CN216122434U - Portable equipment for suppressing signal interference of digital interphone - Google Patents
Portable equipment for suppressing signal interference of digital interphone Download PDFInfo
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- CN216122434U CN216122434U CN202122112486.6U CN202122112486U CN216122434U CN 216122434 U CN216122434 U CN 216122434U CN 202122112486 U CN202122112486 U CN 202122112486U CN 216122434 U CN216122434 U CN 216122434U
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Abstract
The utility model provides an equipment of suppression is disturbed to digital intercom signal, portable equipment is integration host computer, and integration host computer includes SDR receiving and dispatching integration module, DMR and monitors demodulation module, receiving terminal, transmitting terminal, mainboard module and power conversion module, mainboard module monitors demodulation module through the USB line and DMR and is connected, mainboard module passes through the network and is connected with SDR receiving and dispatching integration module. The portable equipment for suppressing the signal interference of the digital interphone overcomes the defect of heavier quality of the current signal interference suppression equipment of the digital interphone, has a radio detection interference technology, can suppress the interference of a plurality of types of digital interphone signals, is small and exquisite in equipment, and is designed in an integrated structure.
Description
Technical Field
The utility model belongs to the field of radio security and particularly relates to equipment for interference suppression of digital interphone signals.
Background
The interphone communication belongs to professional wireless communication, and the interphone can carry out bidirectional communication without any network support. The interphone has unique advantages in the aspects of cluster scheduling, emergency communication, instant communication and the like, and is widely applied to the fields of public security, fire fighting, rescue, petrochemical industry, building construction and the like.
Compared with an analog interphone, the digital interphone has the characteristics of high frequency band utilization rate, high voice quality, good confidentiality, rich additional services and the like, can solve the problem of radio spectrum resource shortage, adapts to the requirement of emergency command and dispatch, and is a necessary trend for development of future interphones. However, the digital interphone can be used without applying for frequency, harmful interference is easily generated on other communication equipment, the receiving quality of useful signals is reduced, and normal communication is influenced or even blocked. Therefore, monitoring and management of the digital walkie-talkie must be enhanced.
Because the digital interphone signal has the characteristics of intermittence, mobility and instantaneity, the signal source needs to be judged by intercepting and capturing the voice content during monitoring.
SUMMERY OF THE UTILITY MODEL
The utility model provides a portable device which can suppress interference of signals of a plurality of digital interphones, is small and exquisite in device and is designed in an integrated structure.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
the utility model provides an equipment that disturbs suppression is carried out to digital interphone signal, portable equipment is integrated host computer, and integrated host computer includes SDR receiving and dispatching integration module, DMR monitor demodulation module, receiving terminal, transmitting terminal, mainboard module and power conversion module, the mainboard module is connected with DMR monitor demodulation module through the USB line, the mainboard module passes through the network and is connected with SDR receiving and dispatching integration module, power conversion module all monitors demodulation module, mainboard module with DMR and is connected, and power conversion module passes through power filter and is connected with external power source.
Preferably, the SDR transceiver module includes a transmitting part and a receiving part, the DMR monitoring and demodulating module includes a receiving part, the receiving part is connected to the receiving part of the SDR transceiver module and the receiving part of the DMR monitoring and demodulating module through a combiner, and the transmitting part is connected to the transmitting part of the SDR transceiver module through a power amplifying component.
Preferably, the mainboard module is provided with a display screen module, a network port and a USB interface, the network port is connected with the SDR transceiver integrated module through a network, and the USB interface is connected with the DMR monitoring and demodulating module through a USB cable.
Preferably, the SDR transceiver module comprises a ZYNQ7100 and an ADRV9009, the ZYNQ7100 is a product of an ARM Cortex-a9 series processor and a high-performance FPGA tightly combined in a single chip, and the ZYNQ7100 comprises two functional blocks, namely a PS part and a PL part: namely the SOC part and the FPGA part of the ARM.
Preferably, the ADRV9009 is a highly integrated radio frequency transceiver, provides dual channel transmitter and receiver, an integrated frequency synthesizer and digital signal processing functions, has a frequency tuning range of 75MHz to 6000MHz, and has diversified high performance and low power consumption combinations.
Preferably, the ADRV9009 comprises: the receiving path consists of two independent wide bandwidth, direct conversion receivers, the received signal is digitized by a set of four high dynamic range, continuous time sigma-delta ADCs with inherent anti-aliasing characteristics, the transmitter employs a direct conversion modulator, the maximum tunable transmitter synthesis bandwidth is 450MHz, the observation receiver path consists of one wide bandwidth, direct conversion receiver, has a first class dynamic range, and the maximum observation receiver bandwidth is 450 MHz.
Preferably, the DMR monitoring and demodulating module is designed by adopting a DSP + FPGA + AD9361 architecture, and the DSP is responsible for DMR channel decoding, DMR protocol parsing, voice decoding, and other tasks, and provides a USB3.0 interface upload decoding result to the outside; the FPGA is responsible for collecting baseband IQ signals, carrying out channel selection in a digital domain and carrying out demodulation tasks on the collected signals; and the AD9361 completes the receiving of the air digital interphone signal, and the signal is transmitted from the down-conversion to the baseband signal and is sent to the FPGA for demodulation.
Preferably, the power conversion module comprises a synchronous rectification LT8610AB, a P-channel MOS, an NPN and a control signal which are connected in sequence, and the 28V direct current is converted into 12V direct current through the synchronous rectification LT8610AB and the P-channel MOS and is transmitted to the DMR monitoring demodulation module and the SDR transceiver integrated module.
Preferably, the power amplification component comprises a control unit, a preamplifier stage, a driver stage and a final amplifier stage which are connected in sequence, wherein the control unit comprises over-temperature detection, RF switch control, input excitation detection, power shutdown and amplification, standing wave detection, standing wave alarm output, over-excitation alarm input and over-temperature alarm.
Compared with the prior art, the portable equipment for suppressing the signal interference of the digital interphone overcomes the defect that the existing equipment for suppressing the signal interference of the digital interphone has heavier quality, has a radio detection interference technology, can suppress the interference of a plurality of types of digital interphone signals, is small and exquisite in equipment, and is designed in an integrated structure.
Drawings
Fig. 1 is a block diagram of a portable device for suppressing signal interference of a digital interphone according to the present invention.
Fig. 2 is a functional block diagram of an ADRV9009 of a portable device for digital interphone signal interference mitigation according to the present invention.
Fig. 3 is a schematic block diagram of a DMR monitoring and demodulating module of a portable device for suppressing signal interference of a digital interphone according to the present invention.
Fig. 4 is a schematic block diagram of a power conversion module of a portable device for suppressing signal interference of a digital interphone according to the present invention.
Fig. 5 is a schematic block diagram of a portable device power amplification assembly for digital walkie-talkie signal interference mitigation in accordance with the present invention.
Fig. 6 is a flow chart of a portable device interference method for suppressing signal interference of a digital interphone according to the present invention.
Detailed Description
The utility model is described in further detail below with reference to the accompanying examples.
As shown in fig. 1: the portable device for suppressing the signal interference of the digital interphone is an integrated host, and the integrated host comprises an SDR (standard definition radio) receiving and transmitting integrated module, a DMR (digital mobile radio) monitoring and demodulating module, a receiving end, a transmitting end, a mainboard module and a power supply conversion module. The main board module is connected with the DMR monitoring and demodulating module through a USB line, the main board module is connected with the SDR receiving and sending integrated module through a network, the power supply conversion module is connected with the DMR monitoring and demodulating module and the main board module, and the power supply conversion module is connected with an external power supply through a power supply filter. The receiving end is connected with the receiving part of the SDR transceiving integrated module and the receiving part of the DMR monitoring and demodulating module through a combiner, and the transmitting end is connected with the transmitting part of the SDR transceiving integrated module through a power amplification component. The mainboard module is provided with a display screen module, a network port and a USB interface. The network port is connected with the SDR receiving and transmitting integrated module through a network, and the USB interface is connected with the DMR monitoring and demodulating module through a USB line.
The integrated host machine is the core of the DMR digital interphone monitoring and suppressing system and mainly achieves the functions of antenna signal receiving and demodulating, interference suppressing signal generating, power amplifying assembly controlling and the like.
The SDR transceiver module comprises ZYNQ7100 and ADRV9009, wherein the ZYNQ7100 is a product which is provided by Xilinx company and tightly combines a high-performance ARM Cortex-A9 series processor and a high-performance FPGA in a single chip. The ZYNQ series are characterized in that a complete ARM Processing Subsystem (PS) is contained in the FPGA, each ZYNQ series processor contains a Cortex-A9 processor, the whole processor is built by centering on the processor, a memory controller and a large number of peripheral components are integrated in the processor subsystem, so that a core of the Cortex-A9 is completely independent of a programmable logic unit in the ZYNQ7100, a programmable logic unit Part (PL) is not used for the moment, and the ARM processor subsystem can also work independently and is essentially different from the traditional FPGA. ZYNQ comprises two major functional blocks of a PS part and a PL part: namely the SOC part and the FPGA part of the ARM.
As shown in fig. 2: the ADRV9009 is a high-integration-level radio frequency transceiver, provides a dual-channel transmitter and receiver, an integrated frequency synthesizer and a digital signal processing function, has a frequency tuning range of 75MHz-6000MHz, has diversified high-performance and low-power-consumption combination, and can meet the application requirements of 3G, 4G and 5G macrocell Time Division Duplex (TDD) base stations. The internal functional block diagram and the performance characteristics are as follows:
the receive path consists of two independent wide bandwidth, direct conversion receivers with a first order of dynamic range.
In addition to Automatic Gain Control (AGC), ADRV9009 has a flexible external gain control mode and great flexibility in dynamically setting system-level gain.
The received signal is digitized by a set of four high dynamic range, continuous-time sigma-delta ADCs with inherent anti-aliasing properties.
The transmitter adopts a direct frequency conversion modulator, high modulation precision and extremely low noise can be realized, and the synthetic bandwidth of the maximum tunable transmitter is 450 MHz.
The observation receiver path consists of a wide bandwidth, direct conversion receiver with a first order dynamic range and a maximum observation receiver bandwidth of 450 MHz.
A fully integrated Phase Locked Loop (PLL) can provide high performance, low power fractional-N RF frequency synthesis for both the Transmitter (TX) and Receiver (RX) signal paths. The received signal is digitized by a set of four high dynamic range, continuous-time sigma-delta ADCs with inherent anti-aliasing properties.
The high-speed JESD204B interface supports lane rates up to 12.288Gbps, achieving two lanes per transmitter and a single lane per receiver at maximum bandwidth.
The core of the ADRV9009 can be powered directly from a 1.3V to a 1.8V regulator and controlled through a standard four-wire serial port.
As shown in fig. 3: the DMR monitoring and demodulating module is designed by adopting a DSP + FPGA + AD9361 architecture. The DSP is responsible for tasks such as DMR channel decoding, DMR protocol analysis, voice decoding and the like, and provides a USB3.0 interface for uploading a decoding result; the FPGA is responsible for collecting baseband IQ signals, carrying out channel selection in a digital domain and carrying out demodulation tasks on the collected signals; and the AD9361 completes the receiving of the air digital interphone signal, and the signal is down converted to a baseband signal and transmitted to the FPGA for demodulation.
As shown in fig. 4: the power conversion module is mainly used for converting the direct current +28V into various direct current voltages required by equipment. The power conversion module comprises a synchronous rectification LT8610AB, a P-channel MOS, an NPN and a control signal which are sequentially connected, and 28V direct current is converted into 12V direct current through the synchronous rectification LT8610AB and the P-channel MOS and is transmitted to the DMR monitoring demodulation module and the SDR transceiving integrated module. The direct current +28V is used for supplying power to the power amplification component through the controlled electronic switch, and the port is designed with an overcurrent detection function. If the power amplification component has an overcurrent abnormal phenomenon, the controlled electronic switch is turned off and locked, and power cannot be supplied until the power amplification component is recovered to be normal, and the power supply can not be recovered to be normal by restarting the equipment.
As shown in fig. 5: the power amplification component is used for amplifying and outputting the interference suppression signal and comprises a control unit, a preamplifier stage, a pushing stage and a final amplifier stage which are sequentially connected, wherein the control unit comprises over-temperature detection, RF switch control, input excitation detection, power off amplification, standing wave detection, output standing wave alarm, input over-excitation alarm and over-temperature alarm. The power amplification assembly can be selected and matched according to the requirements of interference distance and interference-to-interference ratio, the interior of the power amplification assembly is realized by adopting a control circuit and a three-stage amplification circuit, a whip antenna is arranged in the power amplification assembly and used for receiving and transmitting signals, and a sucker base and a low-loss 3-5m radio frequency cable are arranged at the tail part of the whip antenna to ensure flexible installation. The whip antenna has the ultra-wideband working characteristic, has good omni-directionality in the full frequency band, is integrated with receiving and transmitting, and has the transmitting power of more than 100W.
As shown in fig. 6: under unattended operation, the portable equipment for suppressing the signal interference of the digital interphone automatically carries out signal monitoring processing after being powered on. And performing full-band spectrum scanning after the template is established, and once capturing abnormal signals, performing priority arrangement by combining the levels and the occurrence times of the abnormal signals, and then performing subsequent signal analysis, demodulation and monitoring processing. The unattended operation comprises an automatic monitoring mode and an automatic monitoring pressure manufacturing worker.
Under unattended operation, the interference method comprises the following steps:
establishing a template, scanning a frequency spectrum, detecting abnormal signals, analyzing and identifying signals, judging whether the signals belong to a known signal pattern, if so, further judging whether the signals are DMR, and if not, restarting the abnormal signal detection.
If the DMR signal is the DMR signal, the signal frequency is sent to a DMR demodulation monitoring module, the DMR demodulation monitoring module demodulates and decodes the DMR signal, and the DMR demodulation monitoring module uploads a demodulation code result and sends an interference suppression signal.
If not, sending the signal frequency to the conventional communication signal for demodulation, and uploading the demodulation decoding result.
The portable equipment for suppressing the signal interference of the digital interphone overcomes the defect of heavier quality of the current signal interference suppression equipment of the digital interphone, has a radio detection interference technology, can suppress the interference of a plurality of types of digital interphone signals, is small and exquisite in equipment, and is designed in an integrated structure.
The portable equipment for suppressing the signal interference of the digital interphone has the following advantages and beneficial effects: the utility model provides the interference of any frequency in the frequency band of the digital interphone, and supports the simultaneous realization of the multi-target interference capability in the frequency band.
Finally, it should be noted that: the above examples are merely illustrative of the technical solutions of the present invention, and not limitative thereof; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a portable equipment to suppression of digital interphone signal interference which characterized in that, portable equipment to suppression of digital interphone signal interference is integrated host computer, and integrated host computer includes SDR receiving and dispatching integration module, DMR and monitors demodulation module, receiving terminal, transmitting terminal, mainboard module and power conversion module, the mainboard module is connected with DMR through the USB line and monitors demodulation module, the mainboard module is connected with SDR receiving and dispatching integration module through the network, power conversion module all monitors demodulation module, mainboard module with DMR and is connected, and power conversion module passes through power filter and is connected with external power source.
2. The portable device for digital interphone signal interference mitigation as claimed in claim 1, wherein the SDR transceiver module comprises a transmitter and a receiver, the DMR monitor and demodulator module comprises a receiver, the receiver is connected to the receiver of the SDR transceiver module and the receiver of the DMR monitor and demodulator module through a combiner, and the transmitter is connected to the transmitter of the SDR transceiver module through a power amplifier.
3. The portable device for suppressing signal interference of a digital interphone according to claim 2, wherein the main board module is provided with a display screen module, a network port and a USB interface, the network port is connected with the SDR transceiver module through a network, and the USB interface is connected with the DMR monitor and demodulation module through a USB cable.
4. The portable device for digital interphone signal interference suppression as recited in claim 1, wherein the SDR transceiver-integrated module comprises ZYNQ7100 and ADRV9009, the ZYNQ7100 is a product of ARM Cortex-A9 series processor and high performance FPGA tightly combined in a single chip, the ZYNQ7100 comprises two major functional blocks of PS part and PL part: namely the SOC part and the FPGA part of the ARM.
5. The portable device for digital interphone signal interference mitigation as claimed in claim 4, wherein the ADRV9009 is a high integration radio frequency transceiver providing dual channel transmitter and receiver, integrated frequency synthesizer and digital signal processing function, frequency tuning range is 75MHz-6000MHz, and has diversified high performance and low power consumption combination.
6. The portable device for digital interphone signal interference mitigation according to claim 5, characterized in that said ADRV9009 comprises: the receiving path consists of two independent wide bandwidth, direct conversion receivers, the received signal is digitized by a set of four high dynamic range, continuous time sigma-delta ADCs with inherent anti-aliasing characteristics, the transmitter employs a direct conversion modulator, the maximum tunable transmitter synthesis bandwidth is 450MHz, the observation receiver path consists of one wide bandwidth, direct conversion receiver, has a first class dynamic range, and the maximum observation receiver bandwidth is 450 MHz.
7. The portable device for digital interphone signal interference mitigation as claimed in claim 1, wherein the power conversion module comprises a synchronous rectifier LT8610AB, a P-channel MOS, an NPN and a control signal connected in sequence, and the 28V dc is converted into 12V dc by the synchronous rectifier LT8610AB and the P-channel MOS and then transmitted to the DMR monitoring demodulation module and the SDR transceiver integrated module.
8. The portable device for digital interphone signal interference mitigation as claimed in claim 2, wherein the power amplification module comprises a control unit, a preamplifier stage, a booster stage and a final amplifier stage connected in sequence, the control unit comprising over temperature detection, RF switch control, input excitation detection, power off amplifier, standing wave detection, output standing wave alarm, input over excitation alarm and over temperature alarm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122112486.6U CN216122434U (en) | 2021-09-02 | 2021-09-02 | Portable equipment for suppressing signal interference of digital interphone |
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| CN202122112486.6U CN216122434U (en) | 2021-09-02 | 2021-09-02 | Portable equipment for suppressing signal interference of digital interphone |
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| CN216122434U true CN216122434U (en) | 2022-03-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114915354A (en) * | 2022-05-10 | 2022-08-16 | 浙江嘉科电子有限公司 | Radio frequency signal acquisition playback system and method capable of being configured as unattended operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114915354A (en) * | 2022-05-10 | 2022-08-16 | 浙江嘉科电子有限公司 | Radio frequency signal acquisition playback system and method capable of being configured as unattended operation |
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Denomination of utility model: A portable device for suppressing interference in digital intercom signals Effective date of registration: 20230809 Granted publication date: 20220322 Pledgee: Zhejiang Tailong commercial bank Taizhou branch of Limited by Share Ltd. Pledgor: Shenghang (Taizhou) Technology Co.,Ltd. Registration number: Y2023980051435 |