CN115085802B - Weak satellite signal tracking method and system for non-cooperative reception - Google Patents
Weak satellite signal tracking method and system for non-cooperative reception Download PDFInfo
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- CN115085802B CN115085802B CN202211014648.5A CN202211014648A CN115085802B CN 115085802 B CN115085802 B CN 115085802B CN 202211014648 A CN202211014648 A CN 202211014648A CN 115085802 B CN115085802 B CN 115085802B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B17/318—Received signal strength
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- H04B17/345—Interference values
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Abstract
The invention relates to a weak satellite signal tracking method and a system for non-cooperative reception, belonging to the technical field of communication, wherein the weak satellite signal tracking method for non-cooperative reception is characterized in that under the scene of normal communication between a satellite terminal and a satellite, a matched antenna receives a satellite network wireless signal in the air; processing the satellite network wireless signal into an intermediate frequency signal through down-conversion; demodulating the intermediate frequency signal, performing data reduction processing, and feeding back signal characteristics of the satellite network wireless signal; and presenting weak signal tracking according to the signal characteristics. The weak signal tracking equipment of the non-cooperative receiving satellite is erected to capture the weak signal of the aerial satellite communication network, so that the continuous tracking management and the like of the satellite weak signal received by the non-cooperative receiving aerial satellite are realized.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a weak satellite signal tracking method for non-cooperative reception.
Background
Conventional satellite communication data acquisition is achieved in a cooperative manner through wireless links and satellite signaling interaction.
For the method that a wireless link is not established between the satellite and the satellite, signaling interaction is not carried out between the satellite and the satellite, and the method of acquiring the wireless signals of the satellite network in the air is regarded as a non-cooperative receiving method. The satellite signal tracked in this way may be weak due to a high orbit satellite and a high frequency band.
The weak signal tracking capability of the high-orbit and high-frequency satellite in the prior art is insufficient.
Disclosure of Invention
The invention aims to provide a weak satellite signal tracking method for non-cooperative reception, which is used for solving the technical problems in the prior art, and the defect of weak signal tracking capability for a satellite with a high orbit and a high frequency band in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method for tracking weak satellite signals received without cooperation, comprising the steps of:
s1, receiving a satellite network wireless signal in the air by a matched antenna under a scene that a satellite terminal and a satellite normally communicate;
s2, processing the satellite network wireless signal into an intermediate frequency signal through down-conversion;
s3, demodulating the intermediate frequency signal, performing data reduction processing, and feeding back signal characteristics of the satellite network wireless signal;
s4, weak signal tracking is presented according to the signal characteristics, wherein,
sending the captured weak signals into a tracking channel, and calculating the information of the background noise and the signal intensity of the captured weak signals in a period;
judging the continuity and the integrity of the signal according to the signal model;
if the signal capture is completed in the period, establishing the basic signal characteristics of the capture according to the period;
carrying out smooth calculation on the signal characteristics in a plurality of continuous periods, importing a signal model for carrying out mimicry calculation, and analyzing the possible forms of subsequent signals;
and if the subsequent form of analysis meets the characteristic analysis of the signal model, realizing long-time signal tracking.
Further, in step S1, a matching antenna transceiving fault detection link is further included, specifically as follows:
an antenna input detection unit and an antenna output detection unit are arranged;
the antenna input detection unit is used for detecting whether an input signal of the matched antenna meets the input preset requirement when receiving the satellite network wireless signal in the air;
the antenna output detection unit is used for detecting whether output data corresponding to the satellite network wireless signal output by the matched antenna meets the output preset requirement or not;
when detecting that an input signal of a matched antenna does not meet the input preset requirement when receiving an aerial satellite network wireless signal, a matched antenna receiving and transmitting fault detection link judges that a matched antenna receiving end has a fault;
when detecting that an input signal of the matched antenna meets an input preset requirement when receiving an aerial satellite network wireless signal and detecting that output data corresponding to the matched antenna outputting the satellite network wireless signal does not meet the output preset requirement, the matched antenna receiving and transmitting fault detection link judges that a matched antenna data processing end has a fault.
Further, when the antenna input detection unit detects whether the input signal of the supporting antenna when receiving the wireless signal of the aerial satellite network meets the input preset requirement, if the input signal of the supporting antenna when receiving the wireless signal of the aerial satellite network is detected for the first time and does not meet the input preset requirement, the antenna input detection unit performs secondary judgment on the current input signal, if the input signal does not meet the input preset requirement yet, the detection result of the antenna input detection unit is that the input signal does not meet the input preset requirement, and otherwise, the detection result of the antenna input detection unit is that the input signal meets the input preset requirement.
Further, when the antenna output detection unit detects whether the output data corresponding to the satellite network wireless signal output by the matched antenna meets the output preset requirement, if the output data corresponding to the satellite network wireless signal output by the matched antenna does not meet the output preset requirement for the first time, the antenna output detection unit performs secondary judgment on the current output data, if the output data does not meet the output preset requirement yet, the detection result of the antenna output detection unit is that the output data does not meet the output preset requirement, and if not, the detection result of the antenna output detection unit is that the output data meets the output preset requirement.
A weak satellite signal tracking system for non-cooperative reception comprises a radio frequency processing module, a signal processing module and a signal tracking management module;
the radio frequency processing module receives satellite network signals through the radio frequency signal receiving module, processes the signals into intermediate frequency signals through down conversion and sends the intermediate frequency signals to the signal processing module;
the signal processing module demodulates the received signals and sends demodulated data to the signal tracking management module;
the signal tracking management module processes the input demodulation data and tracks and manages the tracked signals.
Compared with the prior art, the invention has the beneficial effects that:
the method has the advantages that the weak signals of the aerial satellite communication network are captured by erecting the non-cooperative receiving satellite weak signal tracking equipment, so that continuous tracking management of the satellite weak signals received by the aerial non-cooperative receiving satellite is realized. Because the target receiving signal of the matched antenna is a weak signal, a certain target signal interval can be preset according to the characteristics of the weak signal, namely the received network signal theoretically conforms to the target signal interval; if the antenna input detection unit detects that the wireless signals of the satellite network in the air are not in accordance with the target signal interval, it indicates that the receiving end of the matched antenna has a fault and needs to be maintained and debugged, and the follow-up processing actions are avoided to be invalid actions. Similarly, when the output data corresponding to the output satellite network wireless signal of the matched antenna does not meet the output preset requirement, the matched antenna judges that the matched antenna data processing end has a fault and needs to be maintained, debugged and the like, and the follow-up processing actions are avoided to be invalid actions and the like.
Drawings
Fig. 1 is a schematic diagram of weak signal tracking of a non-cooperative receiving satellite according to an embodiment of the present invention.
FIG. 2 is a block diagram of the system components of an embodiment of the present invention.
FIG. 3 is a schematic flow chart of the overall process of one embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to fig. 1 to 3 of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1 and 3, there is provided a weak satellite signal tracking method for non-cooperative reception, comprising the steps of:
s1, receiving a satellite network wireless signal in the air by a matched antenna under a scene that a satellite terminal and a satellite normally communicate;
s2, processing the satellite network wireless signal into an intermediate frequency signal through down-conversion;
s3, demodulating the intermediate frequency signal, performing data reduction processing, and feeding back signal characteristics of the satellite network wireless signal;
s4, weak signal tracking is presented according to the signal characteristics, wherein,
sending the captured weak signals into a tracking channel, and calculating the information of the background noise and the signal intensity of the captured weak signals in a period;
judging the continuity and the integrity of the signal according to the signal model;
if the signal capture is completed in the period, establishing the basic signal characteristics of the capture according to the period;
carrying out smooth calculation on the signal characteristics in a plurality of continuous periods, importing a signal model for carrying out mimicry calculation, and analyzing the possible forms of subsequent signals;
and if the subsequent form of analysis meets the characteristic analysis of the signal model, realizing long-time signal tracking.
In the scheme, weak signals of the aerial satellite communication network are captured by erecting non-cooperative receiving satellite weak signal tracking equipment, and continuous tracking management of the satellite weak signals received by the aerial non-cooperative receiving satellite is realized.
Further, in step S1, a matching antenna transceiving fault detection link is further included, specifically as follows:
an antenna input detection unit and an antenna output detection unit are arranged;
the antenna input detection unit is used for detecting whether an input signal of the matched antenna meets the input preset requirement when receiving the satellite network wireless signal in the air;
the antenna output detection unit is used for detecting whether output data corresponding to the satellite network wireless signal output by the matched antenna meets the output preset requirement or not;
when detecting that an input signal of a matched antenna does not meet the input preset requirement when receiving an aerial satellite network wireless signal, a matched antenna receiving and transmitting fault detection link judges that a matched antenna receiving end has a fault;
when detecting that an input signal of the matched antenna meets an input preset requirement when receiving an aerial satellite network wireless signal and detecting that output data corresponding to the matched antenna outputting the satellite network wireless signal does not meet the output preset requirement, a matched antenna receiving and transmitting fault detection link judges that a matched antenna data processing end has a fault.
In the above scheme, since the target receiving signal of the matched antenna is a weak signal, a certain target signal interval can be preset according to the characteristics of the weak signal, that is, the received network signal theoretically conforms to the target signal interval; if the antenna input detection unit detects that the received aerial satellite network wireless signal does not conform to the target signal interval, the fact that the matched antenna receiving end has a fault and needs to be maintained and debugged and the like is indicated, and the fact that follow-up processing actions are invalid is avoided. Similarly, when the output data corresponding to the output satellite network wireless signal of the matched antenna does not meet the output preset requirement, the matched antenna data processing end is judged to have a fault, maintenance, debugging and the like are needed, and the follow-up processing actions are avoided to be invalid actions.
Further, when the antenna input detection unit detects whether the input signal of the matched antenna when receiving the aerial satellite network wireless signal meets the input preset requirement, if the input signal of the matched antenna when receiving the aerial satellite network wireless signal is detected to be not in accordance with the input preset requirement for the first time, the antenna input detection unit performs secondary judgment on the current input signal, if the input signal does not meet the input preset requirement yet, the detection result of the antenna input detection unit is that the input signal does not meet the input preset requirement, and if not, the detection result of the antenna input detection unit is that the input signal meets the input preset requirement.
Further, when the antenna output detection unit detects whether the output data corresponding to the satellite network wireless signal output by the matched antenna meets the output preset requirement, if the output data corresponding to the satellite network wireless signal output by the matched antenna does not meet the output preset requirement for the first time, the antenna output detection unit performs secondary judgment on the current output data, if the output data does not meet the output preset requirement yet, the detection result of the antenna output detection unit is that the output data does not meet the output preset requirement, and if not, the detection result of the antenna output detection unit is that the output data meets the output preset requirement.
In the above scheme, in order to avoid accidental false operation of the antenna input detection unit and the antenna output detection unit in the operation process, a mechanism for judging twice needs to be designed, so that the false judgment of hardware equipment faults is avoided, and further, the manpower consumption for maintenance and debugging is avoided.
As shown in fig. 2, a weak satellite signal tracking system with non-cooperative reception includes a radio frequency processing module, a signal processing module and a signal tracking management module;
the radio frequency processing module receives satellite network signals through the radio frequency signal receiving module, processes the signals into intermediate frequency signals through down conversion and sends the intermediate frequency signals to the signal processing module;
the signal processing module demodulates the received signals and sends demodulated data to the signal tracking management module;
and the signal tracking management module processes the input demodulation data and performs tracking management on the tracked signals.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (5)
1. A method for tracking weak satellite signals received without cooperation, comprising the steps of:
s1, receiving a satellite network wireless signal in the air by a matched antenna under a scene that a satellite terminal and a satellite normally communicate;
s2, processing the satellite network wireless signal into an intermediate frequency signal through down-conversion;
s3, demodulating the intermediate frequency signal, performing data reduction processing, and feeding back signal characteristics of the satellite network wireless signal;
s4, tracking a weak signal according to the signal characteristics, wherein,
sending the captured weak signals into a tracking channel, and calculating the information of the background noise and the signal intensity of the captured weak signals in a period;
judging the continuity and the integrity of the signal according to the signal model;
if the signal capture is completed in the period, establishing the basic signal characteristics of the capture according to the period;
carrying out smooth calculation on the signal characteristics in a plurality of continuous periods, importing a signal model for carrying out mimicry calculation, and analyzing the possible forms of subsequent signals;
and if the subsequent form of analysis meets the characteristic analysis of the signal model, realizing long-time signal tracking.
2. The method for tracking weak satellite signals received without cooperation according to claim 1, wherein the step S1 further comprises a matching antenna transceiving fault detection section, specifically as follows:
an antenna input detection unit and an antenna output detection unit are arranged;
the antenna input detection unit is used for detecting whether an input signal of the matched antenna meets the input preset requirement when receiving the satellite network wireless signal in the air;
the antenna output detection unit is used for detecting whether output data corresponding to the satellite network wireless signal output by the matched antenna meets the output preset requirement or not;
when detecting that an input signal of a matched antenna does not meet the input preset requirement when receiving an aerial satellite network wireless signal, judging that a receiving end of the matched antenna fails by a matched antenna receiving and sending failure detection link;
when detecting that an input signal of the matched antenna meets an input preset requirement when receiving an aerial satellite network wireless signal and detecting that output data corresponding to the matched antenna outputting the satellite network wireless signal does not meet the output preset requirement, the matched antenna receiving and transmitting fault detection link judges that a matched antenna data processing end has a fault.
3. The method as claimed in claim 2, wherein when the antenna input detection unit detects whether the input signal of the satellite network wireless signal in the air received by the supporting antenna meets the input preset requirement, if the input signal of the satellite network wireless signal in the air received by the supporting antenna is detected to not meet the input preset requirement for the first time, the antenna input detection unit performs secondary judgment on the current input signal, and if the input signal does not meet the input preset requirement, the detection result of the antenna input detection unit is that the input signal does not meet the input preset requirement, otherwise, the detection result of the antenna input detection unit is that the input signal meets the input preset requirement.
4. The method as claimed in claim 3, wherein the antenna output detection unit determines the current output data for the second time if it is first detected that the output data corresponding to the wireless signal of the satellite network outputted from the antenna does not meet the output preset requirement, and determines the output data as the output data not meeting the output preset requirement if the output data does not meet the output preset requirement, otherwise, determines the output data as the output data meeting the output preset requirement.
5. A weak satellite signal tracking system for non-cooperative reception, which is used for performing a weak satellite signal tracking method for non-cooperative reception according to any one of claims 1 to 4, and is characterized by comprising a radio frequency processing module, a signal processing module and a signal tracking management module;
the radio frequency processing module receives satellite network signals through the radio frequency signal receiving module, processes the signals into intermediate frequency signals through down conversion and sends the intermediate frequency signals to the signal processing module;
the signal processing module demodulates the received signals and sends demodulated data to the signal tracking management module;
the signal tracking management module processes the input demodulation data and tracks and manages the tracked signals.
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