna links to each other with band pass filter, band pass filter links to each other with transmission/receiving switch, transmission/receiving switch both ends link to each other with tuned circuit and high frequency amplifier respectively, tuned circuit links to each other with the DSP treater, high frequency amplifier links to each other with DSP treater and ARM through buffer amplifier and modulator respectively, ARM and DSP treater to be connected with speaker and microphone through sound output module and sound input module respectively.
2. The analog radio-based signal processing apparatus of claim 1, wherein the tuning circuit comprises a filter amplifier, a mixer, an intermediate frequency amplifier, a double conversion filter, a demodulator, and a local oscillator, the filter amplifier, the mixer, the intermediate frequency amplifier, the double conversion filter, and the demodulator are connected in sequence, and the local oscillator is connected to the mixer.
3. The analog radio-based signal processing apparatus of claim 1, wherein the ARM is connected to a power source via a DC-DC circuit.
4. The analog radio-based signal processing apparatus as claimed in claim 1, wherein the frequency range of the antenna is 156-162 MHZ.
5. An analog station based signal processing apparatus as claimed in claim 1, wherein the modulator model is U2790B-MFP and the high frequency amplifier model is TGA 4040.
6. An analog radio based signal processing apparatus as claimed in claim 1, wherein the DSP processor model is STM32H750XBH6 and the ARM model is STM32F030R8T 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120751171.3U CN214429543U (en) | 2021-04-13 | 2021-04-13 | Signal processing device based on analog radio station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120751171.3U CN214429543U (en) | 2021-04-13 | 2021-04-13 | Signal processing device based on analog radio station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214429543U true CN214429543U (en) | 2021-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120751171.3U Active CN214429543U (en) | 2021-04-13 | 2021-04-13 | Signal processing device based on analog radio station |
Country Status (1)
| Country | Link |
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| CN (1) | CN214429543U (en) |
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2021
- 2021-04-13 CN CN202120751171.3U patent/CN214429543U/en active Active
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