CN111953377B - Control system for built-in pre-post selector of no-load short-wave radio station - Google Patents
Control system for built-in pre-post selector of no-load short-wave radio station Download PDFInfo
- Publication number
- CN111953377B CN111953377B CN202010841931.XA CN202010841931A CN111953377B CN 111953377 B CN111953377 B CN 111953377B CN 202010841931 A CN202010841931 A CN 202010841931A CN 111953377 B CN111953377 B CN 111953377B
- Authority
- CN
- China
- Prior art keywords
- unit
- post
- control unit
- main control
- radio frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
Abstract
The invention discloses a control system of a pre-post selector in a no-load short-wave radio station, wherein the pre-post selector unit is arranged in a short-wave power amplifier, and the control system comprises a power amplifier control unit, an R/E main control unit, a radio frequency transceiving switch unit and a power amplification unit. The invention reduces the volume and the weight of the short-wave radio station through the integrated control design of the pre-post selector in a built-in mode, can realize the digital tuning narrow-band filtering in a short-wave radio frequency channel, improves the receiving and transmitting performance indexes of no-load short-wave radio station communication, and further improves the electromagnetic compatibility index.
Description
Technical Field
The invention belongs to the technical field of communication electronic circuits, and particularly relates to a control technology of a pre-post selector of a no-load short-wave radio station.
Background
In the conventional idle short wave radio station, an external LRU (line replaceable unit) is often used as a post selector unit. The external pre-post selector unit is connected with the short-wave radio transceiver through 1 low-frequency control cable and 2 radio-frequency cables. The external pre-post selector unit occupies a large physical space, the weight is large, and the problems of weight increase and electromagnetic compatibility are also brought by the interconnection cables.
Disclosure of Invention
In order to solve the technical problems mentioned in the background technology, the invention provides a control system of a pre-post selector built in an unloaded short-wave radio station.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a control system of a pre-post selector built in a no-load short-wave radio station is characterized in that a pre-post selector unit is arranged in a short-wave power amplifier and comprises a power amplifier control unit, an R/E main control unit, a radio frequency transceiving switch unit and a power amplification unit; the R/E main control unit transmits the receiving and sending state and frequency information to the power amplifier control unit, and the power amplifier control unit processes the information transmitted by the R/E main control unit and then sets working frequency and pre-selection/post-selection control parameters to the pre-selector unit; when the radio station is in a receiving state, the radio frequency transceiving switch unit transmits a radio frequency signal received by the antenna to the pre-post selector unit, the pre-post selector unit is in a pre-selection state, the pre-post selector unit performs low-noise amplification and narrow-band filtering processing on the radio frequency signal transmitted by the radio frequency transceiving switch unit, then transmits the processed signal to the R/E main control unit, and the R/E main control unit processes the signal transmitted by the pre-post selector unit to obtain a required service signal; when the radio station is in a transmitting state, the R/E main control unit generates a radio frequency excitation signal required by short wave transmission according to communication services and parameters and transmits the radio frequency excitation signal to the pre-post selector unit, the pre-post selector unit is in a post-selection state, the pre-post selector unit sequentially amplifies, narrow-band filters and re-amplifies the radio frequency excitation signal transmitted by the R/E main control unit and transmits the processed signal to the power amplification unit, and the power amplification unit performs power amplification on the signal transmitted by the pre-post selector unit and amplifies the signal to a rated power required by the radio station.
Furthermore, the power amplifier control unit adopts an FPGA module, and the pre-post selector unit adopts an MCU module; the FPGA module and the R/E main control unit are in signal transmission through an RS485 serial port; and the MCU module and the FPGA module transmit frequency control codes through TTL level asynchronous serial ports.
Furthermore, a tuning band-pass filter, a signal intensity detection circuit and an A/D converter are sequentially arranged between the MCU module and the FPGA module; the radio frequency input and output signals of the tuning band-pass filter are sent to a signal intensity detection circuit, the signal intensity detection circuit converts effective values of the radio frequency input and output signals into direct-current voltage signals, the direct-current voltage signals are sent to an FPGA module through an A/D converter to be processed, and the FPGA module reports the radio frequency input and output signal intensities of the pre-and post-selector unit to an R/E main control unit for self-checking.
Furthermore, the FPGA module generates reset pulse after processing according to the receiving and sending state and frequency information transmitted by the R/E main control unit through the RS485 serial port, the reset pulse is used for waking up the MCU module to start working, and then a frequency control code is transmitted to the MCU module through the TTL level asynchronous serial port; the FPGA module checks after receiving the frequency control code returned by the MCU module, if the returned data is consistent with the sent data, the communication is successful, and the MCU module enters a sleep mode; if the returned data is inconsistent with the sent data, the communication is failed, reset pulses are repeatedly generated again, the MCU module is awakened to start working, a frequency control code is sent to the MCU module, if the returned data is not checked correctly or cannot be received for 3 times continuously, the control failure of the post selector unit is judged, and the FPGA module reports a message of the control failure of the post selector unit to the R/E main control unit through the RS485 serial port.
Adopt the beneficial effect that above-mentioned technical scheme brought:
the invention reduces the volume and the weight of the short-wave radio station through the integrated control design of the pre-post selector in a built-in mode, can realize the digital tuning narrow-band filtering in a short-wave radio frequency channel, improves the receiving and transmitting performance indexes of no-load short-wave radio station communication, and further improves the electromagnetic compatibility index.
The invention can realize the function integration of the short-wave radio station pre-post selector, the short-wave power amplifier and the receiving-transmitting conversion through the built-in integrated design and the real-time control and check mechanism, realizes the coordination work of the short-wave radio station pre-post selector, the short-wave power amplifier and the receiving radio frequency channel, effectively improves the emission spurious suppression and the broadband noise, improves the anti-blocking performance of a receiver, out-of-band intermodulation indexes, reduces the spurious response and the like.
The invention adopts a universal FPGA as a main control party of the built-in pre-post selector, and a universal MCU as a controlled party of the built-in pre-post selector. In order to avoid interference of various clock signals to a radio frequency channel of a short wave radio station receiver when an MCU in a built-in pre-post selector operates, an MCU reset wake-up and sleep circuit is adopted, a main control party firstly sends a wake-up pulse before controlling the built-in pre-post selector to enable the MCU of a controlled party to start working, and the MCU enters a sleep mode after finishing communication with the main control party and control over a tuning filter unit, so that various clock signals are prevented from being coupled to the radio frequency channel of the short wave radio station receiver when the MCU operates. The built-in pre-post selector is also designed with 2 paths of analog signals of radio frequency input/output signal intensity for the main controller to use the self-checking action of whether the built-in pre-post selector unit works normally.
Drawings
FIG. 1 is a schematic diagram of the control system of the present invention;
FIG. 2 is an original control diagram of the preselector according to the present invention;
FIG. 3 is a control flow chart of the present invention.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
In the invention, the post-selector unit is arranged in the short-wave power amplifier, the power amplifier bottom plate and the post-selector unit replace an external low-frequency cable through a PCB connector without a conducting wire, and 2 radio-frequency cables are all very short in a case. The invention relates to a control system of a pre-post selector in a no-load short wave radio station, which comprises a power amplifier control unit, an R/E main control unit, a radio frequency transceiving switch unit and a power amplification unit, as shown in figure 1. The R/E main control unit transmits the receiving and sending state and frequency information to the power amplifier control unit, and the power amplifier control unit processes the information transmitted by the R/E main control unit and then sets the working frequency and pre-selection/post-selection control parameters to the pre-selection unit and the post-selection unit. When the radio station is in a receiving state, the radio frequency transceiving switch unit transmits radio frequency signals received by the antenna to the pre-post selector unit, the pre-post selector unit is in a pre-selection state, the pre-post selector unit performs low-noise amplification and narrow-band filtering processing on the radio frequency signals transmitted by the radio frequency transceiving switch unit, then transmits the processed signals to the R/E main control unit, and the R/E main control unit processes the signals transmitted by the pre-post selector unit to obtain required service signals. When the radio station is in a transmitting state, the R/E main control unit generates a radio frequency excitation signal required by short wave transmission according to communication services and parameters and transmits the radio frequency excitation signal to the pre-post selector unit, the pre-post selector unit is in a post-selection state, the pre-post selector unit sequentially amplifies, narrow-band filters and re-amplifies the radio frequency excitation signal transmitted by the R/E main control unit and transmits the processed signal to the power amplification unit, and the power amplification unit performs power amplification on the signal transmitted by the pre-post selector unit and amplifies the signal to a rated power required by the radio station.
As shown in fig. 2, the preselector is mainly implemented by using a hardware architecture of FPGA (main control party) + MCU (controlled party). The power amplifier control unit adopts an FPGA module. The pre-post selector unit adopts an MCU module. And the FPGA module and the R/E main control unit are in signal transmission through an RS485 serial port. And the MCU module and the FPGA module transmit frequency control codes through TTL level asynchronous serial ports. In the present embodiment, the main control party FPGA employs EP3C25F256I 7. The RS485 high-speed serial port adopts full-duplex RS485 differential signals, and the baud rate is 3.125 Mbps. The controlled MCU adopts an 8-bit Atmega644 series singlechip. The TTL level asynchronous serial port is full duplex, the Baud rate is 115200bps, and the reset pulse is a low-level pulse of 1-2 ms.
As shown in fig. 3, the main control party FPGA generates a reset pulse after processing according to the information such as the receiving and sending status, the frequency, etc. sent from the R/E main control unit through the RS485 high-speed serial port, and is used for waking up the MCU to start working, and then sends 8-byte frequency control codes with the resolution of 1kHz through the TTL level asynchronous serial port. After receiving the frequency control code, the MCU of the controlled party sets a band control signal of a tuning band-pass filter and a control signal of a tuning loop capacitor bank, writes tuning data mapped by the frequency point into an RAM of an external SPI (serial peripheral interface) through the SPI, sets default tuning control data after the frequency point is reset next time, and then sends the received 8-byte frequency control code to the FPGA of the main controlling party through a TTL level asynchronous serial port.
The master control party FPGA checks after receiving the 8-byte frequency control code returned by the controlled party MCU, if the returned data is consistent with the sent data, the communication is successful, and the controlled party MCU then powers off the crystal oscillator control circuit and enters a sleep mode; if the returned data is inconsistent with the sent data, the communication is failed, reset pulses are repeatedly generated again, the MCU is awakened to start working, the frequency control code is sent, if the returned data is not checked correctly or cannot be received for 3 times continuously, the control failure of the post selector unit is judged, and the FPGA of the main control party reports the control failure message of the post selector unit to the R/E main control unit through the RS485 high-speed serial port.
The radio frequency input and output signals of the tuning band-pass filter are sent to a signal intensity detection circuit, the signal intensity detection circuit converts effective values of the radio frequency input and output signals into direct current voltage signals, and the direct current voltage signals are sent to the FPGA for processing after A/D conversion. And the FPGA reports the radio frequency input signal intensity and the radio frequency output signal intensity of the pre-selector unit to the R/E main control unit through the RS485 high-speed serial port for self-checking.
The embodiments are only for illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited thereto, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the scope of the present invention.
Claims (3)
1. The utility model provides a built-in preceding post-selector control system of no-load short wave radio station which characterized in that: the pre-post selector unit is arranged in the short wave power amplifier, and the control system comprises a power amplifier control unit, an R/E main control unit, a radio frequency transceiving switch unit and a power amplification unit; the R/E main control unit transmits the receiving and sending state and frequency information to the power amplifier control unit, and the power amplifier control unit processes the information transmitted by the R/E main control unit and then sets working frequency and pre-selection/post-selection control parameters to the pre-selector unit; when the radio station is in a receiving state, the radio frequency transceiving switch unit transmits a radio frequency signal received by the antenna to the pre-post selector unit, the pre-post selector unit is in a pre-selection state, the pre-post selector unit performs low-noise amplification and narrow-band filtering processing on the radio frequency signal transmitted by the radio frequency transceiving switch unit, then transmits the processed signal to the R/E main control unit, and the R/E main control unit processes the signal transmitted by the pre-post selector unit to obtain a required service signal; when the radio station is in a transmitting state, the R/E main control unit generates a radio frequency excitation signal required by short wave transmission according to communication services and parameters and transmits the radio frequency excitation signal to the pre-post selector unit, the pre-post selector unit is in a post-selection state, the pre-post selector unit sequentially amplifies, narrow-band filters and re-amplifies the radio frequency excitation signal transmitted by the R/E main control unit and transmits the processed signal to the power amplification unit, and the power amplification unit amplifies the power of the signal transmitted by the pre-post selector unit to the rated power required by the radio station; the power amplifier control unit adopts an FPGA module, and the pre-post selector unit adopts an MCU module; the FPGA module and the R/E main control unit are in signal transmission through an RS485 serial port; and the MCU module and the FPGA module transmit frequency control codes through TTL level asynchronous serial ports.
2. The control system of the built-in pre-post selector of the no-load short-wave radio station as claimed in claim 1, wherein: a tuning band-pass filter, a signal intensity detection circuit and an A/D converter are sequentially arranged between the MCU module and the FPGA module; the radio frequency input and output signals of the tuning band-pass filter are sent to a signal intensity detection circuit, the signal intensity detection circuit converts effective values of the radio frequency input and output signals into direct-current voltage signals, the direct-current voltage signals are sent to an FPGA module through an A/D converter to be processed, and the FPGA module reports the radio frequency input and output signal intensities of the pre-and post-selector unit to an R/E main control unit for self-checking.
3. The control system of the built-in pre-post selector of the no-load short-wave radio station as claimed in claim 2, wherein: the FPGA module generates reset pulse after processing according to the receiving and sending state and frequency information transmitted by the R/E main control unit through the RS485 serial port, the reset pulse is used for awakening the MCU module to start working, and then transmits a frequency control code to the MCU module through the TTL level asynchronous serial port; the FPGA module checks after receiving the frequency control code returned by the MCU module, if the returned data is consistent with the sent data, the communication is successful, and the MCU module enters a sleep mode; if the returned data is inconsistent with the sent data, the communication is failed, reset pulses are repeatedly generated again, the MCU module is awakened to start working, a frequency control code is sent to the MCU module, if the returned data is not checked correctly or cannot be received for 3 times continuously, the control failure of the post selector unit is judged, and the FPGA module reports a message of the control failure of the post selector unit to the R/E main control unit through the RS485 serial port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010841931.XA CN111953377B (en) | 2020-08-20 | 2020-08-20 | Control system for built-in pre-post selector of no-load short-wave radio station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010841931.XA CN111953377B (en) | 2020-08-20 | 2020-08-20 | Control system for built-in pre-post selector of no-load short-wave radio station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111953377A CN111953377A (en) | 2020-11-17 |
| CN111953377B true CN111953377B (en) | 2022-03-04 |
Family
ID=73358741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010841931.XA Expired - Fee Related CN111953377B (en) | 2020-08-20 | 2020-08-20 | Control system for built-in pre-post selector of no-load short-wave radio station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111953377B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202007013414U1 (en) * | 2007-05-04 | 2008-09-18 | Weatherdock Ag | Special switch for connection of a VHF radio, a Class B AIS transmitter and other possible standard receivers to an antenna |
| CN201436791U (en) * | 2009-06-17 | 2010-04-07 | 广州市圣大电子有限公司 | Frequency hopping power amplification system |
| CN202798694U (en) * | 2012-08-15 | 2013-03-13 | 宝鸡烽火诺信科技有限公司 | Short wave rear selector |
| CN204721355U (en) * | 2015-06-25 | 2015-10-21 | 国庆锋 | A kind of radio station launch control system |
| CN106506039B (en) * | 2016-12-13 | 2019-05-03 | 宝鸡烽火诺信科技有限公司 | Device control system is selected in a kind of shortwave prognosis |
| CN106712805A (en) * | 2016-12-30 | 2017-05-24 | 陕西烽火电子股份有限公司 | Shortwave pre-post selector |
| CN209627338U (en) * | 2019-05-21 | 2019-11-12 | 成都中亚通茂科技股份有限公司 | A kind of high low pass combination preselection filter |
| CN110601712A (en) * | 2019-09-12 | 2019-12-20 | 陕西烽火诺信科技有限公司 | Control system of short-wave pre-post selector |
| CN210201832U (en) * | 2019-09-12 | 2020-03-27 | 陕西烽火诺信科技有限公司 | Control system of short-wave pre-post selector |
-
2020
- 2020-08-20 CN CN202010841931.XA patent/CN111953377B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN111953377A (en) | 2020-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206133244U (en) | Electronic equipment with dormancy waking function | |
| CN111917424B (en) | Low-emission broadband noise no-load short-wave radio station and implementation method thereof | |
| CN107911139A (en) | The wireless telecommunication system and method for a kind of implantable medical devices | |
| CN201123066Y (en) | Wireless monitoring system with wireless monitoring and security function | |
| CN111953377B (en) | Control system for built-in pre-post selector of no-load short-wave radio station | |
| CN109150224A (en) | Wireless signal transceiver and its energy-saving control method | |
| EP0355973A2 (en) | Digital mobile phone | |
| CN209673988U (en) | A kind of high intermediate frequency Radar Digital Receiver | |
| CN206640572U (en) | It is a kind of that there is the terminal device that hand key report business is realized in short-wave radio set speech channel | |
| CN212909515U (en) | Radio frequency integrated circuit | |
| CN201037954Y (en) | Wireless digital regulator | |
| CN211019113U (en) | Novel elevator intercom system | |
| CN111277525B (en) | Underwater acoustic communication modulation and demodulation module of frequency combination signal | |
| CN217469950U (en) | Controller for realizing automatic frequency selection of short-wave radio station | |
| CN203691349U (en) | Cross-band signal source assembly | |
| CN209462371U (en) | A kind of intercom | |
| CN203165176U (en) | A human body post monitoring device based on heartbeat detection and a human body post monitoring system based on heartbeat detection | |
| CN110493739B (en) | Battery data transmission method of electric water sports equipment | |
| CN101816136B (en) | Method and apparatus for communicating sound wave of human body | |
| CN220108214U (en) | Dual-mode communication module and intelligent gas meter | |
| CN212381405U (en) | Communication circuit of wireless sensor | |
| CN209250631U (en) | 4G rf processing circuitry | |
| CN218998076U (en) | Server serial communication device based on ultrasonic waves | |
| CN213342193U (en) | Anti-interference receiving antenna circuit | |
| CN213817772U (en) | Maritime affairs VHF transceiver based on software radio |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220304 |