CN113691297B - Signal receiving method and device and signal transmission system - Google Patents

Signal receiving method and device and signal transmission system Download PDF

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Publication number
CN113691297B
CN113691297B CN202010418787.9A CN202010418787A CN113691297B CN 113691297 B CN113691297 B CN 113691297B CN 202010418787 A CN202010418787 A CN 202010418787A CN 113691297 B CN113691297 B CN 113691297B
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signal
satellite
channel
feeder link
compensation
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CN113691297A (en
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吕子平
朱棣
钟华
王瑞军
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
    • 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
    • H04B7/18515—Transmission equipment in satellites or space-based relays
    • 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
    • H04B7/18517—Transmission equipment in earth stations
    • 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
    • H04B7/18519—Operations control, administration or maintenance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Electromagnetism (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Radio Relay Systems (AREA)

Abstract

The disclosure relates to a signal receiving method, a signal receiving device and a signal transmission system, and relates to the field of wireless communication. The method comprises the following steps: acquiring channel characteristics of a feeder link channel adopted when each satellite forwards signals; calculating compensation parameters of channel characteristics of other feeder link channels according to the channel characteristics of the reference feeder link channel, wherein the reference feeder link channel is a feeder link channel adopted by a reference satellite in each satellite, the other channel characteristics are feeder link channels adopted by other satellites in each satellite, and the compensation parameters enable the channel characteristics of the other feeder link channels to be consistent with the channel characteristics of the reference feeder link channel; and under the condition that the terminal retransmits the user signal of the terminal through each satellite, fusing the retransmission signal of the reference satellite and each compensation signal into a received signal of the user signal, wherein each compensation signal is the retransmission signal of other satellites processed according to each channel compensation parameter.

Description

Signal receiving method and device and signal transmission system
Technical Field
The present disclosure relates to the field of wireless communications, and in particular, to a signal receiving method, a signal receiving apparatus, a signal transmission system, and a non-volatile computer-readable storage medium.
Background
Currently, the satellite communication field mainly includes two types of synchronous orbit communication and asynchronous orbit communication systems. According to international radio regulations, low-rail communication systems must circumvent synchronous-orbit communication systems.
In the related art, the low-rail communication system uses a lower transmission power to avoid interference to signals of the high-rail communication system.
Disclosure of Invention
The inventors of the present disclosure found that the following problems exist in the above-described related art: the requirement of large communication bandwidth cannot be met, and the network performance is reduced.
In view of this, the present disclosure provides a signal receiving technical solution, which can improve communication bandwidth at a lower power and improve network performance.
According to some embodiments of the present disclosure, there is provided a signal receiving method including: acquiring channel characteristics of a feeder link channel adopted when each satellite forwards signals; calculating compensation parameters of channel characteristics of other feeder link channels according to the channel characteristics of the reference feeder link channels, wherein the reference feeder link channels are feeder link channels adopted by reference satellites in the satellites, the other channel characteristics are feeder link channels adopted by other satellites in the satellites, and the compensation parameters enable the channel characteristics of the other feeder link channels to be consistent with the channel characteristics of the reference feeder link channels; and under the condition that the terminal retransmits the user signal of the terminal through each satellite, fusing the corresponding retransmission signal of the reference satellite and each compensation signal into a received signal of the user signal, wherein each compensation signal is the corresponding retransmission signal of the other satellite processed according to each channel compensation parameter.
In some embodiments, the channel characteristics of the feeder link channel used in acquiring the respective satellite transponder signal include: receiving a second reference signal corresponding to the first reference signal transmitted by each satellite through each feeder link channel; and calculating the channel characteristics of each feeder link channel according to each first reference signal and the corresponding second reference signal thereof.
In some embodiments, the compensation signals are obtained by: receiving the retransmission signals of the other satellites; and processing the forwarding signals of the other satellites according to the channel compensation parameters to generate the compensation signals.
In some embodiments, the compensation signals are obtained by: transmitting corresponding compensation parameters to the other satellites; and receiving the compensation signals which are transmitted by the other satellites and generated according to the corresponding compensation parameters.
In some embodiments, said combining the respective retransmitted signals of the reference satellites and the respective compensation signals into the received signal of the user signal comprises: and determining the received signal according to the weighted sum of the retransmission signal of the reference satellite and each compensation signal.
In some embodiments, the retransmitted signal of each satellite is a low-orbit satellite signal having a frequency lower than an interference threshold of a high-orbit satellite signal.
In some embodiments, the user signal is transmitted through an omni-directional antenna of the handheld terminal.
According to further embodiments of the present disclosure, there is provided a signal receiving apparatus including: the acquisition unit is used for acquiring the channel characteristics of the feed link channel adopted when each satellite forwards the signal; a calculating unit, configured to calculate, according to a channel characteristic of a reference feeder link channel, a compensation parameter of a channel characteristic of another feeder link channel, where the reference feeder link channel is a feeder link channel adopted by a reference satellite in each satellite, the another channel characteristic is a feeder link channel adopted by another satellite in each satellite, and the compensation parameter makes the channel characteristic of the another feeder link channel consistent with the channel characteristic of the reference feeder link channel; and the fusion unit is used for fusing the corresponding forwarding signal of the reference satellite and each compensation signal into a receiving signal of the user signal under the condition that the terminal forwards the user signal of the terminal through each satellite, wherein each compensation signal is the corresponding forwarding signal of the other satellite processed according to each channel compensation parameter.
In some embodiments, the receiving apparatus further includes a receiving unit configured to receive, through each feeder link channel, a second reference signal corresponding to the first reference signal transmitted by each satellite; the obtaining unit obtains the channel characteristics of each feeder link channel according to each first reference signal and the corresponding second reference signal.
In some embodiments, the receiving unit receives the retransmitted signals of the other satellites; the receiving device further comprises a processing unit, configured to process the forwarded signals of the other satellites according to the channel compensation parameters, and generate the compensation signals.
In some embodiments, the receiving apparatus further includes a transmitting unit, configured to transmit the corresponding compensation parameter to each of the other satellites; and the receiving unit receives the compensation signals which are transmitted by the other satellites and generated according to the corresponding compensation parameters.
In some embodiments, the fusion unit determines the received signal based on a weighted sum of the retransmitted signal of the reference satellite and each of the compensation signals.
In some embodiments, the retransmitted signal of each satellite is a low-orbit satellite signal having a frequency lower than an interference threshold of a high-orbit satellite signal.
In some embodiments, the user signal is transmitted through an omni-directional antenna of the handheld terminal.
According to still further embodiments of the present disclosure, there is provided a transmission system of a signal, including: signal receiving means for performing the signal receiving method in any of the above embodiments; a plurality of satellites for relaying user signals of the terminal to a receiving device of the signals, the coverage areas of the plurality of satellites having overlapping portions.
According to still other embodiments of the present disclosure, there is provided a signal receiving apparatus including: a memory; and a processor coupled to the memory, the processor being configured to perform the method of receiving signals in any of the above embodiments based on instructions stored in the memory device.
According to still further embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the method of receiving a signal in any of the above embodiments.
In the above embodiment, the calculated channel compensation parameters are used to compensate different feeder link channels, so as to ensure that the channel characteristics of each feeder link channel are consistent; when the channel characteristics are consistent, a plurality of retransmission signals corresponding to the same user signal are merged into a single reception signal. Therefore, the communication bandwidth can be improved on the premise of not improving the signal power of the user, and the network performance is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
fig. 1 shows a flow chart of some embodiments of a method of receiving a signal of the present disclosure;
FIG. 2 illustrates a flow diagram of some embodiments of step 110 of FIG. 1;
fig. 3 shows a flow chart of further embodiments of a method of receiving a signal of the present disclosure;
fig. 4 shows a block diagram of some embodiments of a receiving apparatus of signals of the present disclosure;
fig. 5 shows a block diagram of further embodiments of a receiving apparatus of signals of the present disclosure;
fig. 6 shows a block diagram of further embodiments of a receiving apparatus of signals of the present disclosure;
fig. 7 illustrates a block diagram of some embodiments of a transmission system of signals of the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
As mentioned above, in order to avoid interference to signals of the high-rail broadband communication system, the terminal of the low-rail broadband communication system is mainly in the form of a non-handheld terminal (e.g., a terminal fixed to a carrier such as a vehicle or a building) using a planar antenna. The beam angle of the planar antenna is small, and enough communication speed can be achieved only when the planar antenna is just aligned to a satellite; through the design of a satellite system, the low-orbit broadband communication system can adopt methods such as 'progressive pitching', 'beam switching' and the like, so that the isolation angle between a terminal of the low-orbit broadband communication system and a high-low orbit satellite meets the interference avoidance requirement.
On one hand, however, the planar antenna cannot meet the requirement of satellite communication of the handheld terminal; on the other hand, the adoption of the omnidirectional antenna requires that the transmitting power is large enough to meet the requirement of communication bandwidth, and the requirement of high-rail interference avoidance cannot be met. In this case, if the requirement for avoiding high-rail interference is satisfied, the ground terminal transmission power needs to be reduced. The reduction of the transmission power can cause that the ground system can not effectively demodulate related signals after the signals are transmitted to the ground system through the satellite, thereby the broadband communication can not be realized.
In order to solve the technical problem, the present disclosure provides a diversity-mode signal receiving technical solution, which can implement wideband satellite communication of a handheld terminal. For example, it can be realized by the following embodiments.
Fig. 1 shows a flow chart of some embodiments of a method of receiving a signal of the present disclosure.
As shown in fig. 1, the method includes: step 110, obtaining the characteristics of each channel; step 120, calculating compensation parameters of the channel characteristics; and step 130, merging the forwarding signals.
In step 110, channel characteristics of feeder link channels employed when each satellite is relaying signals are obtained. For example, each satellite has a corresponding feeder link channel for transmitting signals to the terrestrial system. The channel characteristics are characteristics characterizing the influence of the channel on the amplitude and phase of the signal in a certain frequency band range.
In some embodiments, the terrestrial system may also calculate channel characteristics for each feeder link channel based on the reference signals transmitted by each satellite. The terrestrial system knows the correlation information (such as amplitude information, phase information, etc.) of the reference signals transmitted by each satellite at the transmission time, and thus calculates the channel characteristics based on the correlation information of each received reference signal. The frequency range of the reference signal transmitted by each satellite may encompass the full range used by the corresponding feeder link channel. Step 110 may be implemented, for example, by the embodiment in fig. 2.
FIG. 2 illustrates a flow diagram of some embodiments of step 110 of FIG. 1.
As shown in fig. 2, step 110 includes: step 1110, receiving a second reference signal; and step 1120, calculating the respective channel characteristics.
In step 1110, second reference signals corresponding to the first reference signals transmitted by the satellites are received through the feeder link channels.
In some embodiments, satellite 1 and satellite 2 transmit a first reference signal ref to the ground system via their corresponding feeder-link channel 1 and feeder-link channel 2, respectively 1 And a first reference signal ref 2 (ii) a The terrestrial system receives the second parameters from the feeder link channel 1 and the feeder link channel 2, respectivelyExamination signal o 1 And a second reference signal o 2 。o i ＝h i ×ref i I is 1 or 2, h i Is the channel characteristic function (channel characteristic) of the feeder link channel i. In this way it is possible to obtain,
in step 1120, channel characteristics for each feeder-link channel are calculated based on each first reference signal and its corresponding second reference signal.
In some embodiments, according to known o i And ref i Then the corresponding h can be calculated i . For example, an approximation function of the channel characteristic function may be obtained as the channel characteristic by fitting according to the reception of a plurality of reference signals.
After the channel characteristics are calculated, the signals may be further received through other steps in fig. 1.
In step 120, compensation parameters for channel characteristics of other feeder-link channels are calculated based on the channel characteristics of the reference feeder-link channel. The compensation parameters cause channel characteristics of the other feeder link channels to coincide with channel characteristics of the reference feeder link channel.
For example, the reference feeder link channel is a feeder link channel employed by a reference satellite of the satellites; the other channel characteristics are feeder link channels employed by other ones of the satellites.
In step 130, in case the terminal retransmits its user signal via said each satellite, the corresponding retransmission signal of the reference satellite and each compensation signal are merged into a received signal of the user signal. Each compensation signal is a corresponding retransmission signal of other satellites processed according to each channel compensation parameter. For example, the user signal is transmitted through an omni-directional antenna of the handheld terminal.
The corresponding retransmission signals are retransmission signals corresponding to the user signals retransmitted by the satellites to the ground system.
In some embodiments, the retransmitted signal for each satellite is a low-orbit satellite signal having a frequency below an interference threshold of a high-orbit satellite signal.
In some embodiments, satellite 1 may be determined to be the reference satellite and satellite 2 may be the reference satelliteHis satellite. Satellite 2 transmits ref over feeder link channel 2 i The terrestrial system receives o via feeder link channel 2 2 Can be characterized as o 2 ＝h 2 ×ref 2 ＝h 1 ×Δ 2 ×ref 2 。Δ 2 The parameters are compensated for the channel of feeder link channel 2 relative to feeder link channel 1.
That is, using Δ 2 To h 2 Is treated to obtain h 1 . According to the known o 2 、h 1 And ref 2 Δ can be calculated 2 。
In some embodiments, the compensation signal may be generated by the surface system by the embodiment in fig. 3.
Fig. 3 shows a flow chart of further embodiments of a method of receiving a signal of the present disclosure.
As shown in fig. 3, on the basis of any of the above embodiments, the method further includes: step 310, receiving each forwarding signal; and step 320, generating each compensation signal.
In step 310, the retransmitted signals of each of the other satellites are received.
In step 320, the retransmission signals of the other satellites are processed according to the channel compensation parameters to generate compensation signals.
In some embodiments, compensation processing may also be performed by each satellite to generate a compensation signal: transmitting corresponding compensation parameters to other satellites; and receiving compensation signals which are transmitted by other satellites and generated according to corresponding compensation parameters.
In some embodiments, there are multiple low-earth satellites (satellite 1, satellite 2) within the range of the antenna of the user terminal, and these low-earth satellites may all be connected to the same terrestrial reception system. For example, the positions of the user terminal, each low-orbit satellite and the ground receiving system at a certain moment can be uniquely determined through the early operation of the system; through the satellite time synchronization module, time synchronization among the satellites can be achieved.
In some embodiments, the user terminal is located in the overlapping coverage area of satellite 1 and satellite 2 and transmits a desired signal (user signal) to satellite 1 and satellite 2 over the user link. For example, since the low-orbit communication system must avoid interference with the synchronous orbit communication system (high-orbit communication system), the power of the useful signal is low enough (below the interference threshold of the high-orbit satellite signal) that its interference with the high-orbit satellite system is within an allowable range.
The useful signal is processed by the satellite 1 and the satellite 2 (for example, after frequency conversion) and then converted into a corresponding retransmission signal s 1 And s 2 . Signals s transmitted by subscriber terminals via feeder links of respective low-earth satellites 1 And s 2 The power is low, and the ground system cannot realize the normal communication of the user terminal.
In this case, the satellite 1 transmits a retransmission signal s to the terrestrial system via the feeder link channel 1 1 The terrestrial system receives a corresponding signal r via the feeder link channel 1 1 (ii) a Ground system according to h 1 Can obtain the forwarding signal s 1 ，s 1 Has a corresponding relationship with the useful signal.
In some embodiments, satellite 2 may utilize Δ 2 To s 2 Generating a compensation signal s 'after compensation' 2 And will compensate signal s' 2 To ground systems, s 2 Corresponding to the useful signal; the ground system receives a corresponding signal r 'over feeder link channel 1' 2 According to h 2 A compensation signal s 'can be obtained' 2 。
In some embodiments, satellite 2 may also associate s with 2 To the ground system, which receives a corresponding retransmission signal r via the feeder link channel 2 2 (ii) a Ground system according to h 2 Can obtain s 2 (ii) a Land system utilization of delta 2 For transmitting signal s 2 Compensating to generate a compensation signal s' 2 。
For example, the received signal may be determined based on a weighted sum of the retransmitted signal of the reference satellite and each of the compensation signals. The weight value can be selected according to the actual condition of the system.
Thus, energy aggregation of the received signals by a plurality of satellites can be realized. Because each channel is independent (incoherent), the signal-to-noise ratio of the received signal after the energy aggregation processing is improved, and the diversity reception is enhanced. The power of the processed received signal can meet the demodulation requirement, and effective signal receiving is realized.
In some embodiments, the signal transmission system may include a terrestrial system (receiving device with signal installed), a plurality of low earth orbit satellites, and a user terminal. The transmission system of signals may include: the satellite time synchronization module is arranged on the low-orbit satellite; the channel measurement and compensation module is arranged on a low-orbit satellite or a ground system; and the signal diversity receiving processing module is arranged on the ground system.
The ground system can communicate with the satellite in a certain area through the satellite feeder link to receive the relevant signal and process the relevant signal. The same terrestrial system may receive feeder link signals for a plurality of satellites.
The low earth orbit satellite can receive the signal sent by the user terminal through the satellite user link, and send the signal to the ground receiving system through the satellite feeder link after carrying out frequency conversion. The user links of each satellite form a certain coverage area on the ground, and the coverage areas have an overlapping area. That is, there are multiple satellites in view (available) in the area served by the satellite system.
A user terminal transmits and receives signals to and from space through an omni-directional antenna and is capable of establishing user links with multiple satellites. The signal transmitted by the user terminal is low enough so that it interferes with the high orbit satellite less than a threshold. At this time, the signal forwarded by the ue to the ground receiving system via a single satellite cannot be effectively received.
The satellite time synchronization module can perform time synchronization among the satellites.
The channel measurement and compensation module may measure the satellite feeder link channel and calculate a channel measurement matrix compensation value (channel compensation parameter) for compensating signals forwarded by the user link to the feeder link by the satellite. The compensation results can make the channel characteristics of each satellite feeder link participating in diversity reception completely consistent.
The signal diversity reception and processing module can receive a plurality of feeder link signals of the same user terminal forwarded by a plurality of satellites simultaneously (fusion enhancement). Generally, the received channels from the satellites to the corresponding user terminals are different, and the processing module can perform space diversity enhancement on the signals which are not correlated with the multiple channels, so that the signals transmitted by the user terminals can be effectively received by the terrestrial receiving system.
Fig. 4 illustrates a block diagram of some embodiments of a receiving device of signals of the present disclosure.
As shown in fig. 4, the receiving apparatus 4 of the signal includes an acquisition unit 41, a calculation unit 42, and a fusion unit 43.
The acquisition unit 41 acquires the channel characteristics of the feeder link channel employed when each satellite retransmits a signal.
In some embodiments, the receiving apparatus 4 further includes a receiving unit 44 for receiving a second reference signal corresponding to the first reference signal transmitted by each satellite through each feeder link channel. The obtaining unit 41 obtains the channel characteristics of each feeder link channel according to each first reference signal and its corresponding second reference signal.
The calculation unit 42 calculates compensation parameters for the channel characteristics of the other feeder link channels based on the channel characteristics of the reference feeder link channel. The reference feeder link channel is a feeder link channel employed by a reference satellite of the satellites. The other channel characteristics are feeder link channels employed by other ones of the satellites. The compensation parameters cause channel characteristics of the other feeder link channels to coincide with channel characteristics of the reference feeder link channel.
When the terminal retransmits its user signal via each satellite, the fusion unit 43 fuses the retransmission signal of the reference satellite and each compensation signal into a reception signal of the user signal. Each compensation signal is a retransmission signal of other satellites processed according to each channel compensation parameter.
In some embodiments, the fusion unit 43 determines the received signal based on a weighted sum of the retransmitted signal of the reference satellite and each of the compensation signals.
In some embodiments, the receiving unit 44 receives the retransmitted signals of each of the other satellites; the receiving apparatus 4 further comprises a processing unit 45, configured to process the forwarded signals of the other satellites according to the channel compensation parameters, so as to generate compensation signals.
In some embodiments, the receiving apparatus 4 further comprises a transmitting unit 46 for transmitting the respective compensation parameters to each of the other satellites; the receiving unit 44 receives the compensation signals retransmitted by each of the other satellites and generated according to the corresponding compensation parameters.
In some embodiments, the retransmitted signal for each satellite is a low-orbit satellite signal having a frequency below an interference threshold of a high-orbit satellite signal.
In some embodiments, the user signal is transmitted through an omni-directional antenna of the handheld terminal.
Fig. 5 shows a block diagram of further embodiments of a device for receiving signals of the present disclosure.
As shown in fig. 5, the signal receiving apparatus 5 of this embodiment includes: a memory 51 and a processor 52 coupled to the memory 51, the processor 52 being configured to execute the signal receiving method in any one of the embodiments of the present disclosure based on instructions stored in the memory 51.
The memory 51 may include, for example, a system memory, a fixed nonvolatile storage medium, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), a database, and other programs.
Fig. 6 shows a block diagram of further embodiments of a receiving apparatus of signals of the present disclosure.
As shown in fig. 6, the signal receiving apparatus 6 of this embodiment includes: a memory 610 and a processor 620 coupled to the memory 610, wherein the processor 620 is configured to execute the signal receiving method in any one of the foregoing embodiments based on instructions stored in the memory 610.
The memory 610 may include, for example, system memory, fixed non-volatile storage media, and the like. The system memory stores, for example, an operating system, an application program, a Boot Loader (Boot Loader), and other programs.
The signal receiving apparatus 6 may further include an input-output interface 630, a network interface 640, a storage interface 650, and the like. These interfaces 630, 640, 650 and the memory 610 and the processor 620 may be connected by a bus 860, for example. The input/output interface 630 provides a connection interface for input/output devices such as a display, a mouse, a keyboard, and a touch screen. The network interface 640 provides a connection interface for various networking devices. The storage interface 650 provides a connection interface for external storage devices such as an SD card and a usb disk.
Fig. 7 illustrates a block diagram of some embodiments of a transmission system of signals of the present disclosure.
As shown in fig. 7, the signal transmission system 7 includes: a signal receiving means 71 for performing the signal receiving method in any of the above embodiments; a plurality of satellites 72 for relaying the user signals of the terminal to the signal receiving means 71. The coverage areas of the plurality of satellites 72 have overlapping portions.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Up to this point, a signal receiving method, a signal receiving apparatus, a signal transmission system, and a nonvolatile computer readable storage medium according to the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The method and system of the present disclosure may be implemented in a number of ways. For example, the methods and systems of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the foregoing examples are for purposes of illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (11)

1. A method of receiving a signal, comprising:
acquiring channel characteristics of a feeder link channel adopted when each satellite forwards signals;
calculating compensation parameters of channel characteristics of other feeder link channels according to the channel characteristics of the reference feeder link channels, wherein the reference feeder link channels are feeder link channels adopted by reference satellites in the satellites, the other channel characteristics are feeder link channels adopted by other satellites in the satellites, and the compensation parameters enable the channel characteristics of the other feeder link channels to be consistent with the channel characteristics of the reference feeder link channels;
and under the condition that the terminal retransmits the user signal of the terminal through each satellite, fusing the corresponding retransmission signal of the reference satellite and each compensation signal into a received signal of the user signal, wherein each compensation signal is the corresponding retransmission signal of the other satellite processed according to each channel compensation parameter.
2. The receiving method according to claim 1, wherein the acquiring the channel characteristics of the feeder link channel adopted when each satellite forwards the signal comprises:
receiving a second reference signal corresponding to the first reference signal transmitted by each satellite through each feeder link channel;
and calculating the channel characteristics of each feeder link channel according to each first reference signal and the corresponding second reference signal thereof.
3. The receiving method according to claim 1, wherein each of the compensation signals is obtained by:
receiving the retransmission signals of the other satellites;
and processing the forwarding signals of the other satellites according to the channel compensation parameters to generate the compensation signals.
4. The receiving method according to claim 1, wherein each of the compensation signals is obtained by:
transmitting corresponding compensation parameters to the other satellites;
and receiving the compensation signals which are transmitted by the other satellites and generated according to the corresponding compensation parameters.
5. The receiving method of claim 1, wherein the merging of the respective repeated signals of the reference satellite and the respective compensation signals into the received signal of the user signal comprises:
and determining the received signal according to the weighted sum of the retransmission signal of the reference satellite and each compensation signal.
6. The receiving method according to any of claims 1-5,
the forwarding signals of the satellites are low-orbit satellite signals, and the frequency of the low-orbit satellite signals is lower than the interference threshold of the high-orbit satellite signals.
7. The receiving method according to any of claims 1-5,
and the user signal is sent through an omnidirectional antenna of the handheld terminal.
8. A signal receiving apparatus, comprising:
the acquisition unit is used for acquiring the channel characteristics of the feed link channel adopted when each satellite forwards the signal;
a calculating unit, configured to calculate, according to a channel characteristic of a reference feeder link channel, a compensation parameter of a channel characteristic of another feeder link channel, where the reference feeder link channel is a feeder link channel adopted by a reference satellite in each satellite, the another channel characteristic is a feeder link channel adopted by another satellite in each satellite, and the compensation parameter makes the channel characteristic of the another feeder link channel consistent with the channel characteristic of the reference feeder link channel;
and the fusion unit is used for fusing the forwarding signal of the reference satellite and each compensation signal into a receiving signal of the user signal under the condition that the terminal forwards the user signal of the terminal through each satellite, wherein each compensation signal is the forwarding signal of the other satellite processed according to each channel compensation parameter.
9. A system for transmission of signals, comprising:
receiving means of a signal for performing the method of receiving a signal according to any one of claims 1 to 7;
a plurality of satellites for relaying user signals of the terminal to a receiving device of the signals, the coverage areas of the plurality of satellites having overlapping portions.
10. A signal receiving apparatus, comprising:
a memory; and
a processor coupled to the memory, the processor being configured to perform the method of receiving a signal of any of claims 1-7 based on instructions stored in the memory.
11. A non-transitory computer-readable storage medium on which a computer program is stored, which program, when executed by a processor, implements a method of receiving a signal as claimed in any one of claims 1 to 7.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993009613A1 (en) * 1991-10-28 1993-05-13 Calling Communications Corporation Satellite communication system
WO1999037033A1 (en) * 1998-01-20 1999-07-22 Viasat, Inc. Self-interference cancellation for relayed communication networks
US6571104B1 (en) * 1999-09-07 2003-05-27 Lucent Technologies Inc. Power control with effective Eb/N0
CN103501193A (en) * 2007-08-20 2014-01-08 瑞登有限责任公司 Method for compensating for MU-MAS and dynamically adapting to MU-MAS
CN106357323A (en) * 2016-10-08 2017-01-25 航天恒星科技有限公司 Satellite channel group delay compensation method and device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993009613A1 (en) * 1991-10-28 1993-05-13 Calling Communications Corporation Satellite communication system
WO1999037033A1 (en) * 1998-01-20 1999-07-22 Viasat, Inc. Self-interference cancellation for relayed communication networks
US6571104B1 (en) * 1999-09-07 2003-05-27 Lucent Technologies Inc. Power control with effective Eb/N0
CN103501193A (en) * 2007-08-20 2014-01-08 瑞登有限责任公司 Method for compensating for MU-MAS and dynamically adapting to MU-MAS
CN106357323A (en) * 2016-10-08 2017-01-25 航天恒星科技有限公司 Satellite channel group delay compensation method and device

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Carrier compensation mode implementation in;I.N. Ryzhenko et al.;《 2019 International Siberian Conference on Control and Communications (SIBCON)》;20190606;全文 *
Lutz信道模型下卫星CDMA系统的容量分析;王雅慧等;《无线电通信技术》;20171229(第01期);全文 *
MIMO技术在卫星通信系统中的应用;张千等;《空间电子技术》;20180225(第01期);全文 *

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