Satellite positioning system, positioning method, receiver and wireless communication device

Abstract

A satellite positioning system, a positioning method, a receiver and a wireless communication device. The satellite positioning system comprises a receiver, a first channel connected to the receiver, a first antenna connected to the first channel, a second channel connected to the receiver, and a second antenna connected to the second channel. The first channel comprises a first sub-channel for receiving a first band GPS signal and a second sub-channel for receiving a second band GPS signal. The second channel comprises a third sub-channel for receiving the first band GPS signal and a fourth sub-channel for receiving the second band GPS signal. The first sub-channel and the third sub-channel are used to receive the first band GPS signal to acquire a satellite, and the second sub-channel and the fourth sub-channel are used to receive the second band GPS signal to perform positioning. Through the multi-channel design, the performance of the positioning system can be improved, and the interference caused by the change of the external environment can be coped with.

Description

Technical Field

[0001] This disclosure relates to, but is not limited to, the field of satellite navigation, and particularly to a satellite positioning system, positioning method, receiver, and wireless communication device. Background Technology

[0002] GNSS (Global Navigation Satellite System) positioning utilizes observations such as pseudorange, ephemeris, and satellite transmission times from a group of satellites, while also requiring knowledge of the user's clock bias. GNSS is a space-based radio navigation and positioning system that provides users with all-weather, three-dimensional coordinates, velocity, and time information at any location on the Earth's surface or in near-Earth space. To determine latitude, longitude, and altitude, accurate positioning requires reception from at least four satellites. Currently, globally used positioning systems include the US GPS, China's BDS, Russia's GLONASS, and Europe's GALILEO. Regional systems include Japan's QZSS and India's IRNSS. Augmentation systems include the US WAAS, Japan's MSAS, the EU's EGNOS, India's GAGAN, and Nigeria's NIG-GOMSAT-1, among others.

[0003] The four major common positioning systems operate in three frequency bands. Taking GPS as an example, the bands are: L1: 1575.42 + / - 1.023 MHz, L2: 1227.6 + / - 1.023 MHz, and L5: 1176.45 + / - 1.023 MHz. L2 is primarily used by the military, while L1 and L5 are for civilian use. Other positioning systems operate in similar or close frequency bands, with small intervals between them for protection, but all generally operate in the L-band. However, current positioning systems cannot function effectively in weak signal environments. Summary of the Invention

[0004] This disclosure provides a satellite positioning system, positioning method, receiver, and wireless communication device that can improve positioning performance.

[0005] On one hand, this 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, and a second antenna connected to the second path, wherein:

[0006] The first path includes a first sub-path for receiving GPS signals in a first frequency band and a second sub-path for receiving GPS signals in a second frequency band;

[0007] The second path includes a third sub-path for receiving GPS signals in the first frequency band and a fourth sub-path for receiving GPS signals in the second frequency band.

[0008] The first sub-path and the third sub-path are used to receive GPS signals in the first frequency band to capture satellites, and the second sub-path and the fourth sub-path are used to receive GPS signals in the second frequency band for positioning.

[0009] On the other hand, this disclosure also provides a satellite positioning method for the aforementioned satellite positioning system, the method comprising:

[0010] Based on the current operating mode of the positioning system, the first sub-path and / or the third sub-path are selected to receive the first frequency band GPS signal for satellite acquisition, and the second sub-path and / or the fourth sub-path are selected to receive the second frequency band GPS signal for positioning.

[0011] In another aspect, embodiments of this disclosure also provide a receiver, including a processor and a memory storing a computer program that can run on the processor, wherein the processor executes the program to implement the steps in the above-described satellite positioning method.

[0012] Furthermore, embodiments of this disclosure also provide a wireless communication device that includes the aforementioned satellite positioning system.

[0013] The solution provided in this disclosure, by setting up two sub-paths for receiving GPS signals in the first frequency band, allows selection of one or both sub-paths to receive GPS signals in the first frequency band to acquire satellites. Simultaneously, by setting up two sub-paths for receiving GPS signals in the second frequency band, one or both sub-paths can be selected to receive GPS signals in the second frequency band for positioning. This multi-path design improves the performance of the positioning system and helps to cope with interference caused by changes in the external environment.

[0014] Other features and advantages of this disclosure will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the disclosure. Other advantages of this disclosure may be realized and obtained by means of the embodiments described in the description, claims, and drawings. Attached Figure Description

[0015] The accompanying drawings are provided to illustrate the technical solutions of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure. The shapes and sizes of the components in the drawings do not reflect actual proportions and are only intended to illustrate the content of this disclosure.

[0016] Figure 1This is a system architecture diagram for a general GPS design scheme;

[0017] Figure 2 A schematic diagram of the positioning system framework provided in the embodiments of this disclosure;

[0018] Figure 3 This is a schematic diagram of a satellite positioning system structure provided in an embodiment of the present disclosure;

[0019] Figures 4a-4b for Figure 3 The diagram shows the hardware pathways for the two first operating modes of the system.

[0020] Figures 5a-5d for Figure 3 The diagram shows the hardware pathways for the two second operating modes of the system.

[0021] Figures 6a-6b for Figure 3 The diagram shows the hardware pathways for the two third operating modes of the system.

[0022] Figure 7 for Figure 3 The diagram shows the hardware path for the fourth operating mode of the system.

[0023] Figure 8 This is a schematic diagram of another satellite positioning system structure provided in an embodiment of the present disclosure;

[0024] Figures 9a-9b for Figure 8 The diagram shows the hardware pathways for the two first operating modes of the system.

[0025] Figures 10a-10b for Figure 8 The diagram shows the hardware pathways for the two third operating modes of the system.

[0026] Figure 11 A flowchart of the positioning method provided in the embodiments of this disclosure;

[0027] Figure 12 A schematic diagram of a receiver provided in an embodiment of this disclosure. Detailed Implementation

[0028] This disclosure describes several embodiments, but these descriptions are exemplary and not limiting, and it will be apparent to those skilled in the art that many more embodiments and implementations are possible within the scope of the embodiments described herein. Although many possible combinations of features are shown in the drawings and discussed in the detailed description, many other combinations of the disclosed features are also possible. Unless specifically limited, any feature or element of any embodiment may be used in combination with or in lieu of any other feature or element in any other embodiment.

[0029] This disclosure includes and contemplates combinations of features and elements known to those skilled in the art. The embodiments, features, and elements disclosed in this disclosure may also be combined with any conventional features or elements to form a unique inventive scheme as defined by the claims. Any feature or element of any embodiment may also be combined with features or elements from other inventive schemes to form another unique inventive scheme as defined by the claims. Therefore, it should be understood that any feature shown and / or discussed in this disclosure may be implemented individually or in any suitable combination. Therefore, the embodiments are not limited except by the limitations imposed by the appended claims and their equivalents. Furthermore, various modifications and changes may be made within the scope of the appended claims.

[0030] Furthermore, in describing representative embodiments, the specification may have presented methods and / or processes as a specific sequence of steps. However, the method or process should not be limited to the specific order of steps described herein, to the extent that the method or process does not depend on the specific order of steps described herein. As will be understood by those skilled in the art, other sequences of steps are also possible. Therefore, the specific order of steps set forth in the specification should not be construed as a limitation of the claims. Moreover, the claims relating to the method and / or process should not be limited to the steps performed in the order written, and those skilled in the art will readily understand that these orders can be varied and still remain within the spirit and scope of the embodiments disclosed herein.

[0031] Figure 1 This is a general GPS design scheme, including two communication paths: L1 and L5. In the diagram, SAW is a surface acoustic wave filter, and LNA is a low-noise amplifier. For each path, the antenna receives the signal, which passes through the SAW, LNA, and finally into the receiver for positioning. Figure 1The system shown is a complete compatible system that can meet the design requirements of systems such as BeiDou, GLONASS, and GALILEO.

[0032] like Figure 1 The positioning system shown uses the L1 band for active acquisition. During the initial startup, the system acquires satellites via the L1 channel. After acquisition, it enhances the signal using the L5 channel, for example, by improving accuracy in complex conditions (such as overpasses or running tracks on a playground). As a system that only needs to receive signals, this positioning system currently lacks the ability to locate under weak signal conditions. This is because the system only receives one transmitted signal. In scenarios such as parking garages (no signal), areas shaded by trees (signal quality deteriorates due to obstruction), and tall buildings (multipath propagation affects accuracy), the signal is too poor for the system to acquire or track satellite signals, making positioning difficult.

[0033] To maximize GPS reception performance, this disclosure provides a 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, and a second antenna connected to the second path, wherein:

[0034] The first path includes a first sub-path for receiving GPS signals in a first frequency band and a second sub-path for receiving GPS signals in a second frequency band;

[0035] The second path includes a third sub-path for receiving GPS signals in the first frequency band and a fourth sub-path for receiving GPS signals in the second frequency band.

[0036] The first and third sub-paths are used to receive GPS signals in the first frequency band to acquire satellites, and the second and fourth sub-paths are used to receive GPS signals in the second frequency band for positioning.

[0037] By setting up two sub-paths for receiving GPS signals in the first frequency band, the sub-path with the best signal quality can be selected to receive the first frequency band GPS signal to acquire satellites. Simultaneously, by setting up two sub-paths for receiving GPS signals in the second frequency band, one or both sub-paths can be selected to receive the second frequency band GPS signal for positioning. This multi-path design improves the performance of the positioning system and helps it cope with interference caused by changes in the external environment.

[0038] In an exemplary embodiment, in the first path, the first sub-path includes a first filter, a first low-noise amplifier, and a first two-pass filter; the second sub-path includes a second filter, a second low-noise amplifier, and the first two-pass filter; wherein: the first filter and the first low-noise amplifier are connected in series between the first receiving port of the receiver and the first output port of the first two-pass filter, the second filter and the second low-noise amplifier are connected in series between the second receiving port of the receiver and the second output port of the first two-pass filter, and the input port of the first two-pass filter is connected to the first antenna. The first two-pass filter includes an input port configured to be connected to the first antenna and two output ports respectively connected to the low-noise amplifier. Using a two-pass filter saves one filter component.

[0039] In an exemplary embodiment, the second path can adopt the same configuration as the first path. Specifically, the third sub-path includes a third filter, a third low-noise amplifier, and a second dual-pass filter; the fourth sub-path includes a fourth filter, a fourth low-noise amplifier, and a second dual-pass filter; wherein: the third filter and the third low-noise amplifier are connected in series between the third receiving port of the receiver and the first output port of the second dual-pass filter, the fourth filter and the fourth low-noise amplifier are connected in series between the fourth receiving port of the receiver and the second output port of the second dual-pass filter, and the input port of the second dual-pass filter is connected to the second antenna. The second dual-pass filter includes an input port configured to be connected to the second antenna and two output ports respectively connected to the low-noise amplifier. Similarly, using a dual-pass filter in the second path can save a filter component. In other embodiments, the configuration of the second path can be different from that of the first path.

[0040] Figure 3 This is a schematic diagram of a positioning system provided in an embodiment of the present disclosure. The positioning system includes a first channel and a second channel, each channel being a dual-band antenna capable of simultaneously supporting L1 and L5 frequency bands, i.e., each channel includes an L1 sub-channel and an L5 sub-channel. Figure 3 As shown, Dual-SAW1 is a dual-pass filter (hereinafter referred to as dual-pass filter) that can simultaneously support the L1 and L5 frequency bands. LNA1 and SAW1 support the L1 frequency band, and LNA2 and SAW2 support the L5 frequency band. Similarly, for the second path, Dual-SAW2 is the same as Dual-SAW1, a dual-pass filter that can simultaneously support the L1 and L5 frequency bands. LNA3 and SAW3 support the L1 frequency band, and LNA4 and SAW4 support the L5 frequency band.

[0041] for Figure 3 The system architecture shown can have the following four operating modes, where the first operating mode is also called the economic mode, the second and third operating modes are also called the normal mode, and the fourth operating mode is also called the extreme mode:

[0042] First operating mode: Single-channel L1 band and single-channel L5 band operation;

[0043] Second working mode: Dual-path L1 band and L5 band work separately, including single-path L1 dual-path L5 mode and dual-path L1 single-path L5 mode.

[0044] The third working mode: dual-path L1 band operation or dual-path L5 band operation, including dual-path L1 mode and dual-path L5 mode;

[0045] Fourth working mode: simultaneous operation of dual-channel L1 band and simultaneous operation of dual-channel L5 band.

[0046] Figure 4a and Figure 4b Two hardware path diagrams for the first operating mode are given. In this mode, the L1 and L5 bands operate completely independently, but the two paths can be selected based on their performance differences, choosing the path with the best signal quality (e.g., the path with the strongest signal). This mode primarily shuts down the other path under certain strong signal conditions to ensure power consumption (both the Dual-SAW and SAW components in the path are passive devices and do not increase power). Figure 4a As shown, the L1 sub-path of the first path is active, i.e., SAW1, LNA1, and Dual-SAW1 are active, enabling the reception of L1 band signals; SAW2 and LNA2 are inactive. The L5 sub-path of the second path is active, i.e., SAW3, LNA3, and Dual-SAW2 are active, enabling the reception of L5 band signals; SAW4 and LNA4 are inactive. (The rest of the text is incomplete and cannot be translated.) Figure 4b As shown, the L5 sub-path of the first path is active, namely SAW2, LNA2, and Dual-SAW1, enabling the reception of L5 band signals; SAW1 and LNA1 are inactive. The L1 sub-path of the second path is active, namely SAW4, LNA4, and Dual-SAW2, enabling the reception of L1 band signals; SAW3 and LNA3 are inactive.

[0047] Both filters and dual-pass filters are passive devices, and the opening and closing of each sub-path can be achieved by controlling the active device LNA through the receiver.

[0048] Figures 5a-5dFour hardware path diagrams for the second operating mode are provided. In this mode, it can support single-path L1 band dual-path L5 band (referred to as single L1 dual L5) mode and dual-path L1 band single-path L5 band (referred to as dual L1 single L5) mode. In this second operating mode, performance and power consumption can be balanced.

[0049] Figure 5a and Figure 5b This diagram illustrates the hardware path for two single L1 dual L5 modes. In this mode, both the L5 sub-paths in the first and second paths are activated, and the L1 frequency band can be selected to choose the L1 path with the best signal. Figure 5a As shown, in this example, the L1 sub-path signal of the first path is relatively good. Therefore, both the L1 and L5 sub-paths of the first path are operational, enabling reception of L1 and L5 band signals. The L5 sub-path of the second path is operational, meaning SAW3, LNA3, and Dual-SAW2 are working, enabling reception of L5 band signals. SAW4 and LNA4 are not operational. In this example, the L5 signal received by the receiver is the superposition of the L5 signals from both sub-paths. Figure 5b As shown, in this example, the L1 sub-path signal of the second path is better, so the L1 sub-path of the second path is working, and the L5 sub-path of the first path is working, that is, SAW2, LNA2 and Dual-SAW1 are working, realizing the reception of L5 band signals. SAW1 and LNA1 are not working. Both the L1 sub-path and L5 sub-path of the second path are working, realizing the reception of L1 band and L5 band signals. Similarly, in this example, the L5 signal received by the receiver is the superposition of the L5 signals of the two sub-paths.

[0050] The principle behind improving the downlink quality of the entire positioning system by superimposing multiple received signals is as follows: The received signal R(t) of the positioning system can be obtained by superimposing multiple received signals:

[0051] R(t)=A1*R1(t)+A2*R2(t)+…Am*Rm(t)

[0052] Where Am is the weighting coefficient for each received signal, and Rm(t) is the signal power of each received signal. For the entire system, the signal power of multiple received signals will be enhanced, and since the noise of each signal is the same, the overall uplink and downlink reception can be enhanced.

[0053] Figure 5c and Figure 5dThis diagram illustrates the hardware path for two dual-L1 single-L5 modes. In this mode, both the L1 sub-paths in the first and second paths are activated, and the L1 signal received by the receiver is the superposition of the L1 signals from both sub-paths. Furthermore, this mode allows for L5 band selection to choose the optimal L5 path. Figure 5c As shown, in this example, the L5 signal quality of the second path is better. Therefore, the L1 sub-path of the first path is active, i.e., SAW1, LNA1, and Dual-SAW1 are active, while SAW2 and LNA2 are inactive. Both the L1 and L5 sub-paths of the second path are active. The reception of the L1 band signal is achieved by superimposing the signals from the two sub-paths, and the reception of the L5 band signal is achieved through the L5 sub-path of the second path. Figure 5d As shown, in this example, the L5 signal quality of the first path is better, so both the L1 and L5 sub-paths of the first path are working. The L1 sub-path of the second path is working, that is, SAW4, LNA4, and Dual-SAW2 are working, while SAW3 and LNA3 are not working. The L1 band signal is received by superimposing the signals of the two sub-paths, and the L5 band signal is received by using the L5 sub-path of the first path.

[0054] Figures 6a-6b Two hardware path diagrams for the third operating mode are given. In this mode, dual-path L1 band (referred to as dual L1) and dual-path L5 band (referred to as dual L5) modes are supported. Since dual-path mode is used for the same frequency band, the two signals can be superimposed to enhance the positioning system's reception performance. Weighted superposition can be used during signal superposition, and weighting coefficients can be set for each signal.

[0055] Figure 6a This is a schematic diagram of a dual L1 mode hardware path. In this mode, the L5 sub-paths of both the first and second paths are disabled, but the L1 sub-paths of both paths are simultaneously enabled to ensure optimal L1 performance. Figure 6a As shown, the L1 sub-paths of the first channel are operational, namely SAW1, LNA1, and Dual-SAW1, while SAW2 and LNA2 are inactive. The L1 sub-paths of the second channel are operational, namely SAW4, LNA4, and Dual-SAW2, while SAW3 and LNA3 are inactive. L1 band signal reception is achieved by superimposing the signals from the two sub-paths. After acquiring satellite signals in the L1 band, the operating mode can be switched to other modes, such as the following... Figure 6b The operating mode enhances the signal for positioning; in other embodiments, it can switch to other modes, such as... Figure 5a or Figure 5b The pattern shown is not limited in this disclosure.

[0056] Figure 6b This is a schematic diagram of a dual L5 mode hardware path. In this mode, the L1 sub-paths of both the first and second paths are disabled, but the L5 sub-paths of both paths are simultaneously enabled to ensure optimal L5 performance. Figure 6b As shown, the L5 sub-path of the first channel is active, namely SAW2, LNA2, and Dual-SAW1, while SAW1 and LNA1 are inactive. The L5 sub-path of the second channel is active, namely SAW3, LNA3, and Dual-SAW2, while SAW4 and LNA4 are inactive. L5 band signal reception is achieved by superimposing the signals from the two sub-paths.

[0057] Figure 7 A hardware path diagram for the fourth operating mode is provided. In this mode, both the L1 and L5 sub-paths of each path are enabled, satisfying all performance requirements, but power consumption will increase accordingly. For example... Figure 7 As shown, both sub-paths in each path are operational, enabling dual-path L1 reception and dual-path L5 reception, which can meet the requirements of downlink L1 and L5 two-way 2*2 MIMO (Multiple Input Multiple Output).

[0058] The above-mentioned multiple working modes can be switched between each other. The switching conditions can be determined based on performance dimensions and user requirements, and this disclosure does not impose any restrictions on this.

[0059] In existing solutions, the corresponding antennas use fixed modes; any human intervention or environmental changes will lead to performance deviations. Table 1 shows... Figure 3 The system shown is compared with the available system pathways of existing solutions, as can be clearly seen from Table 1. Figure 3 The system shown can provide more selectable pathways to achieve performance optimization.

[0060] Table 1

[0061]

[0062]

[0063] Note: Bold text in the table indicates additional working modes compared to existing solutions.

[0064] By adopting the solution of the present disclosure embodiment, the performance of the positioning system can be improved through multi-path design, and interference caused by changes in the external environment can be coped with.

[0065] In another exemplary embodiment, the first path includes a third dual-pass filter, a first switching element, a fifth low-noise amplifier, and a fourth dual-pass filter. The input port of the third dual-pass filter is connected to the first antenna. The third dual-pass filter includes two output ports, which are respectively connected to the two input ports of the first switching element. The output port of the first switching element is connected to the fifth low-noise amplifier. The output port of the fifth low-noise amplifier is connected to the input port of the fourth dual-pass filter. The two output ports of the fourth dual-pass filter are respectively connected to the first receiving port and the second receiving port of the receiver.

[0066] The first sub-path includes: a path from the first antenna through the third double-pass filter, from the first output port of the third double-pass filter to the first input port of the first switching element, from the output port of the first switching element through the fifth low-noise amplifier to the fourth double-pass filter, and from the first output port of the fourth double-pass filter to the first receiving port of the receiver; the second sub-path includes: a path from the first antenna through the third double-pass filter, from the second output port of the third double-pass filter to the second input port of the first switching element, from the output port of the first switching element through the fifth low-noise amplifier to the fourth double-pass filter, and from the second output port of the fourth double-pass filter to the second receiving port of the receiver.

[0067] In this example, the first and second sub-paths, in addition to multiplexing the third double-pass filter, also time-division multiplex the fifth low-noise amplifier via a first switching element, and multiplex the fourth double-pass filter. This first switching element can be a single-pole double-throw switch. Using a double-pass filter saves one filter and one low-noise amplifier.

[0068] In an exemplary embodiment, the second path can adopt the same configuration as the aforementioned first path. Specifically, the second path includes a fifth dual-pass filter, a second switching element, a sixth low-noise amplifier, and a sixth dual-pass filter. The input port of the fifth dual-pass filter is connected to the second antenna. The fifth dual-pass filter includes two output ports, which are respectively connected to the two input ports of the second switching element. The output port of the second switching element is connected to the sixth low-noise amplifier. The output port of the sixth low-noise amplifier is connected to the input port of the sixth dual-pass filter. The two output ports of the sixth dual-pass filter are respectively connected to the third and fourth receiving ports of the receiver.

[0069] The third sub-path includes: a path from the second antenna through the fifth double-pass filter, from the first output port of the fifth double-pass filter to the first input port of the second switching element, from the output port of the second switching element through the sixth low-noise amplifier to the sixth double-pass filter, and from the first output port of the sixth double-pass filter to the third receiving port of the receiver; the fourth sub-path includes: a path from the second antenna through the fifth double-pass filter, from the second output port of the fifth double-pass filter to the second input port of the second switching element, from the output port of the second switching element through the sixth low-noise amplifier to the sixth double-pass filter, and from the second output port of the sixth double-pass filter to the fourth receiving port of the receiver.

[0070] In addition to multiplexing the fifth double-pass filter, the third and fourth sub-paths also time-multiplex the sixth low-noise amplifier and the sixth double-pass filter via the first switching element. This second switching element can be a single-pole double-throw switch. Similarly, using a double-pass filter in the second path saves one filter and one low-noise amplifier.

[0071] In other embodiments, the configuration of the second path may differ from the configuration of the first path; for example, one of the paths may use... Figure 3 The configuration shown in the embodiment is used for one path, while the configuration described in this embodiment is used for another path.

[0072] The internal paths of a dual-pass filter include a path that can receive the L1 frequency band and a path that can receive the L5 frequency band. Taking the fourth dual-pass filter as an example, if the signal received from the fifth low-noise amplifier is in the L1 frequency band, it can be output through the first output port; if it is in the L5 frequency band, it can be output through the second output port.

[0073] Figure 8 A schematic diagram of another positioning system provided in this embodiment is given. This positioning system includes a first channel and a second channel, each channel supporting either L1 or L5 frequency bands, and each channel includes an L1 sub-channel and an L5 sub-channel. Specifically, for the first channel, Dual-SAW3 simultaneously supports L1 and L5, LNA5 time-division multiplexes L1 and L5, and Dual-SAW4 time-division multiplexes L1 and L5. Similarly, for the second channel, Dual-SAW5 simultaneously supports L1 and L5, LNA6 time-division multiplexes L1 and L5, and Dual-SAW6 time-division multiplexes L1 and L5. Since the LNA can support both L1 and L5, in this embodiment, the two sub-channels of one channel can time-division multiplex one LNA. Furthermore, since Dual-SAW is essentially equivalent to SAW, in this example, a switching element is added to achieve [the desired functionality]. Figure 3 The system shown has similar functionality.

[0074] according to Figure 8 As shown in the system, the two sub-paths within each path cannot be simultaneously activated; therefore, this embodiment does not have the aforementioned second and fourth operating modes. Specifically, there are the following two operating modes:

[0075] First operating mode: Single-channel L1 band and single-channel L5 band operation;

[0076] The third operating mode: Dual-channel L1 band or dual-channel L5 band operation.

[0077] Figure 9a and Figure 9b Two hardware path diagrams for the first operating mode are given. In this mode, the L1 and L5 frequency bands operate independently, but these two paths can be selected based on the performance differences between them, choosing the path with the best signal quality (e.g., the path with the strongest signal). This mode shuts down the other path to conserve power under certain strong signal conditions. Figure 9a As shown, the first channel L1 sub-channel is active, and SPDT1 opens the L1 sub-channel, as follows. Figure 9a The first path is shown by the thick solid line. The second path, L5 sub-path, is active; SPDT2 activates the L5 sub-path, as shown below. Figure 9a The thick solid line in the second path is shown. (See also...) Figure 9b As shown, the first channel L5 sub-channel is active, and SPDT1 opens the L5 sub-channel, as follows. Figure 9b The first path is shown by the thick solid line. The second path, sub-path L1, is active; SPDT2 activates sub-path L1, as shown... Figure 9b The second path is shown by the thick solid line.

[0078] Figure 10a and Figure 10b Two hardware path diagrams for the third operating mode are given. In this mode, dual L1 mode and dual L5 mode are supported. For example... Figure 10a As shown, the first channel L1 sub-channel is active, and SPDT1 opens the L1 sub-channel, as follows. Figure 10a The first path is shown by the thick solid line. The second path, sub-path L1, is active; SPDT2 activates sub-path L1, as shown below. Figure 10a As shown by the thick solid line in the second path, L1 band signals are received simultaneously through two paths to ensure optimal L1 performance. Figure 10b As shown, the first channel L5 sub-channel is active, and SPDT1 opens the L5 sub-channel, as follows. Figure 10b The first path is shown by the thick solid line. The second path, L5 sub-path, is active; SPDT2 activates the L5 sub-path, as shown below. Figure 10bAs shown by the thick solid line in the second path, L5 band signals are received simultaneously through both paths to ensure optimal L5 performance. This is achieved by... Figure 10a After acquiring satellites by receiving L1 band signals in the mode shown, the operating mode can be switched to other operating modes, for example... Figure 10b The operating mode is used to achieve positioning. In other embodiments, it can also be switched to other modes, such as... Figure 9a or Figure 9b The pattern shown is not limited in this disclosure.

[0079] The optimal hardware path design can be chosen based on cost considerations to achieve a balance between performance and cost. Table 2 shows... Figure 8 The available system pathways of the system shown are compared with those of existing solutions, as can be seen from Table 2. Figure 8 Although the system shown lacks extreme modes and combinations of dual L1 / L5 and single L1 / L5 in normal modes, its performance in the most basic and typical scenarios can be guaranteed.

[0080] Table 2

[0081]

[0082] Note: Bold text in the table indicates additional working modes compared to existing solutions.

[0083] By adopting this embodiment and through multi-path design, the performance of the positioning system can be improved, and interference caused by changes in the external environment can be dealt with at the same time.

[0084] This disclosure also provides a positioning method applicable to any of the aforementioned positioning systems, as shown in FIG11, the method includes:

[0085] Step 10: Based on the current operating mode of the positioning system, select the first sub-path and / or the third sub-path to receive the first frequency band GPS signal to acquire satellites;

[0086] Step 20: Based on the current operating mode of the positioning system, select the second sub-path and / or the fourth sub-path to receive the second frequency band GPS signal for positioning.

[0087] In an exemplary embodiment, when the current operating mode of the positioning system is the first operating mode (the aforementioned economic mode): the sub-path with the best current first frequency band signal quality (e.g., signal strength) is selected from the first path and the second path to receive the first frequency band GPS signal, and the sub-path of the other path used to receive the second frequency band GPS signal is used to receive the second frequency band GPS signal.

[0088] In an exemplary embodiment, when the current operating mode of the positioning system is the second operating mode, the sub-channel with the best signal quality in the first frequency band is selected from the first channel and the second channel to receive the GPS signal in the first frequency band, and all sub-channels in the first channel and the second channel used to receive the GPS signal in the second frequency band are opened to receive the GPS signal in the second frequency band.

[0089] In an exemplary embodiment, when the current operating mode of the positioning system is the second operating mode, all sub-channels in the first and second channels used for receiving the first frequency band GPS signal are opened to receive the first frequency band GPS signal, and the sub-channel with the best current second frequency band signal quality is selected from the first and second channels to receive the second frequency band GPS signal.

[0090] In an exemplary embodiment, when the current operating mode of the positioning system is the third operating mode, all sub-channels in the first and second channels used for receiving the first frequency band GPS signal are opened to receive the first frequency band GPS signal, or all sub-channels in the first and second channels used for receiving the second frequency band GPS signal are opened to receive the second frequency band GPS signal.

[0091] In an exemplary embodiment, when the current positioning system is operating in the fourth operating mode, the first sub-path and the third sub-path are opened to receive the first frequency band GPS signal for satellite acquisition, and the second sub-path and the fourth sub-path are opened to receive the second frequency band GPS signal for positioning.

[0092] The above positioning method can be implemented by a receiver.

[0093] This disclosure also provides a receiver. The receiver may include a processor and a memory storing a computer program that can run on the processor, wherein the processor executes the computer program to implement the aforementioned satellite positioning method.

[0094] like Figure 12 As shown, in one example, receiver 100 may include: processor 110, memory 120, bus system 130 and transceiver 140, wherein processor 110, memory 120 and transceiver 140 are connected via bus system 130, memory 120 is used to store instructions, and processor 110 is used to execute the instructions stored in memory 120 to control transceiver 140 to transmit signals.

[0095] It should be understood that processor 110 can be a central processing unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), off-the-shelf programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0096] Memory 120 may include read-only memory and random access memory, and provides instructions and data to processor 110. A portion of memory 120 may also include non-volatile random access memory. For example, memory 120 may also store device type information.

[0097] In addition to a data bus, the bus system 130 may also include a power bus, a control bus, and a status signal bus. However, for clarity, in... Figure 12 The general labeled all buses as Bus System 130.

[0098] In implementation, the processing performed by the receiver can be accomplished through integrated logic circuits in the hardware of the processor 110 or through software instructions. That is, the steps of the method disclosed in this embodiment can be executed by a hardware processor, or by a combination of hardware and software modules within the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other storage media. This storage medium is located in memory 120, and the processor 110 reads the information in memory 120 and, in conjunction with its hardware, completes the steps of the aforementioned positioning method. To avoid repetition, further details are omitted here.

[0099] This disclosure also provides a wireless communication device that includes the aforementioned satellite positioning system. The wireless communication device involved in this disclosure can include various handheld devices with positioning functions, in-vehicle devices, virtual reality / augmented reality devices, smart home devices, wearable devices, computing devices or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) (e.g., mobile phones), mobile stations (MS), terminal devices, etc.

[0100] In the description of the embodiments of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the meaning of the above terms in this disclosure according to the circumstances.

[0101] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

[0102] It will be understood by those skilled in the art that all or some of the steps, systems, or apparatuses disclosed above, and their functional modules / units, can be implemented as software, firmware, hardware, or suitable combinations thereof. In hardware implementations, the division between functional modules / units mentioned above does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed collaboratively by several physical components. Some or all components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit (ASIC). Such software may be distributed on a computer-readable medium, which may include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

Claims

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, and a second antenna connected to the second path, wherein: The first path includes a first sub-path for receiving GPS signals in a first frequency band and a second sub-path for receiving GPS signals in a second frequency band; The second path includes a third sub-path for receiving GPS signals in the first frequency band and a fourth sub-path for receiving GPS signals in the second frequency band. The first sub-path and the third sub-path are used to receive the first frequency band GPS signal to capture satellites, and the second sub-path and the fourth sub-path are used to receive the second frequency band GPS signal for positioning. The receiver is configured to, based on the current operating mode of the positioning system, select 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. The operating mode includes any one of the following: First operating mode: Single-channel L1 band and single-channel L5 band operation; The second working mode is either single-channel L1 band dual-channel L5 band operation or dual-channel L1 band single-channel L5 band operation. For single-channel operation, the sub-channel with the best signal quality is selected to receive L1 band signals, and the sub-channel with the best signal quality is selected to receive L5 band signals. Third working mode: Dual-path L1 band operation or dual-path L5 band operation; Fourth operating mode: simultaneous operation of dual-channel L1 band and simultaneous operation of dual-channel L5 band; The working mode is switchable, including: after receiving L1 band signals to acquire satellites, the working mode can be switched to other working modes to enhance the signal for positioning. In the first path: the first sub-path includes a first filter, a first low-noise amplifier, and a first dual-pass filter; the second sub-path includes a second filter, a second low-noise amplifier, and the first dual-pass filter; wherein: the first filter and the first low-noise amplifier are connected in series between the first receiving port of the receiver and the first output port of the first dual-pass filter, the second filter and the second low-noise amplifier are connected in series between the second receiving port of the receiver and the second output port of the first dual-pass filter, and the input port of the first dual-pass filter is connected to the first antenna; or The first path includes 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 to the first antenna, and the two output ports of the fourth dual-pass filter are respectively connected to the first receiving port and the second receiving port of the receiver. The first sub-path includes: a path from the first antenna through the third double-pass filter, from the first output port of the third double-pass filter to the first input port of the first switching element, from the output port of the first switching element through the fifth low-noise amplifier to the fourth double-pass filter, and from the first output port of the fourth double-pass filter to the first receiving port of the receiver; The second sub-path includes: a path from the first antenna through the third double-pass filter, from the second output port of the third double-pass filter to the second input port of the first switching element, from the output port of the first switching element through the fifth low-noise amplifier to the fourth double-pass filter, and from the second output port of the fourth double-pass filter to the second receiving port of the receiver.

2. The satellite positioning system according to claim 1, characterized in that, In the second path: the third sub-path includes a third filter, a third low-noise amplifier, and a second double-pass filter; the fourth sub-path includes a fourth filter, a fourth low-noise amplifier, and a second double-pass filter; wherein: The third filter and the third low-noise amplifier are connected in series between the third receiving port of the receiver and the first output port of the second dual-pass filter. The fourth filter and the fourth low-noise amplifier are connected in series between the fourth receiving port of the receiver and the second output port of the second dual-pass filter. The input port of the second dual-pass filter is connected to the second antenna.

3. The satellite positioning system according to claim 1, characterized in that, The second path includes 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 connected to the second antenna, and the two output ports of the sixth dual-pass filter are respectively connected to the third and fourth receiving ports of the receiver, wherein: The third sub-path includes: a path from the second antenna through the fifth double-pass filter, from the first output port of the fifth double-pass filter to the first input port of the second switching element, from the output port of the second switching element through the sixth low-noise amplifier to the sixth double-pass filter, and from the first output port of the sixth double-pass filter to the third receiving port of the receiver; The fourth sub-path includes: a path from the second antenna through the fifth double-pass filter, from the second output port of the fifth double-pass filter to the second input port of the second switching element, from the output port of the second switching element through the sixth low-noise amplifier to the sixth double-pass filter, and from the second output port of the sixth double-pass filter to the fourth receiving port of the receiver.

4. A satellite positioning method for use in a satellite positioning system as described in any one of claims 1-3, the satellite positioning system comprising a first channel and a second channel, wherein the first channel comprises a first sub-channel for receiving GPS signals in a first frequency band and a second sub-channel for receiving GPS signals in a second frequency band; the second channel comprises a third sub-channel for receiving GPS signals in the first frequency band and a fourth sub-channel for receiving GPS signals in the second frequency band; the method comprising: Based on the current operating mode of the positioning system, the first sub-path and / or the third sub-path are selected to receive the first frequency band GPS signal to acquire satellites, and the second sub-path and / or the fourth sub-path are selected to receive the second frequency band GPS signal for positioning; The working mode includes any one of the following: First operating mode: Single-channel L1 band and single-channel L5 band operation; The second working mode is either single-channel L1 band dual-channel L5 band operation or dual-channel L1 band single-channel L5 band operation. For single-channel operation, the sub-channel with the best signal quality is selected to receive L1 band signals, and the sub-channel with the best signal quality is selected to receive L5 band signals. Third working mode: Dual-path L1 band operation or dual-path L5 band operation; Fourth operating mode: simultaneous operation of dual-channel L1 band and simultaneous operation of dual-channel L5 band; The operating mode is switchable based on performance and user requirements, including: after receiving L1 band signals to acquire satellites, the operating mode can be switched to other operating modes to enhance the signal for positioning. When the current positioning system is in the first working mode, the sub-path with the best signal quality in the first frequency band is selected from the first path and the second path to receive the GPS signal in the first frequency band, and the sub-path in the other path used to receive the GPS signal in the second frequency band is used to receive the GPS signal in the second frequency band. When the current positioning system is in the second operating mode, the sub-channel with the best signal quality in the first frequency band is selected from the first and second channels to receive the GPS signal in the first frequency band, and all sub-channels in the first and second channels used to receive the GPS signal in the second frequency band are opened to receive the GPS signal in the second frequency band; or, when the current positioning system is in the second operating mode, all sub-channels in the first and second channels used to receive the GPS signal in the first frequency band are opened to receive the GPS signal in the first frequency band, and the sub-channel with the best signal quality in the second frequency band is selected from the first and second channels to receive the GPS signal in the second frequency band. When the current positioning system is in the third working mode, all sub-channels in the first and second channels used to receive the first frequency band GPS signal are opened to receive the first frequency band GPS signal, or all sub-channels in the first and second channels used to receive the second frequency band GPS signal are opened to receive the second frequency band GPS signal. When the current positioning system is in the fourth working mode, the first sub-channel and the third sub-channel are opened to receive the first frequency band GPS signal, and the second sub-channel and the fourth sub-channel are opened to receive the second frequency band GPS signal.

5. A receiver, characterized in that, It includes a processor and a memory storing a computer program that can run on the processor, wherein the processor executes the program to implement the steps of the satellite positioning method as described in claim 4.

6. A wireless communication device, characterized in that, Including the satellite positioning system as described in any one of claims 1-3.

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