Satellite communication system capable of realizing pilot frequency communication and communication method thereof

Abstract

The invention discloses a satellite communication system capable of realizing pilot frequency communication and a communication method thereof. The satellite communication system comprises a satellite antenna radio frequency unit, a power divider, a combiner, a pilot frequency conversion module, a power attenuation module and two sets of satellite modulation and demodulation units, the satellite antenna radio frequency unit is in communication connection with a satellite; the satellite antenna radio frequency unit comprises a transmitting module and a receiving module, the input end of the power divider is connected with the receiving module of the satellite antenna radio frequency unit, the output end of the power divider is connected with the input end of the pilot frequency conversion module, the output end of the pilot frequency conversion module is connected with the input end of the combiner, and the output end of the combiner is connected with the transmitting module of the satellite antenna radio frequency unit. Through uplink or downlink frequency conversion of two kinds of intermediate frequency baseband signals, a set of satellite antenna radio frequency system is shared, two sets of modulation and demodulation systems with different frequency bands are accessed at the same time, and through effective processing of the signals with the different frequency bands, the flexibility and efficiency of satellite communication are improved.

Description

Technical Field

[0001] The present invention belongs to the field of satellite communication technology, and specifically relates to a satellite communication system capable of realizing hetero-frequency communication. The present invention also relates to a satellite communication method capable of realizing hetero-frequency communication. Background Art

[0002] In existing satellite communication systems, it is usually necessary to configure independent satellite antenna radio frequency units for different baseband signals (such as L-band and S-band), which leads to waste of resources and reduced communication efficiency. At the same time, when high-throughput satellite network applications are used, the transmission gain requirements are high and the transmission level should not be too high. Therefore, a modulation and demodulation system that can simultaneously process signals of two different frequency bands is urgently needed to improve the flexibility and efficiency of satellite communications. Summary of the invention

[0003] The object of the present invention is to provide a satellite communication system and a communication method thereof capable of realizing hetero-frequency communication, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a satellite communication system capable of realizing heterofrequency communication, comprising a satellite antenna radio frequency unit, a power divider, a combiner, a heterofrequency conversion module, a power attenuation module and two sets of satellite modem units; the satellite antenna radio frequency unit is connected to the satellite communication; the satellite antenna radio frequency unit comprises a transmitting module and a receiving module, the input end of the power divider is connected to the receiving module of the satellite antenna radio frequency unit, the output end of the power divider is connected to the input end of the heterofrequency conversion module, the output end of the heterofrequency conversion module is connected to the input end of the combiner, and the output end of the combiner is connected to the transmitting module of the satellite antenna radio frequency unit.

[0005] Preferably, the transmitting module is configured as a BUC, which up-converts the S-band signal output by the combiner and transmits it to the satellite through space. The BUC is an up-conversion power amplifier.

[0006] Preferably, the receiving module is an LNB, which down-converts the received satellite signal into an intermediate frequency signal in the L band and inputs it into the power divider. The LNB is a low noise down-converter.

[0007] Preferably, the power splitter outputs two signals, one of which directly enters the L-band modem, and the L-band modem is connected to the heterofrequency conversion module, and the other enters the heterofrequency conversion module; the power splitter is used for signal power division.

[0008] Preferably, the heterodyne frequency conversion module converts the frequency of uplink and downlink L-band to S-band during satellite communication.

[0009] Preferably, it also includes a power attenuation module, the output end of the power attenuation module is connected to the input end of the combiner; the input end of the power attenuation module is connected to the uplink output end of the frequency conversion module; it is used to reduce the satellite antenna BUC transmission power so that the L-band modem transmission gain meets the satellite access signal requirements.

[0010] A communication method for satellite communication capable of realizing hetero-frequency communication comprises the following steps:

[0011] 1) Select the satellite system based on the business requirements;

[0012] 2) Choose to use large-beam broadband satellites or high-throughput satellite communications;

[0013] 2.1) Use large-beam broadband satellite communications;

[0014] 2.11) The antenna completes satellite locking and tracking;

[0015] 2.12) Modulate and demodulate the S-band modem signal, and then select path a or path b;

[0016] If path a is selected: the antenna receives the signal and enters the frequency conversion terminal through the power divider; then the S-band signal is output and enters the modem for reception and demodulation;

[0017] If path b is selected: the modem modulates the signal and outputs the S-band signal to the combiner, and the signal is transmitted to the satellite via the antenna;

[0018] 2.13) The modem transmit and receive signals are locked;

[0019] 2.2) Use high-throughput satellite communications;

[0020] 2.21) The antenna completes satellite locking and tracking;

[0021] 2.22) performing L-band modem signal modulation and demodulation, and then selecting path c or path d;

[0022] If path c is selected: the antenna receiving signal directly enters the modem for reception and demodulation through the power divider;

[0023] If path d is selected: the modem modulates the signal and outputs the L-band signal to the hetero-frequency fusion terminal, and adjusts the transmission power to an appropriate size; the L-band signal is frequency-converted and then outputs the S-band signal to the combiner; the signal is transmitted to the satellite via the antenna;

[0024] 2.3) Determine whether the satellite modem is connected to the network; if not, repeat the operation of path d, and if yes, the service application can be carried out;

[0025] 3) Carry out business applications.

[0026] The technical effects and advantages of the present invention are as follows: by uplink or downlink frequency conversion of two intermediate frequency baseband signals, a common satellite antenna radio frequency system is achieved, and two modulation and demodulation systems of different frequency bands are simultaneously connected. By effectively processing signals of different frequency bands, the flexibility and efficiency of satellite communications are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the module structure of a satellite communication system capable of realizing hetero-frequency communication;

[0028] Figure 2 The present invention is a flow chart of a satellite communication method capable of realizing hetero-frequency communication.

[0029] In the figure: 1. Satellite antenna RF unit; 2. Hetero-frequency fusion terminal; 11. Transmitter module; 12. Receiving module; 21. S-band combiner; 22. L-band power divider; 23. Power attenuation module; 24. Hetero-frequency conversion module; 3. S-band modem; 4. L-band modem. DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figure 1 As shown, a satellite communication system capable of realizing hetero-frequency communication provided by the present invention comprises a set of satellite antenna radio frequency unit 1, a set of hetero-frequency fusion terminal 2 and two sets of satellite modulation and demodulation units; the satellite antenna radio frequency unit 1 is used to track space orbit satellite signals, and the satellite antenna radio frequency unit 1 comprises a transmitting module 11 and a receiving module 12, the antenna component transmitting module 11, namely BUC (up-conversion power amplifier) ​​is responsible for uplink transmission of satellite communication system signals, and the antenna component receiving module 12, namely LNB (low noise down converter) is responsible for downlink reception of satellite communication system signals; the satellite A in this embodiment is a high-throughput satellite, and the satellite B is a traditional broadband satellite, namely a large-beam broadband satellite;

[0032] The hetero-frequency fusion terminal 2 includes an L-band power splitter 22, an S-band combiner 21, a hetero-frequency conversion module 24, and a power attenuation module 23;

[0033] The L-band power splitter 22 is used for signal power splitting, dividing the signal after LNB down-conversion into two L-band signals;

[0034] The system of the present application includes a frequency conversion module 24, which is divided into a downlink conversion input and output and an uplink conversion input and output, and converts the downlink L-band signal output by the L-band power splitter 22 and the uplink L-band signal output by the L-band modem 4 into an S-band signal;

[0035] The system of the present application includes two sets of satellite modems, the working frequency ranges of which support L-band L-band modem 4 and S-band S-band modem 3 respectively, which are used to modulate and demodulate satellite signals of different service ranges, the L-band modem 4 is a high-throughput modem, which realizes communication with satellite A, and the S-band modem 3 realizes communication with satellite B;

[0036] The system of the present application includes a power attenuation module 23, which can be used to reduce the satellite antenna BUC transmission power so that the transmission gain of the L-band modem 4 meets the satellite network access signal requirements;

[0037] The satellite antenna LNB receives the satellite signal and down-converts it to the L-band. After being divided by the L-band power divider 22, the signal from port 1 enters the L-band modem 4 for demodulation. The demodulated signal of the L-band modem 4 is converted to the S-band through the uplink input port of the heterogeneous frequency conversion module 24. After that, the power amplifier power level of the power attenuation module is adjusted and output to port 2 of the S-band combiner 21. The signal enters the satellite antenna BUC for up-conversion and transmission to the space satellite to complete the communication.

[0038] Similarly, the satellite antenna LNB receives the satellite signal and down-converts it to the L-band. After power division by the L-band power divider 22, the signal enters the downlink input port of the frequency conversion module 24 from port 2 and is converted to the S-band. The signal is output to the S-band modem 3 for demodulation. The modulated signal of the S-band modem 3 enters port 1 of the S-band combiner 21, enters the satellite antenna BUC, and is up-converted and transmitted to the space satellite to complete the communication.

[0039] like Figure 2 As shown, the present invention also provides a communication method for satellite communication capable of realizing hetero-frequency communication, comprising the following steps:

[0040] 1) Select the satellite system based on the business requirements;

[0041] 2) Choose to use large-beam broadband satellites or high-throughput satellite communications;

[0042] 2.1) Use large-beam broadband satellite communications;

[0043] 2.11) The antenna completes satellite locking and tracking;

[0044] 2.12) Modulate and demodulate the S-band modem signal, and then select path a or path b;

[0045] If path a is selected: the antenna receives the signal and enters the frequency conversion terminal through the power divider; then the S-band signal is output and enters the modem for reception and demodulation;

[0046] If path b is selected: the modem modulates the signal and outputs the S-band signal to the combiner, and the signal is transmitted to the satellite via the antenna;

[0047] 2.13) The modem transmit and receive signals are locked;

[0048] 2.2) Use high-throughput satellite communications;

[0049] 2.21) The antenna completes satellite locking and tracking;

[0050] 2.22) performing L-band modem signal modulation and demodulation, and then selecting path c or path d;

[0051] If path c is selected: the antenna receiving signal directly enters the modem for reception and demodulation through the power divider;

[0052] If path d is selected: the modem modulates the signal and outputs the L-band signal to the hetero-frequency fusion terminal, and adjusts the transmission power to an appropriate size; the L-band signal is frequency-converted and then outputs the S-band signal to the combiner; the signal is transmitted to the satellite via the antenna;

[0053] 2.3) Determine whether the satellite modem is connected to the network; if not, repeat the operation of path d, and if yes, the service application can be carried out;

[0054] 3) Carry out business applications.

[0055] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A satellite communication system capable of realizing hetero-frequency communication, characterized in that: It includes a satellite antenna radio frequency unit, a power divider, a combiner, an inter-frequency conversion module, a power attenuation module and two sets of satellite modem units; the satellite antenna radio frequency unit is connected to satellite communication; the satellite antenna radio frequency unit includes a transmitting module and a receiving module, the input end of the power divider is connected to the receiving module of the satellite antenna radio frequency unit, the output end of the power divider is connected to the input end of the inter-frequency conversion module, the output end of the inter-frequency conversion module is connected to the input end of the combiner, and the output end of the combiner is connected to the transmitting module of the satellite antenna radio frequency unit.

2. The satellite communication system capable of realizing hetero-frequency communication according to claim 1, characterized in that: The transmitting module is configured as a BUC, which up-converts the S-band signal output by the combiner and transmits it to the satellite through space.

3. The satellite communication system capable of realizing hetero-frequency communication according to claim 1, characterized in that: The receiving module is an LNB, which down-converts the received satellite signal into an intermediate frequency signal of the L frequency band and inputs it into the power divider.

4. The satellite communication system capable of realizing hetero-frequency communication according to claim 1, characterized in that: The power divider outputs two signals, one of which directly enters the L-band modem, and the L-band modem is connected to the hetero-frequency conversion module, and the other enters the hetero-frequency conversion module.

5. The satellite communication system capable of realizing hetero-frequency communication according to claim 4, characterized in that: The frequency conversion module converts the uplink and downlink L-band frequencies to the S-band frequencies during satellite communication.

6. The satellite communication system capable of realizing hetero-frequency communication according to claim 1, characterized in that: It also includes a power attenuation module, the output end of the power attenuation module is connected to the input end of the combiner; the input end of the power attenuation module is connected to the uplink output end of the hetero-frequency conversion module.

7. A satellite communication method capable of realizing hetero-frequency communication according to any one of claims 1 to 6, characterized in that: The steps include: 1) Select the satellite system based on the business requirements; 2) Choose to use large-beam broadband satellites or high-throughput satellite communications; 2.1) Use large-beam broadband satellite communications; 2.11) The antenna completes satellite locking and tracking; 2.12) Modulate and demodulate the S-band modem signal, and then select path a or path b; If path a is selected: the antenna receives the signal and enters the frequency conversion terminal through the power divider; then the S-band signal is output and enters the modem for reception and demodulation; If path b is selected: the modem modulates the signal and outputs the S-band signal to the combiner, and the signal is transmitted to the satellite via the antenna; 2.13) The modem transmit and receive signals are locked; 2.2) Use high-throughput satellite communications; 2.21) The antenna completes satellite locking and tracking; 2.22) performing L-band modem signal modulation and demodulation, and then selecting path c or path d; If path c is selected: the antenna receiving signal directly enters the modem for reception and demodulation through the power divider; If path d is selected: the modem modulates the signal and outputs the L-band signal to the hetero-frequency fusion terminal, and adjusts the transmission power to an appropriate size; the L-band signal is frequency-converted and then outputs the S-band signal to the combiner; the signal is transmitted to the satellite via the antenna; 2.3) Determine whether the satellite modem is connected to the network; if not, re-perform the operation of path d, and if yes, then the service application can be carried out; 3) Carry out business applications.

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