CN114866129A - Method for realizing multi-band switching of satellite communication equipment - Google Patents
Method for realizing multi-band switching of satellite communication equipment Download PDFInfo
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- CN114866129A CN114866129A CN202210426458.8A CN202210426458A CN114866129A CN 114866129 A CN114866129 A CN 114866129A CN 202210426458 A CN202210426458 A CN 202210426458A CN 114866129 A CN114866129 A CN 114866129A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
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- 230000010355 oscillation Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
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- 238000010276 construction Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention aims to provide a method for realizing multi-band switching of satellite communication equipment, which has the advantages of simple circuit, more modes and stronger interference resistance. The method comprises the steps of firstly dividing the input voltage to enable the output voltage range to be in accordance with the use of a later-stage analog-to-digital converter, then carrying out analog-to-digital conversion on the output voltage of the divider to convert the analog voltage output by the divider into binary data which can be identified by an MCU and transmitting the binary data to the MCU, wherein the MCU carries out inverse operation on the actual input voltage value according to the output data of the analog-to-digital converter, and then controls a radio frequency unit to carry out corresponding frequency band switching according to the input voltage range value to enable the radio frequency unit to work in a corresponding radio frequency band. The method only adopts one voltage mode, and the precision of analog-to-digital conversion in the method determines the number of the operation mode control which can be actually realized by the circuit.
Description
Technical Field
The invention relates to satellite communication equipment, in particular to a simple method for realizing multi-band switching of satellite communication equipment.
Background
The satellite mobile communication is complementary with a ground communication system by virtue of the advantages of wide coverage range, no influence of geographical conditions and the like, and is widely applied to the field of difficult coverage of the ground communication system or overhigh construction cost.
Based on the advantages, the satellite communication is widely applied to various fields such as fishery administration, water conservancy, disaster relief, exploration, military and the like.
Satellite communication devices are currently moving towards global coverage for one device. Since the operating frequencies of the coverage satellites are different in different countries or regions, the ground device needs to switch the corresponding operating frequency bands in different countries or regions. The antenna feeder passive unit can always work in the full bandwidth range, but for a low noise down converter and a power amplifier power supply at the radio frequency front end, due to the characteristics of the antenna feeder passive unit, the antenna feeder passive unit can only work in a certain specified frequency band. Therefore, in different countries or regions, the rf front-end device needs to be switched to the operating frequency band. However, the conventional current satellite communication equipment basically only performs frequency band switching for the low noise down converter, and the international adopted general mode is to perform control switching by modulating signals of 13V/18V voltage +22KHz, the available states are four in total, and a working principle block diagram of the satellite communication equipment is shown in fig. 1. A frequency band switching principle is set for the front end of the existing device. The modem provides different response logics for the MCU according to different received combinations of 13V/18V +22kHz, and the MCU controls other radio frequency circuits to complete corresponding switching work according to different logics.
However, the prior art has the following defects:
1. logic is finite: the current technology can only provide 4 available logics, and cannot meet the use requirements of equipment with more operation modes.
2. The 22kHz modulation signal is arranged in the control logic and is transmitted together with the clock signal, so that the quality of the clock signal is easily influenced, and the performance of the whole machine is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for realizing multi-band switching of satellite communication equipment, which has the advantages of simple circuit, more modes and stronger anti-interference capability and can be used for realizing multi-band switching of the satellite communication equipment.
In order to solve the technical problem, the application provides the following technical scheme:
the invention relates to a method for realizing multi-band switching of satellite communication equipment, which comprises the steps of dividing input voltage to enable the output voltage range to be in accordance with the use of a later-stage analog-to-digital converter, performing analog-to-digital conversion on the output voltage of a divider to convert analog voltage output by the divider into binary data which can be identified by an MCU (microprogrammed control unit) and transmitting the binary data to the MCU, wherein the MCU performs inverse operation on an actual input voltage value according to the output data of the analog-to-digital converter, and then controls a radio frequency unit to perform corresponding frequency band switching according to the input voltage range value to enable the radio frequency unit to work in a corresponding radio frequency band. The method only adopts one mode of voltage, and the precision of analog-to-digital conversion in the method determines the number of control modes which can be actually realized by the circuit.
The invention relates to a method for realizing multi-band switching of satellite communication equipment, wherein in the method, a multiplexing unit divides an intermediate frequency signal, a clock and a power supply input by a common end of the multiplexing unit. The divider can be composed of a resistor R1, a resistor R2, a capacitor C3 and an operational amplifier Q1, one end of the resistor R1 is connected with the multiplexing unit and power management, the other end of the resistor R1 is connected with the same-direction end of the operational amplifier Q1 and is connected to the ground through the capacitor C3 and the resistor R2 respectively, the different-direction end of the operational amplifier Q1 is connected with an output end out, and the output end out is connected with the MCU through an analog-to-digital converter 3. The divider can realize the following functions:
firstly, dividing the input voltage to make the output voltage range conform to the use of a post-stage analog-to-digital converter;
secondly, protection is provided for the analog-to-digital converter, which is mainly completed by limiting the supply voltage of Q1;
thirdly, the driving capability of the front-stage circuit is improved, which is mainly completed by utilizing the characteristics of high input resistance and low output resistance of Q1
Furthermore, the multiplexing unit may be composed of a capacitor C1, a capacitor C2, an inductor L1, and an inductor L2, and is configured to split an intermediate frequency signal, a clock, and a power supply at the common port, where the intermediate frequency signal is an output signal of the up-converter or an output signal of the down-converter; the clock signal is used for providing a reference clock for a local oscillation unit of the frequency converter; the power supply signal is used for supplying power to the whole product and is used for switching frequency bands.
The input voltage range can be 10V-30V, and after the input voltage is passed through the divider, the output voltage is controlled within 5V or 3.3V. When the analog-to-digital converter is integrated in the MCU, the output voltage range can be 0-3.3V.
Compared with the traditional scheme, the novel scheme has the following advantages:
1. the circuit is simple: the circuit is simpler than before, whether it is a control end or a receiving end. Especially, the receiving end, replace the modem before with 2 divider resistors directly, reuse DA (analog-to-digital conversion) inside MCU to realize;
2. there are more modes: the inventive control scheme, the number of control modes that can be achieved is determined by the DA resolution, theoretically an infinite number of mode switches are possible if the DA resolution is high enough.
3. The clock performance is not affected by the modulation signal.
The method and circuit for implementing multi-band switching of satellite communication equipment according to the present invention will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a prior art functional block diagram;
fig. 2 is a schematic block diagram of a circuit for implementing multi-band handover of satellite communication equipment according to the present invention.
Detailed Description
The invention adopts a new control mode, the mode only has one voltage mode, and can realize the switching of a plurality of frequency bands, the schematic structure block diagram of the invention is shown as figure 2, which is a schematic circuit diagram for realizing the multi-frequency band switching of satellite communication equipment, and mainly comprises: a multiplexing unit 1, a divider 2, an analog-to-digital conversion circuit 3, a power manager 5, a radio frequency unit and an MCU 6. Wherein the radio frequency unit comprises an up-down converter.
The invention mainly controls the product to work in different frequency bands according to different input voltage ranges, and the specific working logic is as follows:
the circuit firstly performs division operation on input voltage, then performs analog-to-digital conversion on output voltage of the divider, the MCU performs inverse operation on an actual input voltage value according to output data of the analog-to-digital converter, and then controls the radio frequency unit to perform corresponding frequency band switching according to the input voltage range value to work in a corresponding radio frequency band.
A multiplexing unit: the multiplexing unit 1 is composed of a capacitor C1, a capacitor C2, an inductor L1 and an inductor L2, and is used for shunting intermediate frequency signals, clocks and power supplies of a common port. The intermediate frequency signal is an output signal of an up converter or an output signal of a down converter; the clock signal is used for providing a reference clock for a local oscillation unit of the frequency converter; the power supply signal is used for supplying power to the whole product and is used for switching frequency bands.
Usually, the frequency range of the intermediate frequency signal is 950MHz to 4000MHz, the frequency range of the clock signal is 10MHz to 100MHz, and the power voltage range is 10V to 30V. Therefore, C1 is usually about 10pF, C2 is usually 0.1uF, L1 is usually 22nH, and L2 is usually 1uH to 10 uH.
The common port is connected with one end of an inductor L1 and one end of a capacitor C1 at the input end of the multiplexing unit 1, and the other end of the capacitor C1 is connected with the radio frequency unit 4 (up-down converter); the other end of the inductor L1 is connected with one end of an inductor L2 and one end of a capacitor C2; the other end of the capacitor C2 is connected with the radio frequency unit 4 to send a clock signal, and the other end of the inductor L2 is respectively connected with the resistor R1 of the divider 2 and the power supply management 5; the power management unit 5 is electrically connected with the multiplexing unit 1, the radio frequency unit 4 and the MCU 6.
A divider:
the divider 2 of the invention is composed of a resistor R1, a resistor R2, a capacitor C3 and an operational amplifier Q1, wherein one end of the resistor R1 is connected with a resistor L2 of the multiplexing unit 1 and the power management 2, the other end of the resistor R1 is connected with the same-direction end of the adder and is respectively connected to the ground through the capacitor C3 and the resistor R2, the capacitor C3 is used for filtering spike interference and can be combined with a software algorithm to filter out misjudgment caused by interference, the reverse end of the operational amplifier Q1 is connected with an output end out, the output end out is connected with an MCU6 through an analog-to-digital converter 3, the MCU6 is connected with the radio frequency unit 4, and the Q1 is an emitter follower at this time and is used for improving the driving capability of the divider and ensuring that the voltage input to the analog-to-digital converter is not influenced by the input impedance of the analog-to-digital converter.
The divider has roughly three roles: firstly, dividing the input voltage to make the output voltage range conform to the use of a post-stage analog-to-digital converter; secondly, protection is provided for the analog-to-digital converter, which is mainly completed by limiting the supply voltage of Q1; and thirdly, the driving capability of a front-stage circuit is improved, which is mainly realized by utilizing the characteristics of high input resistance and low output resistance of Q1.
The input voltage range is usually 10V-30V, after passing through a divider, the output voltage is usually controlled within 5V or 3.3V, and the specific voltage range is selected and determined by a subsequent analog-to-digital converter; in most cases, an analog-to-digital converter integrated in the MCU is directly used, and the output voltage range is usually 0-3.3V.
Analog-to-digital conversion:
the analog-to-digital conversion of the invention is to convert the analog voltage output by the divider 2 into binary data that can be recognized by the MCU and transmit the binary data to the MCU6, for example, if the reference voltage is 3.3V and the number of ADC bits is 10, the accuracy of the analog-to-digital conversion is 3.3/1024-3.2 mV; theoretically, the circuit can realize 1024 (2) 10 ) Control of the operating mode.
The MCU6 employs the inverse operation:
let the input voltage be VI and the output voltage be Vo, then Vo — VI R2/(R1+ R2), so VI — Vo (R1+ R2)/R2.
The precision of the modulus conversion theoretically determines the number of the working mode control which can be actually realized by the circuit.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the invention, and do not limit the scope of the invention, and various modifications and improvements of the technical solution of the invention by those skilled in the art without departing from the spirit of the invention are intended to fall within the scope of the invention defined by the claims.
Claims (6)
1. A method for realizing multi-band switching of satellite communication equipment is characterized in that input voltage is divided firstly, so that the output voltage range of the input voltage accords with the use of a later-stage analog-to-digital converter, then the output voltage of a divider is subjected to analog-to-digital conversion, so that the analog voltage output by the divider is converted into binary data which can be identified by an MCU (microprogrammed control unit) and is transmitted to the MCU, the MCU calculates the actual input voltage value through inverse operation according to the output data of the analog-to-digital converter, and then controls a radio frequency unit to carry out corresponding band switching according to the input voltage range value, so that the radio frequency unit works in a corresponding radio frequency band.
2. The method for implementing multiband switching of satellite communication equipment according to claim 1, wherein the method is to shunt the intermediate frequency signal, clock and power source inputted from the common terminal by the multiplexing unit.
3. The method for implementing multiband switching of satellite communication equipment according to claim 2, wherein the divider is composed of a resistor R1, a resistor R2, a capacitor C3 and an operational amplifier Q1, the resistor R1 is connected to the multiplexing unit and the power supply management at one end, and is connected to the same-direction end of the operational amplifier Q1 at the other end, and is connected to ground through the capacitor C3 and the resistor R2, respectively, the opposite-direction end of the operational amplifier Q1 is connected to the output terminal out, and the output terminal out is connected to the MCU through analog-to-digital conversion 3.
4. The method for implementing multiband switching of satellite communication equipment according to claim 2 or 3, wherein the multiplexing unit is composed of a capacitor C1, a capacitor C2, an inductor L1 and an inductor L2, and is used for shunting the intermediate frequency signal, the clock and the power supply of the common port, wherein the intermediate frequency signal is an output signal of the up-converter or an output signal of the down-converter; the clock signal is used for providing a reference clock for a local oscillation unit of the frequency converter; the power supply signal is used for supplying power to the whole product and is used for switching frequency bands.
5. The method for implementing multiband switching of satellite communication equipment according to claim 1, wherein the input voltage is in the range of 10V to 30V, and after passing through the divider, the output voltage is controlled within 5V or 3.3V.
6. The method for implementing multiband switching of satellite communication equipment according to claim 5, wherein the analog-to-digital converter is an MCU (microprogrammed control Unit) internal integrated analog-to-digital converter, and the output voltage range is 0-3.3V.
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| CN202210426458.8A CN114866129A (en) | 2022-04-21 | 2022-04-21 | Method for realizing multi-band switching of satellite communication equipment |
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| CN202210426458.8A CN114866129A (en) | 2022-04-21 | 2022-04-21 | Method for realizing multi-band switching of satellite communication equipment |
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| CN1947330A (en) * | 2004-02-10 | 2007-04-11 | 比特沃半导体公司 | Programmable radio transceiver |
| CN108092626A (en) * | 2017-12-29 | 2018-05-29 | 陕西海泰电子有限责任公司 | A kind of broadband Larger Dynamic down conversion module |
| CN108776260A (en) * | 2018-06-15 | 2018-11-09 | 常州同惠电子股份有限公司 | Synchronisation source automatic selection circuit for power meter |
| CN109714067A (en) * | 2018-12-04 | 2019-05-03 | 成都市精准时空科技有限公司 | System frequency band switching method, device, storage medium, receiving end and terminal |
| CN209878873U (en) * | 2019-01-24 | 2019-12-31 | 中广核工程有限公司 | Excitation voltage isolation sampling circuit and generator excitation system simulation tester |
| US10771080B1 (en) * | 2019-04-05 | 2020-09-08 | Infineon Technologies Ag | System and method for mode control using an input of an analog-to-digital converter |
| CN215986975U (en) * | 2021-11-02 | 2022-03-08 | 成都金诺信高科技有限公司 | Standard frequency lossless switching device based on power detection |
-
2022
- 2022-04-21 CN CN202210426458.8A patent/CN114866129A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1947330A (en) * | 2004-02-10 | 2007-04-11 | 比特沃半导体公司 | Programmable radio transceiver |
| CN108092626A (en) * | 2017-12-29 | 2018-05-29 | 陕西海泰电子有限责任公司 | A kind of broadband Larger Dynamic down conversion module |
| CN108776260A (en) * | 2018-06-15 | 2018-11-09 | 常州同惠电子股份有限公司 | Synchronisation source automatic selection circuit for power meter |
| CN109714067A (en) * | 2018-12-04 | 2019-05-03 | 成都市精准时空科技有限公司 | System frequency band switching method, device, storage medium, receiving end and terminal |
| CN209878873U (en) * | 2019-01-24 | 2019-12-31 | 中广核工程有限公司 | Excitation voltage isolation sampling circuit and generator excitation system simulation tester |
| US10771080B1 (en) * | 2019-04-05 | 2020-09-08 | Infineon Technologies Ag | System and method for mode control using an input of an analog-to-digital converter |
| CN215986975U (en) * | 2021-11-02 | 2022-03-08 | 成都金诺信高科技有限公司 | Standard frequency lossless switching device based on power detection |
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