CN112087251B - Ultra-wideband satellite communication carrier monitoring system - Google Patents
Ultra-wideband satellite communication carrier monitoring system Download PDFInfo
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- CN112087251B CN112087251B CN202010703424.XA CN202010703424A CN112087251B CN 112087251 B CN112087251 B CN 112087251B CN 202010703424 A CN202010703424 A CN 202010703424A CN 112087251 B CN112087251 B CN 112087251B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
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- H—ELECTRICITY
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Abstract
The invention discloses an ultra-wideband satellite communication carrier monitoring system, which comprises a radio frequency channel unit, a frequency-combining local oscillator unit, a reference clock unit, a general digital processing unit and a comprehensive data processing unit, wherein the frequency-combining local oscillator unit is used for generating a reference clock signal; the radio frequency channel unit, the frequency-on local oscillator unit, the reference clock unit, the general digital processing unit and the comprehensive data processing unit are interconnected through a bus; the radio frequency channel unit comprises a relevant node of which the input end is connected with L, C frequency bands in a satellite communication link, and the output end is connected with a 1 MHz-6 GHz receiving channel of the universal digital processing unit; the input end is connected with a related node of a Ku frequency band in a satellite communication link, and the output end is connected with a 6 GHz-18 GHz frequency conversion module of a 1 MHz-6 GHz receiving channel; the input end is connected with the related node of the Ka frequency band in the satellite communication link, and the output end is connected with the 18 GHz-40 GHz frequency conversion module of the 6 GHz-18 GHz frequency conversion module. The working frequency of the monitoring system can reach 1 MHz-40 GHz, and the full coverage of the satellite carrier signal frequency band is realized.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to an ultra-wideband satellite communication carrier monitoring system.
Background
The satellite communication system is gradually widely and deeply applied as an important national infrastructure, and plays a very important role in national military and national economy. In recent years, with the continuous expansion of the quantity and the types of satellite resources, frequency-using equipment is increased, the electromagnetic environment is more complicated, the interference phenomenon of a satellite communication system is increased, and the risk that the normal operation of the system is affected by the reduction of the signal-to-noise ratio of equipment in the actual task operation process is caused.
Existing monitoring of satellite transponder uplink and downlink carrier signals is achieved by using a spectrometer access. When the error rate becomes high or the communication is affected in the communication process, the spectrum analyzer is accessed to observe the carrier spectrum condition, and possible fault reasons are analyzed and positioned by manually switching the access position.
In the prior art, the use of a spectrometer as a monitoring device is only a subsequent fault analysis means, and cannot be applied to automatic discovery of carrier signal abnormity in real time. Meanwhile, the broadband spectrometer has the defects of high cost, poor expansibility and poor customizable capability of application software.
In the second prior art, a carrier signal monitoring device accessing a dedicated frequency band after down-conversion of a satellite downlink is used for monitoring, as shown in fig. 1. The carrier change conditions of a plurality of repeaters can be polled and monitored in real time, and the abnormal judgment and alarm prompt of carrier signals can be automatically carried out according to the set alarm strategy.
However, because the carrier signal monitoring device of the dedicated frequency band is adopted, the frequency band coverage is limited, the monitoring can be only performed aiming at the nodes of the specific frequency band, the carrier signals of the nodes of the satellite uplink and downlink cannot be monitored comprehensively, and the fault location capability is poor.
Disclosure of Invention
The invention provides an ultra-wideband satellite communication carrier monitoring system, aiming at solving the problem that the existing carrier monitoring system can not effectively carry out automatic online real-time monitoring on each node in an uplink and a downlink of a satellite communication ground station, wherein the working frequency range of the monitoring system can reach 1 MHz-40 GHz to the maximum extent, the working frequency range of the existing carrier monitoring system is greatly expanded, and the full coverage of a satellite carrier signal frequency band is realized.
In order to achieve the purpose of the invention, the technical scheme is as follows: an ultra-wideband satellite communication carrier monitoring system comprises a radio frequency channel unit, a frequency-combining local oscillator unit, a reference clock unit, a general digital processing unit and a comprehensive data processing unit; the radio frequency channel unit, the frequency-on local oscillator unit, the reference clock unit, the general digital processing unit and the comprehensive data processing unit are interconnected through a bus to complete digital information interaction; the radio frequency channel unit is provided with a radio frequency interface and is used for receiving related node information in a satellite communication link; the comprehensive data processing unit is provided with an interface to realize information interaction with peripheral equipment;
the radio frequency channel unit comprises a 1 MHz-6 GHz receiving channel, a 6 GHz-18 GHz frequency conversion module and an 18 GHz-40 GHz frequency conversion module;
the input end of the 1 MHz-6 GHz receiving channel is connected with the relevant node of L, C frequency band in the satellite communication link, and the output end is connected with the universal digital processing unit;
the input end of the 6 GHz-18 GHz frequency conversion module is connected with a relevant node of a Ku frequency band in a satellite communication link, and the output end of the 6 GHz-18 GHz frequency conversion module is connected with a 1 MHz-6 GHz receiving channel and is used for down-converting a signal of the 6 GHz-18 GHz frequency band into a signal of the 1 MHz-6 GHz frequency band and inputting the signal into the 1 MHz-6 GHz receiving channel;
the input end of the 18 GHz-40 GHz frequency conversion module is connected with a relevant node of a Ka frequency band in a satellite communication link, and the output end of the 18 GHz-40 GHz frequency conversion module is connected with the 6 GHz-18 GHz frequency conversion module and used for down-converting signals of the 18 GHz-40 GHz frequency band into signals of the 6 GHz-18 GHz frequency band and inputting the signals into the 6 GHz-18 GHz frequency conversion module.
The invention has the following beneficial effects:
1. the working frequency range of the ultra-wideband satellite communication carrier communication system can reach 1 MHz-40 GHz, the working frequency range of the existing carrier monitoring equipment is greatly expanded, and the full coverage of a satellite carrier signal frequency band is realized; the satellite communication carrier monitoring system formed by the equipment has the capability of synchronously monitoring a plurality of key nodes of a radio frequency link of a satellite ground station in real time.
2. The invention realizes the miniaturized ultra-wideband monitoring channel with the frequency range of 1 MHz-40 GHz by the radio frequency channel iteration mode, covers the satellite communication frequency range, reduces the technical realization difficulty and the equipment cost of ultra-wideband frequency spectrum monitoring, and improves the abnormity detection capability of the carrier monitoring system.
Drawings
Fig. 1 is a prior art satellite communication carrier monitoring principle.
Fig. 2 is a schematic block diagram of a satellite communication carrier monitoring apparatus according to embodiment 1.
Fig. 3 is a schematic diagram of the radio frequency channel unit described in embodiment 1.
Fig. 4 is a block diagram of an implementation of the 1MHz to 6GHz receiving channel described in embodiment 1.
Fig. 5 is a block diagram of an implementation of the 6GHz to 18GHz frequency conversion module described in embodiment 1.
Fig. 6 is a block diagram of an implementation of the 18GHz to 40GHz frequency conversion module described in embodiment 1.
Fig. 7 is a schematic diagram of carrier monitoring of a C-band satellite communication terrestrial link according to embodiment 1.
Fig. 8 is a schematic diagram of monitoring a Ku-band satellite communication terrestrial link carrier according to embodiment 1.
Fig. 9 is a schematic diagram of monitoring carriers of a Ka band satellite communication terrestrial link according to embodiment 1.
Fig. 10 is a block diagram of an implementation of a radio frequency channel unit of the Ku frequency band carrier monitoring device described in embodiment 3.
Fig. 11 is a block diagram of an implementation of a radio frequency channel unit of the Ka band carrier monitoring device according to embodiment 4.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
Example 1
As shown in fig. 2 and fig. 3, an ultra-wideband satellite communication carrier monitoring system includes a radio frequency channel unit, a frequency-combining local oscillator unit, a reference clock unit, a general digital processing unit, and a comprehensive data processing unit; the radio frequency channel unit, the frequency-on local oscillator unit, the reference clock unit, the general digital processing unit and the comprehensive data processing unit are interconnected through a bus to complete digital information interaction; the radio frequency channel unit is provided with a radio frequency interface and is used for receiving related node information in a satellite communication link; the comprehensive data processing unit is provided with an interface for realizing information interaction with an external device, and the interface is mainly provided with a network port and a USB port; analog signals among the board cards are interacted through a radio frequency interface;
the radio frequency channel unit comprises a 1 MHz-6 GHz receiving channel, a 6 GHz-18 GHz frequency conversion module and an 18 GHz-40 GHz frequency conversion module;
the input end of the 1 MHz-6 GHz receiving channel is connected with the relevant node of L, C frequency band in the satellite communication link, and the output end is connected with the universal digital processing unit;
the input end of the 6 GHz-18 GHz frequency conversion module is connected with a relevant node of a Ku frequency band in a satellite communication link, and the output end of the 6 GHz-18 GHz frequency conversion module is connected with a 1 MHz-6 GHz receiving channel and is used for down-converting a signal of the 6 GHz-18 GHz frequency band into a signal of the 1 MHz-6 GHz frequency band and inputting the signal into the 1 MHz-6 GHz receiving channel;
the input end of the 18 GHz-40 GHz frequency conversion module is connected with the relevant node of the Ka frequency band in the satellite communication link, and the output end of the 18 GHz-40 GHz frequency conversion module is connected with the 6 GHz-18 GHz frequency conversion module and used for down-converting the signals of the 18 GHz-40 GHz frequency band into the signals of the 6 GHz-18 GHz frequency band and inputting the signals into the 6 GHz-18 GHz frequency conversion module.
As an important means of military and civil wireless communication, satellite communication mainly covers frequency bands such as C, Ku, Ka and the like. The embodiment configures the carrier monitoring system according to the highest working frequency of the satellite communication ground station, and has certain economical efficiency while realizing full coverage of the working frequency band.
In a specific embodiment, as shown in fig. 4, the input end of the 1 MHz-6 GHz receiving channel is connected to the relevant node of L, C frequency band in the satellite communication link, and the output end is connected to the general digital processing unit.
The method for the superheterodyne secondary down-conversion of the 1 MHz-6 GHz receiving channel is characterized in that the 1 MHz-6 GHz receiving channel sets a front-end working mode and attenuation of an attenuator according to the size of an input signal, so that the radio frequency front end works in a linear state, then the frequency of a first local oscillator frequency source is scanned according to a set frequency range and scanning stepping, the radio frequency signal is down-converted to a set first intermediate frequency (7210MHz), the high and intermediate frequency signal is subjected to secondary frequency conversion, an interference signal is filtered, a required second intermediate frequency (210MHz) is output, and the required second intermediate frequency (210MHz) enters a general digital processing unit.
In a specific embodiment, as shown in fig. 5, the input end of the 6 GHz-18 GHz frequency conversion module is connected to a relevant node of a Ku frequency band in a satellite communication link, and the output end of the frequency conversion module is connected to a 1 MHz-6 GHz receiving channel, and is configured to down-convert a signal in the 6 GHz-18 GHz frequency band into a signal in the 1 MHz-6 GHz frequency band; as shown in FIG. 5, the 6 GHz-18 GHz frequency conversion module comprises
The radio frequency switch is used for dividing radio frequency signals of 6 GHz-18 GHz into 6 GHz-10 GHz bands, 10 GHz-14 GHz bands and 14 GHz-18 GHz bands;
the first filtering frequency conversion circuit is used for converting the 6 GHz-10 GHz wave band into the 1 GHz-5 GHz wave band through filtering down conversion;
the second filtering frequency conversion circuit is used for converting the 10 GHz-14 GHz wave band into 1 GHz-5 GHz wave band through filtering down conversion;
the third filtering frequency conversion circuit is used for converting the 14 GHz-18 GHz wave band into the 1 GHz-5 GHz wave band through filtering down conversion;
the intermediate frequency switch is used for combining the three signals after frequency conversion into one signal;
the intermediate frequency filtering unit is used for filtering and amplifying the combined signals;
and the local oscillator unit is used for providing local oscillator signals for the first filtering frequency conversion circuit, the second filtering frequency conversion circuit and the third filtering frequency conversion circuit.
In a specific embodiment, as shown in fig. 5, the first filtering and frequency converting circuit comprises
The 6 GHz-10 GHz band filter amplifier is used for carrying out filtering amplification processing on 6 GHz-10 GHz bands;
the first low-noise power amplifier is used for carrying out low-noise amplification processing on the output signal of the filter amplifier with the wave band of 6 GHz-10 GHz;
the first mixing filtering intermediate amplifying unit consists of a first mixer, a first 1 GHz-5 GHz band filter and a first intermediate frequency amplifier which are connected in sequence; the first mixing filtering intermediate amplifier unit down-converts the signals of 6 GHz-10 GHz band into 1 GHz-5 GHz, and performs amplification filtering;
the local oscillation unit provides a local oscillation signal of 11GHZ for the first frequency mixer.
In a specific embodiment, as shown in fig. 5, the second filtering and frequency converting circuit comprises
The 10 GHz-14 GHz band filter amplifier is used for carrying out filtering amplification processing on 10 GHz-14 GHz bands;
the second low-noise power amplifier is used for carrying out low-noise amplification processing on the output signal of the filter amplifier with the wave band of 10 GHz-14 GHz;
the second mixing filtering intermediate amplifying unit consists of a second mixer, a second 1 GHz-5 GHz band filter and a second intermediate frequency amplifier which are connected in sequence; the second mixing filtering intermediate amplifying unit down-converts the signals of 10 GHz-14 GHz wave band into 1 GHz-5 GHz waves and performs amplification filtering;
and the local oscillation unit provides a local oscillation signal of 9GHZ for the second frequency mixer.
In a specific embodiment, as shown in fig. 5, the third filtering and frequency converting circuit comprises
The 14 GHz-18 GHz band filter amplifier is used for carrying out filter amplification processing on 14 GHz-18 GHz bands;
the third low-noise power amplifier is used for carrying out low-noise amplification processing on the output signal of the filter amplifier with the wave band of 14 GHz-18 GHz;
a third mixing filtering intermediate amplifier unit consisting of a third mixer, a third 1 GHz-5 GHz band filter and a third intermediate frequency amplifier which are connected in sequence; the third mixing and filtering intermediate amplifier unit down-converts the signals in the 14 GHz-18 GHz wave band into 1 GHz-5 GHz waves and performs amplification and filtering;
and the local oscillation unit provides a local oscillation signal of 13GHZ for the third mixer.
In a specific embodiment, as shown in fig. 6, the input of the 18 GHz-40 GHz frequency conversion module is connected to a relevant node of the Ka frequency band in the satellite communication link, and the output of the frequency conversion module is connected to the 6 GHz-18 GHz frequency conversion module, and is configured to down-convert a signal of the 18 GHz-40 GHz frequency band into a signal of the 6 GHz-18 GHz frequency band; as shown in fig. 6. The 18 GHz-40 GHz frequency conversion module comprises
The input end of the radio frequency switch is connected with the Ka frequency band related node, and the output end of the radio frequency switch is connected with the wave band filter and is used for dividing the radio frequency signals of 18 GHz-40 GHz into 18 GHz-28 GHz wave bands and 28 GHz-40 GHz wave bands;
the filtering and amplifying part is used for filtering and amplifying signals of the frequency band of 18 GHz-28 GHz and the filtering and amplifying part is used for filtering and amplifying signals of 28 GHz-40 GHz;
a fourth mixing filtering intermediate amplifying unit consisting of a fourth mixer, an 8 GHz-18 GHz band filter and a fourth intermediate frequency amplifier, and used for down-converting 18 GHz-28 GHz signals into 8 GHz-18 GHz signals and performing amplification filtering;
a fifth mixing filtering intermediate amplifying unit consisting of a fifth mixer, a 6 GHz-18 GHz band filter and a fourth intermediate frequency amplifier, down-converting the 28 GHz-40 GHz signals into 6 GHz-18 GHz signals, and performing amplification filtering;
the intermediate frequency switch is used for combining the frequency-converted signals into 1 path of signals;
the intermediate frequency filtering unit consists of an intermediate frequency filter and an intermediate frequency amplifier and is used for filtering and amplifying the combined signal;
and the local oscillation module is used for providing a local oscillation signal of 36GHz for the fourth frequency mixer and providing a local oscillation signal of 22GHz for the fifth frequency mixer.
The ultra-wideband satellite communication carrier monitoring system mainly depends on hardware resources such as the existing communication receiving antenna and the communication link of the satellite communication ground station, and forms the satellite communication carrier monitoring system integrating automatic carrier monitoring, automatic signal analysis, automatic interference alarm and automatic auxiliary decision-making in the coverage area of the communication satellite by configuring carrier monitoring equipment and carrier monitoring and abnormal alarm strategy software, so that technical support is provided for reliable satellite communication in a complex electromagnetic environment. The ultra-wideband carrier monitoring system according to this embodiment is configured with carrier monitoring devices
A database server for storing carrier monitoring history data;
the application server is used for bearing carrier monitoring and abnormal alarm strategy software and implementing tasks such as carrier signal analysis, abnormal judgment, alarm prompt, abnormal handling and the like;
and the operation terminal is used for realizing the interaction between the user and the carrier monitoring system.
And the network switch is used for realizing the connection of the database server, the application server and the operation terminal with the comprehensive data processing unit.
In a specific embodiment, the 1 MHz-6 GHz receiving channel is used for receiving a C-band satellite communication link signal, and a ground station communication service process, as shown in fig. 7, a radio frequency link before a modem is processed as follows:
the antenna receives the satellite transponder signal and outputs the signal to the modem through the C low noise amplifier, the C/L down converter and the L frequency band intermediate frequency matrix;
and in the uplink, after the baseband signal is modulated by the modem, the signal is transmitted through the L-band intermediate frequency matrix, the L/C up-conversion and the C power amplifier and finally through the antenna.
The output signals of the C low-noise amplifier, the C/L down converter, the L/C up converter, the C power amplifier and the modem can be collected, the signal state of each device is monitored in real time, signal abnormity is found in time, and warning prompt is carried out.
In a specific embodiment, the 6GHz to 18GHz frequency conversion module is configured to receive a Ku frequency band satellite communication link signal, a communication service flow of the ground station is as shown in fig. 8, and a radio frequency link before the modem is processed as follows:
in the downlink, after receiving a satellite transponder signal, an antenna outputs the signal to a modem through a Ku low-noise amplifier, a Ku/L down converter and an L-frequency band intermediate frequency matrix;
and in the uplink, after the baseband signal is modulated by a modem, the baseband signal is transmitted out through an L frequency band intermediate frequency matrix, an L/Ku up-conversion and a Ku power amplifier and finally through an antenna.
The output signals of the Ku low-noise amplifier, the Ku/L down converter, the L/Ku up converter, the Ku power amplifier and the modem can be collected, the signal state of each device is monitored in real time, and signal abnormity is found in time and is alarmed.
In a specific embodiment, the 18GHz to 40GHz frequency conversion module is configured to receive a Ka band satellite communication link signal, and a ground station communication service process, as shown in fig. 9, a radio frequency link before a modem is processed as follows:
the antenna receives the satellite transponder signal and outputs the signal to the modem through the Ka low-noise amplifier, the Ka/C down converter, the C/L down converter and the L-band intermediate frequency matrix;
and in the uplink, after the baseband signal is modulated by the modem, the signal is transmitted through an L-frequency band intermediate frequency matrix, an L/C up-conversion, a C/Ka up-conversion and a Ka power amplifier and finally through an antenna.
The output signals of the Ka low-noise amplifier, the Ka/C down converter, the C/L down converter, the L/C up converter, the C/Ka up converter, the Ka power amplifier and the modem can be collected, the signal state of each device is monitored in real time, and signal abnormity is found in time and is alarmed.
Example 2
Based on the technical solution of the carrier monitoring system described in embodiment 1, this embodiment can design a corresponding C-band carrier monitoring device, whose working frequency band is 1MHz to 6GHz, and which mainly includes a C-band carrier monitoring device radio frequency channel unit, a frequency-combining local oscillator unit, a reference clock unit, a general digital processing unit, and a comprehensive data processing unit; the C-band carrier monitoring equipment radio frequency channel unit, the frequency-on local oscillator unit, the reference clock unit, the general digital processing unit and the comprehensive data processing unit are interconnected through a bus to complete digital information interaction; the radio frequency channel unit of the C-band carrier monitoring equipment is provided with a radio frequency interface for receiving related node information in a satellite communication link; the comprehensive data processing unit is provided with an interface to realize information interaction with peripheral equipment; analog signals among the board cards are interacted through a radio frequency interface;
the C-band carrier monitoring equipment radio frequency channel unit is a 1 MHz-6 GHz receiving channel, the input end of the 1 MHz-6 GHz receiving channel is connected with the relevant node of L, C frequency band in the satellite communication link, and the output end of the 1 MHz-6 GHz receiving channel is connected with the universal digital processing unit;
the 1 MHz-6 GHz receiving channel adopts a superheterodyne secondary down-conversion scheme to convert the input 1 MHz-6 GHz radio frequency signal to the required intermediate frequency. The 1 MHz-6 GHz receiving module sets the working mode of the front end and the attenuation of the attenuator according to the size of an input signal, so that the radio frequency front end works in a linear state, then scans the frequency of a first local oscillator frequency source according to the set frequency range and scanning stepping, so that the radio frequency signal is down-converted to a set first intermediate frequency (7210MHz) range, and the high and intermediate frequency signal is subjected to secondary frequency conversion, so that an interference signal is filtered, a required second intermediate frequency (210MHz) is output, and the two intermediate frequencies enter the general digital processing module.
Example 3
Based on the technical solution of the carrier monitoring system described in embodiment 1, as shown in fig. 10, this embodiment may design a corresponding Ku frequency band carrier monitoring device, whose working frequency band is 1MHz to 18GHz, which mainly includes
The system comprises a radio frequency channel unit, a frequency-combining local oscillator unit, a reference clock unit, a general digital processing unit and a comprehensive data processing unit of Ku frequency band carrier monitoring equipment; the Ku frequency band carrier monitoring equipment comprises a radio frequency channel unit, a frequency-close local oscillator unit, a reference clock unit, a general digital processing unit and a comprehensive data processing unit which are interconnected through a bus to complete digital information interaction; the radio frequency channel unit of the Ku frequency band carrier monitoring equipment is provided with a radio frequency interface for receiving related node information in a satellite communication link; the comprehensive data processing unit is provided with an interface to realize information interaction with peripheral equipment; analog signals among the board cards are interacted through a radio frequency interface;
the radio frequency channel unit of the Ku frequency band carrier monitoring equipment comprises
The input end of the frequency conversion module is connected with a relevant node of a Ku frequency band in a satellite communication link, and the output end of the frequency conversion module is connected with a 1 MHz-6 GHz receiving channel and is used for down-converting a signal of the 6 GHz-18 GHz frequency band into a signal of the 1 MHz-6 GHz frequency band;
and the input end of the 1 MHz-6 GHz receiving channel is connected with the relevant node of L, C frequency band in the satellite communication link, and the output end of the receiving channel is connected with the general digital processing unit and is used for converting the 1 MHz-6 GHz signal into an intermediate frequency signal of 210MHz, which is shown in FIG. 4. And the 6 GHz-18 GHz frequency conversion module is used for down-converting the signals with the 6 GHz-18 GHz frequency band into the signals with the 1 MHz-6 GHz frequency band and inputting the signals into the 1 MHz-6 GHz receiving channel for further processing.
Example 4
Based on the technical solution of the carrier monitoring system described in embodiment 1, this embodiment can design a corresponding Ka band carrier monitoring device, whose working band is 1MHz to 40GHz, which mainly includes
The system comprises a Ka frequency band carrier monitoring device radio frequency channel unit, a frequency-close local oscillator unit, a reference clock unit, a general digital processing unit and a comprehensive data processing unit; the Ka frequency band carrier monitoring equipment is characterized in that a radio frequency channel unit, a frequency-close local oscillator unit, a reference clock unit, a general digital processing unit and a comprehensive data processing unit are interconnected through a bus to complete digital information interaction; the Ka frequency band carrier monitoring equipment radio frequency channel unit is provided with a radio frequency interface for receiving related node information in a satellite communication link; the comprehensive data processing unit is provided with an interface to realize information interaction with peripheral equipment; analog signals among the board cards are interacted through a radio frequency interface;
the Ka frequency band carrier monitoring equipment radio frequency channel unit comprises
The input of the frequency conversion module is connected with a relevant node of a Ka frequency band in a satellite communication link, and the output of the frequency conversion module is connected with the 6 GHz-18 GHz frequency conversion module and used for down-converting the signals of the 18 GHz-40 GHz frequency band into the signals of the 6 GHz-18 GHz frequency band;
the input of the frequency conversion module is connected with a relevant node of a Ku frequency band in a satellite communication link, and the output of the frequency conversion module is connected with a 1 MHz-6 GHz receiving channel and used for down-converting a signal of the 6 GHz-18 GHz frequency band into a signal of the 1 MHz-6 GHz frequency band;
a 1 MHz-6 GHz receiving channel, the input of which is connected to the relevant node of L, C frequency band in the satellite communication link, and the output of which is connected to the intermediate frequency processing module comprehensive digital processing unit, for changing the 1 MHz-6 GHz signal into an intermediate frequency signal of 210MHz, as shown in fig. 6.
The 6 GHz-18 GHz frequency conversion module receives signals of which the frequency is converted into a 6 GHz-18 GHz frequency band by the 18 GHz-40 GHz frequency conversion module, performs frequency conversion on the signals to obtain signals of which the frequency is converted into a 1 MHz-6 GHz frequency band, and finally transmits the signals to a 1 MHz-6 GHz receiving channel for further processing.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An ultra-wideband satellite communication carrier monitoring system comprises a radio frequency channel unit, a frequency-combining local oscillator unit, a reference clock unit, a general digital processing unit and a comprehensive data processing unit; the radio frequency channel unit, the frequency-on local oscillator unit, the reference clock unit, the general digital processing unit and the comprehensive data processing unit are interconnected through a bus to complete digital information interaction; the radio frequency channel unit is provided with a radio frequency interface and is used for receiving related node information in a satellite communication link; the comprehensive data processing unit is provided with an interface to realize information interaction with peripheral equipment;
the method is characterized in that: the radio frequency channel unit comprises a receiving channel of 1 MHz-6 GHz,
a 6 GHz-18 GHz frequency conversion module and an 18 GHz-40 GHz frequency conversion module;
the input end of the 1 MHz-6 GHz receiving channel is connected with the relevant node of L, C frequency band in the satellite communication link, and the output end is connected with the universal digital processing unit;
the input end of the 6 GHz-18 GHz frequency conversion module is connected with a relevant node of a Ku frequency band in a satellite communication link, the output end of the 6 GHz-18 GHz frequency conversion module is connected with a 1 MHz-6 GHz receiving channel, and the 6 GHz-18 GHz frequency band signal is converted into a 1 MHz-6 GHz frequency band signal through down conversion, and the 1 MHz-6 GHz frequency band signal is input into the 1 MHz-6 GHz receiving channel;
the input end of the 18 GHz-40 GHz frequency conversion module is connected with a relevant node of a Ka frequency band in a satellite communication link, and the output end of the 18 GHz-40 GHz frequency conversion module is connected with the 6 GHz-18 GHz frequency conversion module and used for down-converting signals of the 18 GHz-40 GHz frequency band into signals of the 6 GHz-18 GHz frequency band and inputting the signals of the 6 GHz-18 GHz frequency band into the 6 GHz-18 GHz frequency conversion module;
and converting the input 1 MHz-6 GHz radio frequency signals into required intermediate frequency in a 1 MHz-6 GHz receiving channel, and outputting the intermediate frequency signals to a general digital processing module.
2. The ultra-wideband satellite communication carrier monitoring system of claim 1, wherein: the method for the superheterodyne secondary down-conversion of the 1 MHz-6 GHz receiving channel is characterized in that the 1 MHz-6 GHz receiving channel sets a working mode of a front end and an attenuation of an attenuator according to the size of an input signal, so that the radio frequency front end works in a linear state, then the frequency of a first local oscillator frequency source is scanned according to a set frequency range and scanning stepping, the radio frequency signal is down-converted to a set first intermediate frequency range, the high intermediate frequency signal is subjected to secondary frequency conversion, an interference signal is filtered, a required second intermediate frequency is output, and the second intermediate frequency enters a general digital processing unit.
3. The ultra-wideband satellite communication carrier monitoring system of claim 2, wherein: the 6 GHz-18 GHz frequency conversion module comprises
The radio frequency switch is used for dividing radio frequency signals of 6 GHz-18 GHz into 6 GHz-10 GHz bands, 10 GHz-14 GHz bands and 14 GHz-18 GHz bands;
the first filtering frequency conversion circuit is used for converting the 6 GHz-10 GHz wave band into the 1 GHz-5 GHz wave band through filtering down conversion;
the second filtering frequency conversion circuit is used for converting the 10 GHz-14 GHz wave band into the 1 GHz-5 GHz wave band through filtering down conversion;
the third filtering frequency conversion circuit is used for converting the 14 GHz-18 GHz wave band into the 1 GHz-5 GHz wave band through filtering down conversion;
the intermediate frequency switch is used for combining the three signals after frequency conversion into one signal;
the intermediate frequency filtering unit is used for filtering and amplifying the combined signals;
and the local oscillator unit is used for providing local oscillator signals for the first filtering frequency conversion circuit, the second filtering frequency conversion circuit and the third filtering frequency conversion circuit.
4. The ultra-wideband satellite communication carrier monitoring system of claim 3, wherein: the first filtering frequency conversion circuit comprises
The 6 GHz-10 GHz band filter amplifier is used for carrying out filtering amplification processing on 6 GHz-10 GHz bands;
the first low-noise power amplifier is used for carrying out low-noise amplification processing on the output signal of the filter amplifier with the wave band of 6 GHz-10 GHz;
the first mixing filtering intermediate amplifying unit consists of a first mixer, a first 1 GHz-5 GHz band filter and a first intermediate frequency amplifier which are connected in sequence; the first mixing filtering intermediate amplifier unit down-converts the signals of 6 GHz-10 GHz band into 1 GHz-5 GHz, and performs amplification filtering;
the local oscillation unit provides a local oscillation signal of 11GHZ for the first frequency mixer.
5. The ultra-wideband satellite communication carrier monitoring system of claim 4, wherein: the second filtering frequency conversion circuit comprises
The 10 GHz-14 GHz band filter amplifier is used for carrying out filtering amplification processing on 10 GHz-14 GHz bands;
the second low-noise power amplifier is used for carrying out low-noise amplification processing on the output signal of the filter amplifier with the wave band of 10 GHz-14 GHz;
the second mixing filtering intermediate amplifying unit consists of a second mixer, a second 1 GHz-5 GHz band filter and a second intermediate frequency amplifier which are connected in sequence; the second mixing filtering intermediate amplifier unit down-converts the signals of 10 GHz-14 GHz band into 1 GHz-5 GHz, and performs amplification filtering;
and the local oscillation unit provides a local oscillation signal of 9GHZ for the second frequency mixer.
6. The ultra-wideband satellite communication carrier monitoring system of claim 5, wherein: the third filtering frequency conversion circuit comprises
The 14 GHz-18 GHz band filter amplifier is used for carrying out filter amplification processing on 14 GHz-18 GHz bands;
the third low-noise power amplifier is used for carrying out low-noise amplification processing on the output signal of the filter amplifier with the wave band of 14 GHz-18 GHz;
a third mixing filtering intermediate amplifier unit consisting of a third mixer, a third 1 GHz-5 GHz band filter and a third intermediate frequency amplifier which are connected in sequence; the third mixing filtering intermediate amplifier unit down-converts the signals of the 14 GHz-18 GHz band into 1 GHz-5 GHz, and performs amplification filtering;
and the local oscillation unit provides a local oscillation signal of 13GHZ for the third mixer.
7. The carrier monitoring system of any of claims 3 to 6, wherein: the 18 GHz-40 GHz frequency conversion module comprises
The input end of the radio frequency switch is connected with the Ka frequency band related node, and the output end of the radio frequency switch is connected with the wave band filter and is used for dividing the radio frequency signals of 18 GHz-40 GHz into 18 GHz-28 GHz wave bands and 28 GHz-40 GHz wave bands;
the filtering and amplifying part is used for filtering and amplifying signals of the frequency band of 18 GHz-28 GHz and the filtering and amplifying part is used for filtering and amplifying signals of 28 GHz-40 GHz;
a fourth mixing filtering intermediate amplifying unit consisting of a fourth mixer, an 8 GHz-18 GHz band filter and a fourth intermediate frequency amplifier, and used for down-converting 18 GHz-28 GHz signals into 8 GHz-18 GHz signals and performing amplification filtering;
a fifth mixing filtering intermediate amplifying unit consisting of a fifth mixer, a 6 GHz-18 GHz band filter and a fourth intermediate frequency amplifier, and used for carrying out amplification filtering on the signals of 28 GHz-40 GHz after down-conversion to 6 GHz-18 GHz;
the intermediate frequency switch is used for combining the frequency-converted signals into 1 path of signals;
the intermediate frequency filtering unit consists of an intermediate frequency filter and an intermediate frequency amplifier and is used for filtering and amplifying the combined signal;
and the local oscillation module is used for providing a local oscillation signal of 36GHz for the fourth frequency mixer and providing a local oscillation signal of 22GHz for the fifth frequency mixer.
8. The ultra-wideband satellite communication carrier monitoring system of claim 7, wherein: the 1 MHz-6 GHz receiving channel is used for receiving signals of a satellite communication link in a C frequency band, and a radio frequency link in front of a modem is processed as follows:
the antenna receives the satellite transponder signal and outputs the signal to the modem through the C low noise amplifier, the C/L down converter and the L frequency band intermediate frequency matrix;
and in the uplink, after the baseband signal is modulated by the modem, the signal is transmitted through the L-band intermediate frequency matrix, the L/C up-conversion and the C power amplifier and finally through the antenna.
9. The ultra-wideband satellite communication carrier monitoring system of claim 8, wherein: the 6 GHz-18 GHz frequency conversion module is used for receiving Ku frequency band satellite communication link signals, and the radio frequency link processing before the modem is as follows:
in the downlink, after receiving a satellite transponder signal, an antenna outputs the signal to a modem through a Ku low-noise amplifier, a Ku/L down converter and an L-frequency band intermediate frequency matrix;
and in the uplink, after the baseband signal is modulated by a modem, the baseband signal is transmitted out through an L frequency band intermediate frequency matrix, an L/Ku up-conversion and a Ku power amplifier and finally through an antenna.
10. The ultra-wideband satellite communication carrier monitoring system of claim 9, wherein: the 18 GHz-40 GHz frequency conversion module is used for receiving Ka frequency band satellite communication link signals, and the radio frequency link processing before the modem is as follows:
the antenna receives the satellite transponder signal and outputs the signal to the modem through the Ka low-noise amplifier, the Ka/C down converter, the C/L down converter and the L-band intermediate frequency matrix;
and in the uplink, after the baseband signal is modulated by the modem, the signal is transmitted through an L-frequency band intermediate frequency matrix, an L/C up-conversion, a C/Ka up-conversion and a Ka power amplifier and finally through an antenna.
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| CN114244281B (en) * | 2021-12-27 | 2022-12-16 | 中国电子科技集团公司第三十八研究所 | Satellite-borne Ka frequency band broadband multi-channel down-conversion system |
| CN114363949B (en) * | 2022-01-21 | 2023-06-02 | 杭州北斗时空研究院 | Abnormal data detection method for UWB positioning system |
| CN114944865A (en) * | 2022-05-16 | 2022-08-26 | 河北东森电子科技有限公司 | Design and application method of ultra-wideband Ka-band satellite radio frequency unit |
| CN116232426A (en) * | 2022-12-30 | 2023-06-06 | 西安空间无线电技术研究所 | Integrated design method for satellite-borne C/Ku frequency band measurement and control transponder |
| CN116996114B (en) * | 2023-09-26 | 2023-12-26 | 辰极智航(北京)科技有限公司 | High-integration-level ground terminal SoC chip suitable for broadband satellite communication |
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