CN-115932914-B - Satellite positioning system, positioning method, receiver and wireless communication device

CN115932914BCN 115932914 BCN115932914 BCN 115932914BCN-115932914-B

Abstract

A satellite positioning system, positioning method, receiver and wireless communication device. The satellite positioning system comprises a receiver, a first passage connected with the receiver, a first antenna connected with the first passage, a second passage connected with the receiver and a second antenna connected with the second passage, wherein the first passage comprises a first sub-passage used for receiving a first frequency band GPS signal and a second sub-passage used for receiving a second frequency band GPS signal, the second passage comprises a third sub-passage used for receiving the first frequency band GPS signal and a fourth sub-passage used for receiving the second frequency band GPS signal, the first sub-passage and the third sub-passage are used for receiving the first frequency band GPS signal to capture satellites, and the second sub-passage and the fourth sub-passage are used for receiving the second frequency band GPS signal to perform positioning. Through the multipath design, the performance of the positioning system can be improved, and meanwhile, the interference caused by external environment change can be dealt with.

Inventors

YANG HUAI

Assignees

OPPO广东移动通信有限公司

Dates

Publication Date: 20260512
Application Date: 20221010

Claims (6)

1. A satellite positioning system comprising a receiver, a first path connected to the receiver, a first antenna connected to the first path, and a second path connected to the receiver, a second antenna connected to the second path, wherein: the first path comprises a first sub-path for receiving the first frequency band GPS signals and a second sub-path for receiving the second frequency band GPS signals; The second path comprises a third sub path for receiving the first frequency band GPS signals and a fourth sub path for receiving the second frequency band GPS signals; The first sub-path and the third sub-path are used for receiving the first frequency band GPS signals to acquire satellites, and the second sub-path and the fourth sub-path are used for receiving the second frequency band GPS signals to locate; The receiver is configured to select, based on a current operation mode of the positioning system, the first sub-path and/or the third sub-path to receive the first frequency band GPS signal for satellite acquisition, and select the second sub-path and/or the fourth sub-path to receive the second frequency band GPS signal for positioning, where the operation mode includes any one of the following: the first working mode is that a single-channel L1 frequency band and a single-channel L5 frequency band work; The second working mode is single-path L1 frequency band double-path L5 frequency band working or double-path L1 frequency band single-path L5 frequency band working, wherein for the single-path, the sub-path with the best signal quality is selected for receiving the L1 frequency band signal, and the sub-path with the best signal quality is selected for receiving the L5 frequency band signal; The third working mode is double-path L1 frequency band working or double-path L5 frequency band working; A fourth operation mode, namely the dual-channel L1 frequency band simultaneously works and the dual-channel L5 frequency band simultaneously works; the working mode can be switched, and after receiving the L1 frequency band signal to capture the satellite, the working mode can be converted into other working modes to realize signal enhancement so as to be convenient for positioning; In the first path, the first sub-path comprises a first filter, a first low noise amplifier and a first double-pass filter, the second sub-path comprises a second filter, a second low noise amplifier and the first double-pass filter, wherein the first filter and the first low noise amplifier are connected in series between a first receiving port of the receiver and a first output port of the first double-pass filter, the second filter and the second low noise amplifier are connected in series between a second receiving port of the receiver and a second output port of the first double-pass filter, an input port of the first double-pass filter is connected with the first antenna, or The first path comprises a third dual-pass filter, a first switching element, a fifth low noise amplifier and a fourth dual-pass filter, wherein the third dual-pass filter is connected with the first antenna, and two output ports of the fourth dual-pass filter are respectively connected with a first receiving port and a second receiving port of the receiver, wherein: The first sub-path includes a path from the first antenna to the first input port of the first switching element via the third dual-pass filter, from the first output port of the third dual-pass filter to the fourth dual-pass filter via the fifth low noise amplifier, and from the first output port of the fourth dual-pass filter to the first receiving port of the receiver; the second sub-path includes a path from the first antenna to the first switching element second input port via the third dual-pass filter, from the third dual-pass filter second output port to the first switching element second input port, from the first switching element output port to the fourth dual-pass filter via the fifth low noise amplifier, and from the fourth dual-pass filter second output port to the receiver second receiving port.
2. The satellite positioning system of claim 1, wherein in the second path the third sub-path comprises a third filter, a third low noise amplifier, and a second two-pass filter, the fourth sub-path comprises a fourth filter, a fourth low noise amplifier, and a second two-pass filter, wherein: The third filter and the third low noise amplifier are connected in series between a third receiving port of the receiver and a first output port of the second two-pass filter, the fourth filter and the fourth low noise amplifier are connected in series between a fourth receiving port of the receiver and a second output port of the second two-pass filter, and an input port of the second two-pass filter is connected with the second antenna.
3. The satellite positioning system of claim 1, wherein the second path comprises a fifth dual-pass filter, a second switching element, a sixth low noise amplifier, and a sixth dual-pass filter, wherein the fifth dual-pass filter is coupled to the second antenna, and wherein two output ports of the sixth dual-pass filter are coupled to a third receive port and a fourth receive port of the receiver, respectively, wherein: the third sub-path includes a path from the second antenna to the second switching element first input port via the fifth dual-pass filter, from the fifth dual-pass filter first output port, from the second switching element output port to the sixth dual-pass filter via the sixth low noise amplifier, from the sixth dual-pass filter first output port to a third receiving port of the receiver; The fourth sub-path includes a path from the second antenna to the second input port of the second switching element via the fifth dual-pass filter, from the second output port of the fifth dual-pass filter to the sixth dual-pass filter via the sixth low noise amplifier, and from the second output port of the sixth dual-pass filter to the fourth receiving port of the receiver.
4. A satellite positioning method for a satellite positioning system according to any one of claims 1-3, the satellite positioning system comprising a first path and a second path, wherein the first path comprises a first sub-path for receiving first frequency band GPS signals and a second sub-path for receiving second frequency band GPS signals, the second path comprises a third sub-path for receiving first frequency band GPS signals and a fourth sub-path for receiving second frequency band GPS signals, the method comprising: Based on the working mode of the current positioning system, selecting the first sub-path and/or the third sub-path to receive the first frequency band GPS signal for capturing satellites, and selecting the second sub-path and/or the fourth sub-path to receive the second frequency band GPS signal for positioning; Wherein, the working mode includes any one of the following: the first working mode is that a single-channel L1 frequency band and a single-channel L5 frequency band work; The second working mode is single-path L1 frequency band double-path L5 frequency band working or double-path L1 frequency band single-path L5 frequency band working, wherein for the single-path, the sub-path with the best signal quality is selected for receiving the L1 frequency band signal, and the sub-path with the best signal quality is selected for receiving the L5 frequency band signal; The third working mode is double-path L1 frequency band working or double-path L5 frequency band working; A fourth operation mode, namely the dual-channel L1 frequency band simultaneously works and the dual-channel L5 frequency band simultaneously works; The working mode is switchable based on performance dimension and user requirement, and comprises the steps of after receiving an L1 frequency band signal to capture a satellite, converting the working mode into other working modes, and realizing signal enhancement so as to position; when the working mode of the current positioning system is a first working mode, selecting a sub-path with the best current first frequency band signal quality from the first path and the second path to receive the first frequency band GPS signal, and adopting a sub-path for receiving a second frequency band GPS signal in the other path to receive the second frequency band GPS signal; When the working mode of the current positioning system is a second working mode, selecting a sub-path with the best current first frequency band signal quality from the first path and the second path to receive the first frequency band GPS signal, opening all sub-paths in the first path and the second path for receiving the second frequency band GPS signal to receive the second frequency band GPS signal, or opening all sub-paths in the first path and the second path for receiving the first frequency band GPS signal to receive the first frequency band GPS signal when the working mode of the current positioning system is a second working mode, and selecting a sub-path with the best current second frequency band signal quality from the first path and the second path to receive the second frequency band GPS signal; When the working mode of the current positioning system is a third working mode, all sub-paths for receiving the first frequency band GPS signals in the first path and the second path are opened to receive the first frequency band GPS signals, or all sub-paths for receiving the second frequency band GPS signals in the first path and the second path are opened to receive the second frequency band GPS signals; when the working mode of the current positioning system is a fourth working mode, the first sub-path and the third sub-path are opened to receive the first frequency band GPS signals, and the second sub-path and the fourth sub-path are opened to receive the second frequency band GPS signals.
5. A receiver comprising a processor and a memory storing a computer program executable on the processor, wherein the processor performs the steps of the satellite positioning method of claim 4 when the program is executed.
6. A wireless communication device comprising a satellite positioning system according to any of claims 1-3.

Description

Satellite positioning system, positioning method, receiver and wireless communication device Technical Field Embodiments of the present disclosure relate to the field of satellite navigation, and more particularly, but not exclusively, to a satellite positioning system, a positioning method, a receiver, and a wireless communication device. Background GNSS (Global Navigation SATELLITE SYSTEM ) positioning is based on the pseudorange, ephemeris, satellite time of transmission etc. observations of a set of satellites, while the user clock difference must be known. GNSS is an air-based radio navigation positioning system that can provide all-weather three-dimensional coordinates and velocity and time information to a user at any location on the earth's surface or near-earth space. If one wants to know longitude and latitude and also wants to know altitude, 4 satellites must be received to accurately locate. The global positioning systems are mainly used in the United states such as GPS, china BDS, russian GLONASS and European GALILEO, the regional systems such as Japanese QZSS and Indian IRNSS, and the enhancement systems such as American WAAS, japanese MSAS, european EGNOS, indian GAGAN and Nihonia NIG-GOMSAT-1. The general four-large positioning system mainly has three working frequency bands, such as L1:1575.42+/-1.023MHz, L2:1227.6+/-1.023MHz and L5:1176.45+/-1.023MHz by GPS, wherein L2 is mainly used by the military, L1 and L5 are civil frequency bands, and other positioning systems have working frequency bands which are similar or similar to each other, have a certain small interval for protection, and are wholly operated in the L band. However, the current positioning system cannot exert positioning capability in a weak signal environment. Disclosure of Invention The embodiment of the disclosure provides a satellite positioning system, a positioning method, a receiver and wireless communication equipment, which can improve positioning performance. In one aspect, an embodiment of the present disclosure provides a satellite positioning system, including a receiver, a first path connected to the receiver, a first antenna connected to the first path, and a second path connected to the receiver, a second antenna connected to the second path, wherein: The first path comprises a first sub-path for receiving the first frequency band GPS signals and a second sub-path for receiving the second frequency band GPS signals; The second path comprises a third sub path for receiving the first frequency band GPS signals and a fourth sub path for receiving the second frequency band GPS signals; the first sub-path and the third sub-path are used for receiving the first frequency band GPS signals to capture satellites, and the second sub-path and the fourth sub-path are used for receiving the second frequency band GPS signals to perform positioning. In another aspect, an embodiment of the present disclosure further provides a satellite positioning method, for the foregoing satellite positioning system, where the method includes: and selecting a first sub-path and/or a third sub-path to receive the GPS signals of the first frequency band for capturing satellites, and selecting a second sub-path and/or a fourth sub-path to receive the GPS signals of the second frequency band for positioning based on the working mode of the current positioning system. In yet another aspect, an embodiment of the present disclosure further provides a receiver including a processor and a memory storing a computer program executable on the processor, the processor implementing the steps in the satellite positioning method described above when the program is executed. In yet another aspect, an embodiment of the present disclosure further provides a wireless communication device including the foregoing satellite positioning system. According to the scheme provided by the embodiment of the disclosure, by setting the two sub-paths for receiving the first-frequency-band GPS signals, one or two sub-paths can be selected to receive the first-frequency-band GPS signals so as to acquire satellites. Meanwhile, by arranging two sub-channels for receiving the second-frequency-band GPS signals, one or two sub-channels can be selectively opened to receive the second-frequency-band GPS signals for positioning, and through the multipath design, the performance of the positioning system can be improved, and meanwhile, the interference caused by external environment change can be coped with. Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure. Other advantages of the present disclosure may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. Drawings The accompanying drawings are included to provide an understanding of the tec