CN116470956B - Channel tracking method and system for backtracking time-frequency signal in non-guiding mode - Google Patents
Channel tracking method and system for backtracking time-frequency signal in non-guiding mode Download PDFInfo
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Abstract
The invention provides a channel tracking method and a system for backtracking a time-frequency signal in a non-guiding mode, and relates to the technical field of information systems. The invention transmits unidirectional channel signaling through unidirectional channels of fixed frequency points, and the unidirectional channel signaling records subordinate broadcast channel basic information; only the satellite communication receiver continuously scans the unidirectional channel at the fixed frequency point, and when the basic information of the broadcast channel is successfully received, the hardware resource is called to load the broadcast channel; receiving and analyzing broadcast content through a broadcast channel, wherein the broadcast content is recorded with basic information of a service channel; the satellite communication receiver carries out continuous tracking identification on the broadcast channel, and after the basic information of the service channel is successfully received, hardware resources are called to load the service channel; the receiver can quickly and efficiently find the frequency point in communication and track the channel under the condition of limited channel resources, and the occupation of system resources is reduced.
Description
Technical Field
The invention relates to the technical field of information systems, in particular to a channel tracking method and a system for backtracking a time-frequency signal in a non-guiding mode.
Background
Low-orbit satellite communication systems are an important area in modern communication technology, which can facilitate communication worldwide. However, the low-orbit satellites constantly change positions during operation; therefore, in order to guarantee the coverage of the ground, the low-orbit satellite communication system often needs to adopt a multi-satellite multi-beam scheme.
The multi-star multi-beam scheme aims to maximize the coverage of the ground and improve the communication stability. In this approach, multiple satellites are used simultaneously, each equipped with multiple antenna beams to cover a wider ground area. The design can realize global coverage of the low-orbit satellite communication system, and meanwhile, the reliability and the stability of communication are improved.
In a multi-star multi-beam system, the receiver is a very critical component; in order to realize multi-frequency point coverage, a receiver generally needs to adopt a multi-channel tracking technology, and the existing multi-channel tracking technology can track a plurality of channels according to frequency point division of a system and record all frequency point information so as to monitor the channel state and ensure the stability of communication.
However, the existing multi-channel tracking technology needs to consume a large amount of resources, thereby causing resource waste of the system; in this case, how to effectively utilize limited resources and improve the efficiency and performance of the system has become an important point of research.
Therefore, it is necessary to provide a channel tracking method and system for backtracking time-frequency signals in a non-pilot mode to solve the above technical problems.
Disclosure of Invention
In order to solve one of the above technical problems, the present invention provides a channel tracking system for backtracking a time-frequency signal in a non-guided manner, which is deployed in a low-orbit satellite communication system, and includes: a multi-satellite multi-beam system and a satellite communication receiver; the satellite communication receiver tracks satellite communication services of the multi-satellite multi-beam system through a time-frequency signal in a non-guiding mode;
the multi-satellite multi-beam system provides communication service through a plurality of low-orbit satellites, and each low-orbit satellite can send satellite signals in a communication channel of a specific frequency point so as to realize the processing of the communication service; wherein the communication channel comprises: unidirectional channels, broadcast channels, and traffic channels; the unidirectional channel is a fixed frequency point channel; the broadcast channel and the traffic channel are variable frequency point channels;
a satellite communications receiver for data tracking of satellite communications traffic, comprising: the system comprises a signal receiving module, a channel adjusting module, a signal detecting module, a signal analyzing module, a service request module and a communication control module; the signal receiving module is respectively and electrically connected with the channel adjusting module, the signal detecting module and the service request module, and the signal analyzing module is electrically connected with the signal detecting module; the communication control module is electrically connected with the channel adjusting module, the signal analyzing module and the service request module in a distributed manner.
A channel tracking method for time-frequency signal backtracking in a non-guiding mode is applied to a channel tracking system for time-frequency signal backtracking in the non-guiding mode, and is characterized in that the multi-star multi-beam system comprises the following steps: recording subordinate broadcast channel basic information by each low orbit satellite through unidirectional channel signaling, and transmitting unidirectional channel signaling by using unidirectional downlink channels of fixed frequency points; each low orbit satellite records corresponding business channel basic information through broadcast channel content, and uses a broadcast channel corresponding to a broadcast frequency point to send the broadcast channel content; each low orbit satellite uploads and downloads service data of corresponding service through a designated service channel, and uses a time-frequency signal as a transmission carrier of the service data;
satellite communication receiver: continuously detecting signals of a unidirectional downlink channel of a fixed frequency point, and receiving and analyzing unidirectional channel signaling when satellite signals are found out to obtain basic information of a broadcast channel; the satellite communication receiver adjusts a receiving channel according to the basic information of the broadcasting channel, collects the content of the broadcasting channel transmitted by the broadcasting channel, and analyzes the content of the broadcasting channel to obtain the basic information of the service channel; the satellite communication receiver continuously tracks and analyzes the signals of the service channels according to the basic information of the service channels, and realizes the data tracking of satellite communication services.
As a still further solution, the satellite communication receiver receives unidirectional channel signaling by:
each low-orbit satellite transmits satellite signals in a unidirectional channel of a fixed frequency point; wherein the satellite signal is a discontinuous burst signal;
the communication control module acquires a receiving frequency point, wherein the receiving frequency point is a corresponding fixed frequency point of a unidirectional channel;
the channel adjustment module adjusts the receiving frequency point of the signal receiving module and receives satellite signals of the fixed frequency point channel;
the signal analysis module performs A/D sampling and digital down-conversion processing on the satellite signals to obtain data analysis signals;
the signal detection module is used for carrying out data detection on the data analysis signal, wherein the data analysis signal is a discontinuous burst signal;
when the effective data mark is detected, starting unidirectional channel signaling analysis to obtain basic information of a broadcast channel;
when the valid data mark is not detected, readjusting the receiving frequency point, and executing signal receiving, analyzing and detecting again;
repeating the above steps until the basic information of the broadcast channel is successfully obtained or the communication service is requested to end.
As a further solution, the UW code is used as a valid data flag, the start bit of the valid data is marked by the UW code, and the signal detection module determines whether the valid data flag is present and available by performing burst validity detection on the UW code.
As a further solution, the satellite communication receiver receives the traffic channel basic information by the steps of;
judging whether the basic information of the broadcast channel is successfully acquired or not, and executing the next step when the basic information of the broadcast channel is successfully acquired;
analyzing the basic information of the broadcast channel to obtain the frequency point where the broadcast channel is located and the time slot information;
the channel adjusting module adjusts the receiving frequency point of the signal receiving module to the frequency point where the broadcasting channel is located according to the frequency point information;
judging whether the broadcast channel content is successfully acquired or not:
if the acquisition is successful, content analysis is carried out to obtain basic information of the service channel;
and if the acquisition fails, releasing the hardware channel resources.
As a further solution, the satellite communication receiver determines whether a service channel is available by:
judging whether the basic information of the service channel is successfully acquired or not, and executing the next step when the basic information of the service channel is successfully acquired;
analyzing the basic information of the service channel to obtain the frequency point where the service channel is located and the time slot information; wherein the service channel comprises an uplink service channel and a downlink service channel; the frequency points comprise an uplink frequency point and a downlink frequency point; the time slot information comprises an uplink time slot number and a downlink time slot number;
the channel adjusting module adjusts the receiving frequency point of the signal receiving module to the uplink frequency point of the uplink service and the downlink frequency point of the downlink service according to the frequency point information;
judging whether signals exist in the uplink and downlink service channels or not:
if the signal exists, a service channel is available;
if no signal exists, signal detection is carried out again;
and if the signal is not detected still within a certain time, the service channel is not available, and the hardware channel resource is released.
As a further solution, the satellite communication receiver performs data reception of the satellite communication service by:
judging whether the service channel is available or not, and executing the next step when the service channel is available;
receiving satellite communication service data according to the service request module;
when receiving service downlink data is requested:
continuously tracking a downlink frequency point where a service channel is located, and receiving satellite signals in a downlink time slot number;
carrying out A/D sampling and digital down-conversion processing on satellite signals through a signal analysis module to obtain service downlink data;
when receiving service uplink data is requested:
continuously tracking an uplink frequency point where a service channel is located, and receiving a terminal signal in an uplink time slot number;
and carrying out A/D sampling and digital down-conversion processing on the terminal signal through a signal analysis module to obtain service uplink data.
As a still further solution, hardware channel resources are released: resetting and emptying a hardware channel occupied by the current frequency point, entering an idle state, and calling again after the subsequent unidirectional channel detects the effective frequency point.
Compared with the related art, the channel tracking method and system for backtracking the time-frequency signal in the non-guiding mode have the following beneficial effects:
the invention transmits unidirectional channel signaling through unidirectional channels of fixed frequency points, and the unidirectional channel signaling records subordinate broadcast channel basic information; the satellite communication receiver analyzes the unidirectional channel signaling to obtain basic information of a broadcast channel, and adjusts a receiving channel according to the basic information of the broadcast channel; the multi-satellite multi-beam system performs multi-frequency point broadcasting through a broadcasting channel, and the broadcasting content is recorded with basic information of a service channel; the satellite communication receiver acquires basic information of a service channel by continuously tracking and identifying a broadcast channel and adjusts a receiving channel so as to switch to the service channel; the reception of the service data can be performed through the service channel.
The invention does not need to track all channels simultaneously, only needs the satellite communication receiver to scan the unidirectional channel continuously at the fixed frequency point, only calls hardware resources to load the broadcast channel when the basic information of the broadcast channel is successfully received, and calls the hardware resources to load the service channel after the basic information of the service channel is successfully received; compared with the prior art, the receiver can quickly and efficiently find the frequency point in communication and track the channel under the condition of limited channel resources, so that the occupation of system resources is reduced under the condition of ensuring that the system functions are not lost.
Drawings
FIG. 1 is a schematic diagram of a channel tracking system for time-frequency signal backtracking in a non-pilot mode according to the present invention;
fig. 2 is a flowchart of a channel tracking method for backtracking a time-frequency signal in a non-pilot mode according to an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the drawings and embodiments.
As shown in fig. 1, the channel tracking system for backtracking a time-frequency signal in a non-guided manner provided in this embodiment is deployed in a low-orbit satellite communication system, and includes: a multi-satellite multi-beam system and a satellite communication receiver; the satellite communication receiver tracks satellite communication services of the multi-satellite multi-beam system through a time-frequency signal in a non-guiding mode;
the multi-satellite multi-beam system provides communication service through a plurality of low-orbit satellites, and each low-orbit satellite can send satellite signals in a communication channel of a specific frequency point so as to realize the processing of the communication service; wherein the communication channel comprises: unidirectional channels, broadcast channels, and traffic channels; the unidirectional channel is a fixed frequency point channel; the broadcast channel and the traffic channel are variable frequency point channels;
a satellite communications receiver for data tracking of satellite communications traffic, comprising: the system comprises a signal receiving module, a channel adjusting module, a signal detecting module, a signal analyzing module, a service request module and a communication control module; the signal receiving module is respectively and electrically connected with the channel adjusting module, the signal detecting module and the service request module, and the signal analyzing module is electrically connected with the signal detecting module; the communication control module is electrically connected with the channel adjusting module, the signal analyzing module and the service request module in a distributed manner.
As shown in fig. 2, a channel tracking method for time-frequency signal backtracking in a non-guiding manner is applied to a channel tracking system for time-frequency signal backtracking in a non-guiding manner, and is characterized in that: recording subordinate broadcast channel basic information by each low orbit satellite through unidirectional channel signaling, and transmitting unidirectional channel signaling by using unidirectional downlink channels of fixed frequency points; each low orbit satellite records corresponding business channel basic information through broadcast channel content, and uses a broadcast channel corresponding to a broadcast frequency point to send the broadcast channel content; each low orbit satellite uploads and downloads service data of corresponding service through a designated service channel, and uses a time-frequency signal as a transmission carrier of the service data;
satellite communication receiver: continuously detecting signals of a unidirectional downlink channel of a fixed frequency point, and receiving and analyzing unidirectional channel signaling when satellite signals are found out to obtain basic information of a broadcast channel; the satellite communication receiver adjusts a receiving channel according to the basic information of the broadcasting channel, collects the content of the broadcasting channel transmitted by the broadcasting channel, and analyzes the content of the broadcasting channel to obtain the basic information of the service channel; the satellite communication receiver continuously tracks and analyzes the signals of the service channels according to the basic information of the service channels, and realizes the data tracking of satellite communication services.
It should be noted that: the multi-star multi-beam system of the embodiment transmits unidirectional channel signaling through a unidirectional channel of a fixed frequency point, and the unidirectional channel signaling records subordinate broadcast channel basic information; the satellite communication receiver analyzes the unidirectional channel signaling to obtain basic information of a broadcast channel, and adjusts a receiving channel according to the basic information of the broadcast channel;
the multi-satellite multi-beam system performs multi-frequency point broadcasting through a broadcasting channel, and the broadcasting content is recorded with basic information of a service channel; the satellite communication receiver acquires basic information of a service channel by continuously tracking and identifying a broadcast channel and adjusts a receiving channel so as to switch to the service channel; the reception of the service data can be performed through the service channel.
According to the scheme, all channels do not need to be tracked simultaneously, only a satellite communication receiver is required to scan a unidirectional channel continuously at a fixed frequency point, only the basic information of a broadcast channel is successfully received, hardware resources are called to load the broadcast channel, and after the basic information of a service channel is successfully received, the hardware resources are called to load the service channel; compared with the prior art, the receiver can quickly and efficiently find the frequency point in communication and track the channel under the condition of limited channel resources, so that the occupation of system resources is reduced under the condition of ensuring that the system functions are not lost.
As a still further solution, the satellite communication receiver receives unidirectional channel signaling by:
each low-orbit satellite transmits satellite signals in a unidirectional channel of a fixed frequency point; wherein the satellite signal is a discontinuous burst signal;
the communication control module acquires a receiving frequency point, wherein the receiving frequency point is a corresponding fixed frequency point of a unidirectional channel;
the channel adjustment module adjusts the receiving frequency point of the signal receiving module and receives satellite signals of the fixed frequency point channel;
the signal analysis module performs A/D sampling and digital down-conversion processing on the satellite signals to obtain data analysis signals;
the signal detection module is used for carrying out data detection on the data analysis signal, wherein the data analysis signal is a discontinuous burst signal;
when the effective data mark is detected, starting unidirectional channel signaling analysis to obtain basic information of a broadcast channel;
when the valid data mark is not detected, readjusting the receiving frequency point, and executing signal receiving, analyzing and detecting again;
repeating the above steps until the basic information of the broadcast channel is successfully obtained or the communication service is requested to end.
It should be noted that: the satellite signals transmitted in the unidirectional channels of the fixed frequency points have burstiness and can be started only when the corresponding low-orbit satellites provide communication services; therefore, the satellite communication receiver can acquire a unidirectional channel for providing communication service only by scanning fixed frequency points without scanning all frequency points; and when the basic information of the broadcast channel is successfully analyzed, further performing broadcast channel scanning docking.
As a further solution, the UW code is used as a valid data flag, the start bit of the valid data is marked by the UW code, and the signal detection module determines whether the valid data flag is present and available by performing burst validity detection on the UW code.
It should be noted that: the Unique code (UW code) marks the beginning of the effective data, and the identification and extraction of the effective data can be realized by detecting the UW code.
As a further solution, the satellite communication receiver receives the traffic channel basic information by the steps of;
judging whether the basic information of the broadcast channel is successfully acquired or not, and executing the next step when the basic information of the broadcast channel is successfully acquired;
analyzing the basic information of the broadcast channel to obtain the frequency point where the broadcast channel is located and the time slot information;
the channel adjusting module adjusts the receiving frequency point of the signal receiving module to the frequency point where the broadcasting channel is located according to the frequency point information;
judging whether the broadcast channel content is successfully acquired or not:
if the acquisition is successful, content analysis is carried out to obtain basic information of the service channel;
and if the acquisition fails, releasing the hardware channel resources.
It should be noted that: in this embodiment, the broadcast channel is used to broadcast the basic information of the service channel, and the satellite communication receiver only needs to obtain the frequency point and time slot information of the service channel through the basic information of the service channel, and can determine whether the required service exists without loading all the service channels, so as to avoid the occupation of resources when loading the service channel.
As a further solution, the satellite communication receiver determines whether a service channel is available by:
judging whether the basic information of the service channel is successfully acquired or not, and executing the next step when the basic information of the service channel is successfully acquired;
analyzing the basic information of the service channel to obtain the frequency point where the service channel is located and the time slot information; wherein the service channel comprises an uplink service channel and a downlink service channel; the frequency points comprise an uplink frequency point and a downlink frequency point; the time slot information comprises an uplink time slot number and a downlink time slot number;
the channel adjusting module adjusts the receiving frequency point of the signal receiving module to the uplink frequency point of the uplink service and the downlink frequency point of the downlink service according to the frequency point information;
judging whether signals exist in the uplink and downlink service channels or not:
if the signal exists, a service channel is available;
if no signal exists, signal detection is carried out again;
and if the signal is not detected still within a certain time, the service channel is not available, and the hardware channel resource is released.
It should be noted that: the method and the device detect the availability of the service channel before the butt joint, and avoid the occupation of hardware resources caused by the unavailability of the service channel.
As a further solution, the satellite communication receiver performs data reception of the satellite communication service by:
judging whether the service channel is available or not, and executing the next step when the service channel is available;
receiving satellite communication service data according to the service request module;
when receiving service downlink data is requested:
continuously tracking a downlink frequency point where a service channel is located, and receiving satellite signals in a downlink time slot number;
carrying out A/D sampling and digital down-conversion processing on satellite signals through a signal analysis module to obtain service downlink data;
when receiving service uplink data is requested:
continuously tracking an uplink frequency point where a service channel is located, and receiving a terminal signal in an uplink time slot number;
and carrying out A/D sampling and digital down-conversion processing on the terminal signal through a signal analysis module to obtain service uplink data.
As a still further solution, hardware channel resources are released: resetting and emptying a hardware channel occupied by the current frequency point, entering an idle state, and calling again after the subsequent unidirectional channel detects the effective frequency point.
The foregoing is only illustrative of the present invention and is not to be construed as limiting the scope of the invention, and all equivalent structures or equivalent flow modifications which may be made by the teachings of the present invention and the accompanying drawings or which may be directly or indirectly employed in other related art are within the scope of the invention.
Claims (7)
1. A channel tracking system for time-frequency signal backtracking in a non-guided manner deployed in a low-orbit satellite communication system, comprising: a multi-satellite multi-beam system and a satellite communication receiver; the satellite communication receiver tracks satellite communication services of the multi-satellite multi-beam system through a time-frequency signal in a non-guiding mode;
the multi-satellite multi-beam system provides communication service through a plurality of low-orbit satellites, and each low-orbit satellite can send satellite signals in a communication channel of a specific frequency point so as to realize the processing of the communication service; wherein the communication channel comprises: unidirectional channels, broadcast channels, and traffic channels; the unidirectional channel is a fixed frequency point channel; the broadcast channel and the traffic channel are variable frequency point channels;
a satellite communications receiver for data tracking of satellite communications traffic, comprising: the system comprises a signal receiving module, a channel adjusting module, a signal detecting module, a signal analyzing module, a service request module and a communication control module; the signal receiving module is respectively and electrically connected with the channel adjusting module, the signal detecting module and the service request module, and the signal analyzing module is electrically connected with the signal detecting module; the communication control module is electrically connected with the channel adjustment module, the signal analysis module and the service request module in a distributed manner;
wherein the satellite communication receiver: continuously detecting signals of a unidirectional downlink channel of a fixed frequency point, and receiving and analyzing unidirectional channel signaling when satellite signals are found out to obtain basic information of a broadcast channel; the satellite communication receiver adjusts a receiving channel according to the basic information of the broadcasting channel, collects the content of the broadcasting channel transmitted by the broadcasting channel, and analyzes the content of the broadcasting channel to obtain the basic information of the service channel; the satellite communication receiver continuously tracks and analyzes the signal of the service channel according to the basic information of the service channel, so as to realize the data tracking of the satellite communication service;
multi-star multi-beam system: recording subordinate broadcast channel basic information by each low orbit satellite through unidirectional channel signaling, and transmitting unidirectional channel signaling by using unidirectional downlink channels of fixed frequency points; each low orbit satellite records corresponding business channel basic information through broadcast channel content, and uses a broadcast channel corresponding to a broadcast frequency point to send the broadcast channel content; and each low-orbit satellite uploads and downloads service data of corresponding service through a designated service channel, and uses a time-frequency signal as a transmission carrier of the service data.
2. The channel tracking method for time-frequency signal backtracking in a non-guiding mode is applied to the channel tracking system for time-frequency signal backtracking in a non-guiding mode as claimed in claim 1, and is characterized in that the satellite communication receiver receives unidirectional channel signaling by the following steps:
each low-orbit satellite transmits satellite signals in a unidirectional channel of a fixed frequency point; wherein the satellite signal is a discontinuous burst signal;
the communication control module acquires a receiving frequency point, wherein the receiving frequency point is a corresponding fixed frequency point of a unidirectional channel;
the channel adjustment module adjusts the receiving frequency point of the signal receiving module and receives satellite signals of the fixed frequency point channel;
the signal analysis module performs A/D sampling and digital down-conversion processing on the signal to obtain a data analysis signal;
the signal detection module is used for carrying out data detection on the data analysis signal, wherein the data analysis signal is a discontinuous burst signal;
when the effective data mark is detected, starting unidirectional channel signaling analysis to obtain basic information of a broadcast channel;
when the valid data mark is not detected, readjusting the receiving frequency point, and executing signal receiving, analyzing and detecting again;
repeating the above steps until the basic information of the broadcast channel is successfully obtained or the communication service is requested to end.
3. The method for tracing back a time-frequency signal in a non-pilot mode according to claim 2, wherein the UW code is used as a valid data flag, the start bit of the valid data is marked by the UW code, and the signal detection module determines whether the valid data flag is present and available by burst validity detection of the UW code.
4. The channel tracking method for backtracking a time-frequency signal in a non-pilot mode according to claim 2, wherein the satellite communication receiver receives the basic information of the traffic channel by;
judging whether the basic information of the broadcast channel is successfully acquired or not, and executing the next step when the basic information of the broadcast channel is successfully acquired;
analyzing the basic information of the broadcast channel to obtain the frequency point where the broadcast channel is located and the time slot information;
the channel adjusting module adjusts the receiving frequency point of the signal receiving module to the frequency point where the broadcasting channel is located according to the time slot information;
judging whether the broadcast channel content is successfully acquired or not:
if the acquisition is successful, content analysis is carried out to obtain basic information of the service channel;
and if the acquisition fails, releasing the hardware channel resources.
5. The method for tracking a channel for backtracking a time-frequency signal in a non-pilot mode according to claim 2, wherein the satellite communication receiver determines whether the service channel is available by:
judging whether the basic information of the service channel is successfully acquired or not, and executing the next step when the basic information of the service channel is successfully acquired;
analyzing the basic information of the service channel to obtain the frequency point where the service channel is located and the time slot information; wherein the service channel comprises an uplink service channel and a downlink service channel; the frequency points comprise an uplink frequency point and a downlink frequency point; the time slot information comprises an uplink time slot number and a downlink time slot number;
the channel adjusting module adjusts the receiving frequency point of the signal receiving module to the uplink frequency point of the uplink service and the downlink frequency point of the downlink service according to the frequency point information;
judging whether signals exist in the uplink and downlink service channels or not:
if the signal exists, a service channel is available;
if no signal exists, signal detection is carried out again;
and if the signal is not detected still within a certain time, the service channel is not available, and the hardware channel resource is released.
6. The method for channel tracking in backtracking of time-frequency signals in a non-guided manner as set forth in claim 5, wherein the satellite communication receiver performs data reception of the satellite communication service by:
judging whether the service channel is available or not, and executing the next step when the service channel is available;
receiving satellite communication service data according to the service request module;
when receiving service downlink data is requested:
continuously tracking a downlink frequency point where a service channel is located, and receiving satellite signals in a downlink time slot number;
carrying out A/D sampling and digital down-conversion processing on satellite signals through a signal analysis module to obtain service downlink data;
when receiving service uplink data is requested:
continuously tracking an uplink frequency point where a service channel is located, and receiving a terminal signal in an uplink time slot number;
and carrying out A/D sampling and digital down-conversion processing on the terminal signal through a signal analysis module to obtain service uplink data.
7. The method for channel tracking in backtracking of time-frequency signals in a non-guided manner according to any one of claims 4 and 5, wherein the hardware channel resource is released: resetting and emptying a hardware channel occupied by the current frequency point, entering an idle state, and calling again after the subsequent unidirectional channel detects the effective frequency point.
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5175557A (en) * | 1991-07-18 | 1992-12-29 | Motorola, Inc. | Two channel global positioning system receiver |
| US5659545A (en) * | 1994-11-15 | 1997-08-19 | Motorola, Inc. | Apparatus for mobile unit acquisition in a satellite communication system and method therefor |
| CN102187631A (en) * | 2008-08-20 | 2011-09-14 | 高通股份有限公司 | Multiple-frame offset between neighbor cells to enhance the GERAN signaling performance when power control for signaling is in use |
| CN105024748A (en) * | 2015-08-04 | 2015-11-04 | 北京理工大学 | Method and device of uplink access of satellite communication |
| WO2016090411A1 (en) * | 2014-12-09 | 2016-06-16 | University Of South Australia | Multicarrier communications system |
| CN106772470A (en) * | 2016-12-23 | 2017-05-31 | 湖南北云科技有限公司 | Satellite navigation multifrequency receiver multifrequency point time delay detection and bearing calibration, device |
| WO2018092132A1 (en) * | 2016-11-17 | 2018-05-24 | Satixfy Israel Ltd. | A method and system for satellite communication |
| CN108183758A (en) * | 2017-12-23 | 2018-06-19 | 北京卫星信息工程研究所 | A kind of low orbit satellite short data communication channel agility distribution method |
| CN110521240A (en) * | 2017-07-06 | 2019-11-29 | 索尼公司 | Wireless communications method and wireless telecom equipment |
| AU2021100688A4 (en) * | 2021-02-03 | 2021-04-22 | Tongji University | A Cluster Autonomous Coordination Method Based on GNSS Parallel Baseband Signal |
| CN113411100A (en) * | 2021-04-30 | 2021-09-17 | 中国人民解放军陆军工程大学 | Multi-sequence frequency hopping receiving and transmitting joint anti-interference method based on time-frequency coding |
| CN115299013A (en) * | 2020-03-26 | 2022-11-04 | 华为技术有限公司 | Channel tracking method and related equipment thereof |
| CN116015411A (en) * | 2022-12-16 | 2023-04-25 | 中电防务科技有限公司 | High dynamic terminal and switching method for satellite mobile communication system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8064499B2 (en) * | 2006-11-17 | 2011-11-22 | Comtech Mobile Datacom Corporation | Spread-spectrum phase and channel tracking |
| US20160127122A1 (en) * | 2014-11-04 | 2016-05-05 | Maxlinear, Inc. | Quadricorrelator carrier frequency tracking |
-
2023
- 2023-06-19 CN CN202310722540.XA patent/CN116470956B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5175557A (en) * | 1991-07-18 | 1992-12-29 | Motorola, Inc. | Two channel global positioning system receiver |
| US5659545A (en) * | 1994-11-15 | 1997-08-19 | Motorola, Inc. | Apparatus for mobile unit acquisition in a satellite communication system and method therefor |
| CN102187631A (en) * | 2008-08-20 | 2011-09-14 | 高通股份有限公司 | Multiple-frame offset between neighbor cells to enhance the GERAN signaling performance when power control for signaling is in use |
| WO2016090411A1 (en) * | 2014-12-09 | 2016-06-16 | University Of South Australia | Multicarrier communications system |
| CN105024748A (en) * | 2015-08-04 | 2015-11-04 | 北京理工大学 | Method and device of uplink access of satellite communication |
| WO2018092132A1 (en) * | 2016-11-17 | 2018-05-24 | Satixfy Israel Ltd. | A method and system for satellite communication |
| CN106772470A (en) * | 2016-12-23 | 2017-05-31 | 湖南北云科技有限公司 | Satellite navigation multifrequency receiver multifrequency point time delay detection and bearing calibration, device |
| CN110521240A (en) * | 2017-07-06 | 2019-11-29 | 索尼公司 | Wireless communications method and wireless telecom equipment |
| CN108183758A (en) * | 2017-12-23 | 2018-06-19 | 北京卫星信息工程研究所 | A kind of low orbit satellite short data communication channel agility distribution method |
| CN115299013A (en) * | 2020-03-26 | 2022-11-04 | 华为技术有限公司 | Channel tracking method and related equipment thereof |
| AU2021100688A4 (en) * | 2021-02-03 | 2021-04-22 | Tongji University | A Cluster Autonomous Coordination Method Based on GNSS Parallel Baseband Signal |
| CN113411100A (en) * | 2021-04-30 | 2021-09-17 | 中国人民解放军陆军工程大学 | Multi-sequence frequency hopping receiving and transmitting joint anti-interference method based on time-frequency coding |
| CN116015411A (en) * | 2022-12-16 | 2023-04-25 | 中电防务科技有限公司 | High dynamic terminal and switching method for satellite mobile communication system |
Non-Patent Citations (3)
| Title |
|---|
| Block-Based Kalman Channel Tracking for LEO Satellite Communication With Massive MIMO;Tong Yue et al.;《IEEE Commucation Letters》;全文 * |
| 基于卡尔曼滤波的卫星信道参数跟踪方法研究;仵国锋 季仲梅 胡捍英 刘洛琨;《信息工程大学学报》(第1期);全文 * |
| 现代化GNSS信号收发信道关键技术研究;李彩华;《中国博士学位论文全文数据库（电子期刊）》;全文 * |
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