CN109039429B - Signal processing method for satellite communication - Google Patents
Signal processing method for satellite communication Download PDFInfo
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- CN109039429B CN109039429B CN201810939233.6A CN201810939233A CN109039429B CN 109039429 B CN109039429 B CN 109039429B CN 201810939233 A CN201810939233 A CN 201810939233A CN 109039429 B CN109039429 B CN 109039429B
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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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Abstract
The invention provides a signal processing method for satellite communication, and belongs to the technical field of satellite communication. The method solves the technical problems that the existing satellite communication signal processing method is poor in anti-jamming capability and the like. The satellite communication signal processing method comprises the steps of low-noise amplification, frequency mixing processing, analog signal digitization, signal matching, frequency hopping tuning processing and the like.
Description
Technical Field
The utility model belongs to the technical field of satellite communication, refer in particular to a signal processing method of satellite communication.
Background
Satellite communication is simply communication between radio communication stations on earth (including the ground and in the lower atmosphere) using a satellite as a relay. The satellite communication system consists of two parts, a satellite and an earth station. The satellite communication is characterized in that: the communication range is large; communication can be performed from any two points as long as the range covered by the electric wave transmitted by the satellite is covered; the device is not easily affected by land disasters (high reliability); the earth station circuit can be switched on (the circuit is switched on quickly) only by setting the earth station circuit; meanwhile, the system can receive at multiple places, and can economically realize broadcasting and multiple access communication (multiple access characteristic); the circuit is very flexible in arrangement, and excessively centralized telephone traffic can be dispersed at any time; the same channel may be used for different directions or different intervals.
The power control technology in the satellite communication system mainly means that on the premise of ensuring the communication quality of a user, the transmitting power is reduced to the minimum extent, the system interference is reduced, and the system margin is increased. On the basis of evaluating the received signal strength, signal-to-noise ratio and other indexes of the receiving end, the transmitting power is changed timely to compensate the path loss and fading in the wireless channel, so that the communication quality is maintained, and no additional interference is generated to other users in the wireless resource.
Currently, in the technical field of satellite communication, a frequency circuit processor of a power carrier has a slow signal processing speed and poor anti-interference capability.
Disclosure of Invention
The utility model aims at providing a more stable, the stronger signal processing method of interference killing feature.
The purpose of the utility model is realized like this:
a signal processing method for satellite communication, comprising: the method comprises the following steps:
a. low-noise amplification: amplifying the low noise received from the satellite through an amplifying circuit;
b. and (3) mixing processing: the amplified low-noise signal is processed through a mixing circuit to obtain a power signal;
c. analog signal digitization: converting the power signal obtained after the frequency mixing treatment into a corresponding digital signal through a conversion circuit;
d. signal matching: comparing and matching the processed digital signal with several specific signals preset in a processor; if the matching with a certain specific signal is successful, the processing is finished;
e. and (3) frequency hopping tuning processing: if the matching is unsuccessful, the frequency hopping tuning processing is carried out on the digital signal, and the comparison and matching are carried out again after the processing until the matching is successful.
In the above method for processing signals in satellite communication, the step a further includes an isolation circuit connected in series with the amplifying circuit, where the isolation circuit is capable of isolating high-frequency signals in opposite directions.
In the above method for processing signals in satellite communication, the power signal after mixing in step b is in the frequency band of 950MHz-1450 MHz.
In the above-mentioned signal processing method for satellite communication, the conversion circuit in step c includes a sampler, a quantizer and a code modulator, and when in operation, the sampler first performs bandpass sampling on the power signal, then performs discretization processing on the sampled signal by using the quantizer, and then the code modulator encodes the discretized quantized signal, thereby obtaining the required digital signal.
Compared with the prior art, the utility model outstanding and profitable technological effect is:
in the field of satellite communication, if the carrier power is abnormal, the communication quality is affected, the communication between a terminal and a satellite is interrupted under severe conditions, interference can be effectively inhibited by using the signal processing method, the influence of the external environment on the satellite communication is reduced, and the anti-interference capability and the stability are better.
Drawings
Fig. 1 is a flow chart of the present invention.
Detailed Description
The invention will be further described in the following with specific embodiments in conjunction with the drawings, see fig. 1:
the satellite communication signal processing method comprises the following steps:
a. low-noise amplification: amplifying the low noise received from the satellite through an amplifying circuit; the amplifying circuit is also connected in series with an isolating circuit capable of isolating the reverse high-frequency signals;
b. and (3) mixing processing: the amplified low-noise signal is processed through a mixing circuit to obtain a power signal; the power signal after the frequency mixing treatment is in a 950MHz-1450MHz frequency band;
c. analog signal digitization: converting the power signal obtained after the frequency mixing treatment into a corresponding digital signal through a conversion circuit; the conversion circuit comprises a sampler, a quantizer and a code modulator, wherein when the conversion circuit works, the sampler firstly carries out band-pass sampling on a power signal, then the quantizer carries out discretization processing on the sampled signal, and then the code modulator codes the discretized quantized signal so as to obtain a required digital signal;
d. signal matching: comparing and matching the processed digital signal with several specific signals preset in a processor; if the matching with a certain specific signal is successful, the processing is finished;
e. and (3) frequency hopping tuning processing: if the matching is unsuccessful, the frequency hopping tuning processing is carried out on the digital signal, and the comparison and matching are carried out again after the processing until the matching is successful.
In the field of satellite communication, if the carrier power is abnormal, the communication quality is affected, the communication between a terminal and a satellite is interrupted under severe conditions, interference can be effectively inhibited by using the signal processing method, the influence of the external environment on the satellite communication is reduced, and the anti-interference capability and the stability are better.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (4)
1. A signal processing method for satellite communication, comprising: the method comprises the following steps:
a. low-noise amplification: amplifying the low noise received from the satellite through an amplifying circuit;
b. and (3) mixing processing: the amplified low-noise signal is processed through a mixing circuit to obtain a power signal;
c. analog signal digitization: converting the power signal obtained after the frequency mixing treatment into a corresponding digital signal through a conversion circuit;
d. signal matching: comparing and matching the processed digital signal with several specific signals preset in a processor; if the matching with a certain specific signal is successful, the processing is finished;
e. and (3) frequency hopping tuning processing: if the matching is unsuccessful, the frequency hopping tuning processing is carried out on the digital signal, and the comparison and matching are carried out again after the processing until the matching is successful.
2. The signal processing method of claim 1, wherein: the step a also comprises an isolation circuit connected with the amplifying circuit in series, and the isolation circuit can isolate the inverted high-frequency signals.
3. The signal processing method of claim 1, wherein: the power signal after the frequency mixing processing in the step b is in a frequency band of 950MHz-1450 MHz.
4. The signal processing method of claim 3, wherein: the conversion circuit in the step c comprises a sampler, a quantizer and a code modulator, wherein when the conversion circuit works, the sampler firstly carries out band-pass sampling on the power signal, then the quantizer carries out discretization processing on the sampled signal, and then the code modulator codes the discretized quantized signal, so that the required digital signal is obtained.
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| CN201810939233.6A CN109039429B (en) | 2018-08-17 | 2018-08-17 | Signal processing method for satellite communication |
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| CN201810939233.6A CN109039429B (en) | 2018-08-17 | 2018-08-17 | Signal processing method for satellite communication |
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| CN109039429B true CN109039429B (en) | 2021-01-26 |
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Denomination of invention: A signal processing method for satellite communication Effective date of registration: 20211110 Granted publication date: 20210126 Pledgee: Zhejiang Taizhou Luqiao Rural Commercial Bank Co., Ltd Pledgor: Zhejiang Jinbo Electronics Co., Ltd Registration number: Y2021330002193 |
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