CN114257956A - MIMO pseudo satellite system base station device - Google Patents
MIMO pseudo satellite system base station device Download PDFInfo
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- CN114257956A CN114257956A CN202111349886.7A CN202111349886A CN114257956A CN 114257956 A CN114257956 A CN 114257956A CN 202111349886 A CN202111349886 A CN 202111349886A CN 114257956 A CN114257956 A CN 114257956A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/33—Services specially adapted for particular environments, situations or purposes for indoor environments, e.g. buildings
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Abstract
The invention provides a MIMO pseudo satellite system base station device which comprises an m-channel pseudo satellite receiving module, a baseband signal processing module, a baseband signal generating module and an n-channel pseudo satellite transmitting module. The invention can simultaneously transmit m paths of pseudo satellite signals and receive n paths of pseudo satellite signals. A plurality of pseudo satellite transmitters in a single MIMO pseudo satellite base station can form an independent pseudo satellite positioning constellation to meet the requirement of small-area networking positioning; and a plurality of MIMO pseudolite base stations can realize clock reference synchronization among the base stations in a bidirectional receiving mode. The device enables the pseudo satellite positioning system to be more flexible in building and networking and lower in cost, can realize clock synchronization among a plurality of base stations, and improves the precision and stability of positioning service.
Description
Technical Field
The invention relates to a MIMO pseudo satellite system base station device, and belongs to the technical field of indoor positioning. The method is suitable for non-exposed spaces such as buildings, underground and tunnels which need to provide positioning services, and particularly aims at areas which cannot receive satellite signals, and have wide range and complex environment.
Background
With the increasing demand for positioning services, various positioning technologies are continuously developed. At present, in a wide outdoor area, technologies represented by Global Navigation Satellite Systems (GNSS) such as Beidou and GPS are gradually improved, and corresponding positioning requirements can be basically met; however, in an indoor space, because GNSS signals cannot reach a corresponding area due to the obstruction of objects such as walls, the pseudolite technology is one of important methods for solving the problem of indoor positioning.
Because of the similarity of the signal system, the pseudolite signal and the GNSS signal have good compatibility, and the indoor and outdoor positioning switching function can be better realized. However, due to the complexity of the indoor environment and the scene characteristics of the continuous blocks of different areas, a simple pseudolite transmitter has not been able to meet the requirements of high-precision stable positioning services.
The existing pseudolite system generally adopts a single-transmitting single-receiving or multiple-transmitting base station device, the former has larger networking complexity of the system, and the latter can not realize clock synchronization between base stations, so that a new indoor pseudolite base station device is needed to reduce the networking complexity and realize the clock synchronization function between the base stations.
Disclosure of Invention
The technical problem is as follows: in order to reduce the networking complexity of an indoor positioning pseudolite system and the clock synchronization among base stations, the invention provides a MIMO pseudolite system base station device which has the characteristics of multiple sending and multiple receiving. The multi-transmission system can meet the networking requirement of a single base station small area, unifies the clock reference of n pseudo satellite signals, and reduces the positioning error in the small area; the multi-receiver realizes the clock synchronization problem with other base station devices in the MIMO pseudo satellite system, and meets the requirement of providing high-precision positioning service in a large area.
The technical scheme is as follows: the method for solving the technical problems is realized by the following technical scheme:
the invention discloses a MIMO pseudo satellite system base station device, which comprises an m-channel pseudo satellite receiving module, a baseband signal processing module, a baseband signal generating module and an n-channel pseudo satellite transmitting module;
the m-channel pseudo satellite receiving module receives signals of other m pseudo satellite base stations in the same pseudo satellite network, generates m paths of digital intermediate frequency pseudo satellite signals and outputs the m paths of digital intermediate frequency pseudo satellite signals to the baseband signal processing module;
the baseband signal processing module is used for resolving navigation messages, calculating clock deviation and generating clock correction parameters according to m paths of digital intermediate frequency pseudo satellite signals output by the m-channel pseudo satellite receiving module and outputting the parameters to the baseband signal generating module;
the baseband signal generating module adjusts clock information, signal phase and time delay of the generated signal according to the clock correction parameter output by the baseband signal processing module to generate n paths of digital intermediate frequency pseudo satellite signals and outputs the n paths of digital intermediate frequency pseudo satellite signals to the n-channel pseudo satellite transmitting module;
the n-channel pseudo satellite transmitting module generates n paths of analog high-frequency pseudo satellite signals according to the n paths of digital intermediate-frequency pseudo satellite signals generated by the baseband signal generating module and broadcasts the signals.
The m-channel pseudo satellite receiving module comprises m groups of pseudo satellite receiving antennas and a radio frequency front end chip; the m groups of pseudo satellite receiving antennas receive signals of other m pseudo satellite base stations in the same pseudo satellite network through different positions, and output the received pseudo satellite signals to a radio frequency front end chip; after receiving the high-frequency pseudolite analog signal, the radio frequency front end performs down-conversion and analog-to-digital conversion to generate a digital intermediate-frequency pseudolite signal and outputs the digital intermediate-frequency pseudolite signal to the baseband signal processing module.
The baseband signal processing module comprises a capturing and tracking module, a clock deviation calculation module and a clock correction parameter generation module; the acquisition tracking module settles navigation messages according to the digital intermediate frequency pseudo satellite signals and outputs the navigation messages to the clock deviation calculation module; the clock deviation calculation module calculates clock deviation data of the clock deviation calculation module and other m base stations in the same pseudo-satellite group network according to the input navigation message and outputs the clock deviation data to the clock correction parameter generation module; the clock correction parameter generation module calculates the clock correction parameter of the base station according to the input clock deviation data of the m base stations and the preselected clock reference and outputs the clock correction parameter to the baseband signal generation module.
The baseband signal generation module comprises a navigation message generation module, a spread spectrum modulation module and an intermediate frequency carrier generation module; the navigation message generation module generates n paths of pseudo satellite navigation messages according to the clock correction parameters and outputs the n paths of pseudo satellite navigation messages to the spread spectrum modulation module; the spread spectrum modulation module adjusts the pseudo code phase according to the clock correction parameter, and respectively carries out spread spectrum modulation with the n paths of pseudo satellite navigation messages and outputs the pseudo code phase and the n paths of pseudo satellite navigation messages to the intermediate frequency carrier generation module; and the intermediate frequency carrier generation module adjusts the phase of the original carrier according to the clock correction parameters, and modulates n paths of spread spectrum signals to n paths of intermediate frequency carriers respectively and outputs the n paths of spread spectrum signals to the n-channel pseudolite transmitting module.
The n-channel pseudo satellite transmitting module comprises a radio frequency front end chip and n groups of pseudo satellite transmitting antennas; the radio frequency front-end chip carries out up-conversion and digital-to-analog conversion according to the n paths of intermediate frequency carriers, and outputs n paths of high-frequency analog pseudo satellite signals to n groups of pseudo satellite transmitting antennas respectively; the n groups of pseudo satellite transmitting antennas broadcast the high-frequency analog pseudo satellite signals after receiving the signals, and the transmission of the base station signals is realized.
Has the advantages that: compared with the prior art, the invention has the following advantages:
the MIMO pseudo satellite system base station device has the characteristics of multiple sending and multiple receiving. The multi-transmission system can meet the networking requirement of a single base station small area, unifies the clock reference of n pseudo satellite signals, and reduces the positioning error in the small area; the multi-receiver realizes the clock synchronization problem with other base station devices in the MIMO pseudo satellite system, and meets the requirement of providing high-precision positioning service in a large area.
Drawings
FIG. 1 is a signal transmission diagram of a MIMO pseudolite system base station apparatus of the present invention;
fig. 2 is a block diagram of a MIMO pseudolite base station apparatus according to the present invention.
Detailed Description
The following detailed description of the embodiments of the invention is provided in connection with the accompanying drawings.
Example 1:
as shown in fig. 1, a MIMO pseudolite system base station apparatus of the present embodiment includes an m-channel pseudolite receiving module, a baseband signal processing module, a baseband signal generating module, and an n-channel pseudolite transmitting module;
the m-channel pseudo satellite receiving module receives signals of other m pseudo satellite base stations in the same pseudo satellite network, generates m paths of digital intermediate frequency pseudo satellite signals and outputs the m paths of digital intermediate frequency pseudo satellite signals to the baseband signal processing module;
the baseband signal processing module is used for resolving navigation messages, calculating clock deviation and generating clock correction parameters according to m paths of digital intermediate frequency pseudo satellite signals output by the m-channel pseudo satellite receiving module and outputting the parameters to the baseband signal generating module;
the baseband signal generating module adjusts clock information, signal phase and time delay of the generated signal according to the clock correction parameter output by the baseband signal processing module to generate n paths of digital intermediate frequency pseudo satellite signals and outputs the n paths of digital intermediate frequency pseudo satellite signals to the n-channel pseudo satellite transmitting module;
the n-channel pseudo satellite transmitting module generates n paths of analog high-frequency pseudo satellite signals according to the n paths of digital intermediate-frequency pseudo satellite signals generated by the baseband signal generating module and broadcasts the signals.
As shown in fig. 2, the modules of a MIMO pseudolite base station apparatus are as follows:
the m-channel pseudo satellite receiving module comprises m groups of pseudo satellite receiving antennas and a radio frequency front end chip; the m groups of pseudo satellite receiving antennas receive signals of other m pseudo satellite base stations in the same pseudo satellite network through different positions, and output the received pseudo satellite signals to a radio frequency front end chip; after receiving the high-frequency pseudolite analog signal, the radio frequency front end performs down-conversion and analog-to-digital conversion to generate a digital intermediate-frequency pseudolite signal and outputs the digital intermediate-frequency pseudolite signal to the baseband signal processing module.
The baseband signal processing module comprises a capturing and tracking module, a clock deviation calculation module and a clock correction parameter generation module; the acquisition tracking module settles navigation messages according to the digital intermediate frequency pseudo satellite signals and outputs the navigation messages to the clock deviation calculation module; the clock deviation calculation module calculates clock deviation data of the clock deviation calculation module and other m base stations in the same pseudo-satellite group network according to the input navigation message and outputs the clock deviation data to the clock correction parameter generation module; the clock correction parameter generation module calculates the clock correction parameter of the base station according to the input clock deviation data of the m base stations and the preselected clock reference and outputs the clock correction parameter to the baseband signal generation module.
The baseband signal generation module comprises a navigation message generation module, a spread spectrum modulation module and an intermediate frequency carrier generation module; the navigation message generation module generates n paths of pseudo satellite navigation messages according to the clock correction parameters and outputs the n paths of pseudo satellite navigation messages to the spread spectrum modulation module; the spread spectrum modulation module adjusts the pseudo code phase according to the clock correction parameter, and respectively carries out spread spectrum modulation with the n paths of pseudo satellite navigation messages and outputs the pseudo code phase and the n paths of pseudo satellite navigation messages to the intermediate frequency carrier generation module; and the intermediate frequency carrier generation module adjusts the phase of the original carrier according to the clock correction parameters, and modulates n paths of spread spectrum signals to n paths of intermediate frequency carriers respectively and outputs the n paths of spread spectrum signals to the n-channel pseudolite transmitting module.
The n-channel pseudo satellite transmitting module comprises a radio frequency front end chip and n groups of pseudo satellite transmitting antennas; the radio frequency front-end chip carries out up-conversion and digital-to-analog conversion according to the n paths of intermediate frequency carriers, and outputs n paths of high-frequency analog pseudo satellite signals to n groups of pseudo satellite transmitting antennas respectively; the n groups of pseudo satellite transmitting antennas broadcast the high-frequency analog pseudo satellite signals after receiving the signals, and the transmission of the base station signals is realized.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to further illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is also intended to be covered by the appended claims. The scope of the invention is defined by the claims and their equivalents.
Claims (5)
1. A MIMO pseudo satellite system base station device is characterized in that the device comprises an m-channel pseudo satellite receiving module, a baseband signal processing module, a baseband signal generating module and an n-channel pseudo satellite transmitting module;
the m-channel pseudo satellite receiving module receives signals of other m pseudo satellite base stations in the same pseudo satellite network, generates m paths of digital intermediate frequency pseudo satellite signals and outputs the m paths of digital intermediate frequency pseudo satellite signals to the baseband signal processing module;
the baseband signal processing module is used for resolving navigation messages, calculating clock deviation and generating clock correction parameters according to m paths of digital intermediate frequency pseudo satellite signals output by the m-channel pseudo satellite receiving module and outputting the parameters to the baseband signal generating module;
the baseband signal generating module adjusts clock information, signal phase and time delay of the generated signal according to the clock correction parameter output by the baseband signal processing module to generate n paths of digital intermediate frequency pseudo satellite signals and outputs the n paths of digital intermediate frequency pseudo satellite signals to the n-channel pseudo satellite transmitting module;
the n-channel pseudo satellite transmitting module generates n paths of analog high-frequency pseudo satellite signals according to the n paths of digital intermediate-frequency pseudo satellite signals generated by the baseband signal generating module and broadcasts the signals.
2. The MIMO pseudolite system base station apparatus of claim 1, wherein the m-channel pseudolite reception module comprises m sets of pseudolite reception antennas and a radio frequency front end chip; the m groups of pseudo satellite receiving antennas receive signals of other m pseudo satellite base stations in the same pseudo satellite network through different positions, and output the received pseudo satellite signals to a radio frequency front end chip; after receiving the high-frequency pseudolite analog signal, the radio frequency front end performs down-conversion and analog-to-digital conversion to generate a digital intermediate-frequency pseudolite signal and outputs the digital intermediate-frequency pseudolite signal to the baseband signal processing module.
3. The MIMO pseudolite system base station apparatus of claim 1, wherein the baseband signal processing module comprises an acquisition tracking module, a clock bias calculation module, and a clock correction parameter generation module; the acquisition tracking module settles navigation messages according to the digital intermediate frequency pseudo satellite signals and outputs the navigation messages to the clock deviation calculation module; the clock deviation calculation module calculates clock deviation data of the clock deviation calculation module and other m base stations in the same pseudo-satellite group network according to the input navigation message and outputs the clock deviation data to the clock correction parameter generation module; the clock correction parameter generation module calculates the clock correction parameter of the base station according to the input clock deviation data of the m base stations and the preselected clock reference and outputs the clock correction parameter to the baseband signal generation module.
4. The MIMO pseudolite system base station apparatus of claim 1, wherein the baseband signal generation module comprises a navigation message generation module, a spread spectrum modulation module, and an intermediate frequency carrier generation module; the navigation message generation module generates n paths of pseudo satellite navigation messages according to the clock correction parameters and outputs the n paths of pseudo satellite navigation messages to the spread spectrum modulation module; the spread spectrum modulation module adjusts the pseudo code phase according to the clock correction parameter, and respectively carries out spread spectrum modulation with the n paths of pseudo satellite navigation messages and outputs the pseudo code phase and the n paths of pseudo satellite navigation messages to the intermediate frequency carrier generation module; and the intermediate frequency carrier generation module adjusts the phase of the original carrier according to the clock correction parameters, and modulates n paths of spread spectrum signals to n paths of intermediate frequency carriers respectively and outputs the n paths of spread spectrum signals to the n-channel pseudolite transmitting module.
5. The MIMO pseudolite system base station apparatus of claim 1, wherein the n-channel pseudolite transmit module comprises a radio frequency front end chip and n sets of pseudolite transmit antennas; the radio frequency front-end chip carries out up-conversion and digital-to-analog conversion according to the n paths of intermediate frequency carriers, and outputs n paths of high-frequency analog pseudo satellite signals to n groups of pseudo satellite transmitting antennas respectively; the n groups of pseudo satellite transmitting antennas broadcast the high-frequency analog pseudo satellite signals after receiving the signals, and the transmission of the base station signals is realized.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114814919A (en) * | 2022-06-21 | 2022-07-29 | 东南大学 | Fusion positioning system and positioning method based on pseudolite and UWB |
| CN114845238A (en) * | 2022-04-20 | 2022-08-02 | 国网四川省电力公司达州供电公司 | Auxiliary positioning device for controlling drilling position of rotary drilling rig |
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| CN105044742A (en) * | 2015-08-27 | 2015-11-11 | 交通信息通信技术研究发展中心 | Baseband processing unit capable of simultaneously receiving pseudo satellite and satellite signal and method thereof |
| CN112363182A (en) * | 2020-11-06 | 2021-02-12 | 江苏集萃未来城市应用技术研究所有限公司 | Multi-beam pseudo satellite signal generation method and transmitting device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105044742A (en) * | 2015-08-27 | 2015-11-11 | 交通信息通信技术研究发展中心 | Baseband processing unit capable of simultaneously receiving pseudo satellite and satellite signal and method thereof |
| CN112363182A (en) * | 2020-11-06 | 2021-02-12 | 江苏集萃未来城市应用技术研究所有限公司 | Multi-beam pseudo satellite signal generation method and transmitting device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114845238A (en) * | 2022-04-20 | 2022-08-02 | 国网四川省电力公司达州供电公司 | Auxiliary positioning device for controlling drilling position of rotary drilling rig |
| CN114845238B (en) * | 2022-04-20 | 2024-01-30 | 国网四川省电力公司达州供电公司 | Auxiliary positioning device for controlling drilling position of rotary drilling rig |
| CN114814919A (en) * | 2022-06-21 | 2022-07-29 | 东南大学 | Fusion positioning system and positioning method based on pseudolite and UWB |
| CN114814919B (en) * | 2022-06-21 | 2022-11-18 | 东南大学 | Fusion positioning method based on pseudo satellite and UWB |
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