System-level package chip, receiver and electronic equipment

Abstract

The present invention provides a system-level packaged chip, receiver, and electronic device. The chip contains at least a power module, a clock module, a GNSS receiver module, a radio frequency front-end module, and a storage module. The power module, clock module, radio frequency front-end module, and storage module are all connected to the GNSS receiver module. The chip includes a first radio frequency input port, a second radio frequency input port, a third radio frequency input port, and a fourth radio frequency input port. The GNSS receiver module includes four receiving channels. The input end of the radio frequency front-end module is connected to the first radio frequency input port, and its two output ends are connected to two receiving channels. Another output end of the radio frequency front-end module is connected to the second radio frequency input port, and the third radio frequency input port and the fourth radio frequency input port are respectively connected to the other two receiving channels. The chip of the present invention has high integration and can be reused in single-antenna full-frequency positioning scenarios and dual-antenna triple-frequency positioning and direction-finding scenarios.

Description

Technical Field

[0001] The present invention relates to the field of satellite navigation, and in particular to a system-level packaging chip, a receiver and an electronic device. Background Art

[0002] Traditional GNSS (Global Navigation Satellite System) modules typically consist of a radio frequency (RF) device, power supply, clock device, and GNSS receiver chip. Each component is typically packaged separately and interconnected via components such as resistors, capacitors, and inductors. This architecture severely limits module size optimization and integration. On the one hand, the individually packaged components occupy a significant amount of PCB space, and the interconnections between components further complicate layout. This results in the common large dimensions of GNSS modules, such as 16mm*12mm, 16mm*21mm, and 17mm*22mm, making them difficult to meet the stringent requirements for miniaturization. On the other hand, as GNSS systems continue to evolve, the types of navigation signals and frequency bands that modules must process increase. Traditional architectures can only achieve this functionality by stacking more independent components, further increasing module size, power consumption, and cost. Summary of the Invention

[0003] Based on the above situation, the main purpose of the present invention is to provide a system-level package chip, a receiver and an electronic device, in which the system-level package chip has a high degree of integration and can meet the product's requirements for miniaturization.

[0004] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] An embodiment of the present invention provides a system-in-package chip that can be reused in single-antenna full-frequency positioning scenarios and dual-antenna triple-frequency positioning and direction finding scenarios. The chip encapsulates at least a power module, a clock module, a GNSS receiver module, and a radio frequency front-end module, and encapsulates at least one of the power module, the clock module, and the storage module. The power module is used to convert the input voltage into the operating voltage of the GNSS receiver module; the clock module is used to provide a clock signal for the GNSS receiver module; the radio frequency front-end module is connected to the GNSS receiver module and is used to process the received radio frequency signal and input it into the GNSS receiver module; the GNSS receiver module and the storage module exchange data;

[0006] The chip has a first radio frequency input port, a second radio frequency input port, a third radio frequency input port, and a fourth radio frequency input port; the GNSS receiver module includes four receiving channels;

[0007] When the first RF input port is connected to a single antenna, and the second RF input port and the third RF input port are electrically connected outside the chip, the RF front-end module is capable of separating the RF signal received by the single antenna into signals of three configured frequency bands, and inputting the signals into the GNSS receiver module through the three receiving channels, so as to achieve single-antenna full-frequency positioning;

[0008] When the first RF input port is connected to the first antenna, and the third RF input port and the fourth RF input port are connected to the second antenna through a duplexer, the RF front-end module can separate two configured frequency band signals from the first RF signal received by the first antenna, and input them together with the two configured frequency band signals separated by the duplexer from the second RF signal received by the second antenna into the GNSS receiver module through the four receiving channels to achieve dual-antenna three-frequency positioning and orientation.

[0009] Furthermore, the RF front-end module includes a triplexer, the input end of the triplexer is connected to the first RF input port, the first output end and the second output end of the triplexer are respectively connected to the two receiving channels of the GNSS receiver module, and the third output end of the triplexer is connected to the second RF input port; the third RF input port and the fourth RF input port are respectively connected to the other two receiving channels of the GNSS receiver module.

[0010] Furthermore, the GNSS receiver module includes a radio frequency subsystem; the radio frequency subsystem includes a first receiving channel, a second receiving channel, a third receiving channel and a fourth receiving channel, and the radio frequency subsystem is connected to the radio frequency front-end module through each of the receiving channels;

[0011] The RF subsystem down-converts the received RF signal into an intermediate frequency analog signal and then outputs it, or down-converts the received RF signal into an intermediate frequency analog signal and then converts the intermediate frequency analog signal into an intermediate frequency digital signal and then outputs it.

[0012] Furthermore, the GNSS receiver module further includes a baseband subsystem, which is connected to the radio frequency subsystem and processes the signal output by the radio frequency subsystem to obtain a baseband signal.

[0013] Furthermore, the GNSS receiver module also includes an application processor subsystem, which is connected to the baseband subsystem to schedule and configure the baseband subsystem and perform positioning, speed measurement and timing processing based on the observations reported by the baseband subsystem.

[0014] Furthermore, the application processor subsystem is connected to the peripheral interface of the chip, and the peripheral interface includes one or more of a CAN interface, an Ethernet interface, a UART interface, an SPI interface, an I²C interface, a time synchronization signal interface, and a GPIO interface.

[0015] Furthermore, when the chip is used in a single-antenna full-frequency positioning scenario, the frequency bands of the three receiving channels used are respectively configured to be 1559.052MHz~1605.886MHz, 1237.830MHz~1283.865MHz and 1166.220MHz~1237.830MHz.

[0016] Furthermore, when the chip is used in a dual-antenna three-frequency positioning and direction-directing scenario, each antenna uses two receiving channels accordingly, and the frequency bands of the two receiving channels are respectively configured as 1559.052MHz~1605.886MHz and 1237.830MHz~1283.865MHz.

[0017] Furthermore, the duplexer separates the second radio frequency signal into signals in two frequency bands: 1559.052 MHz to 1605.886 MHz and 1237.830 MHz to 1283.865 MHz.

[0018] Furthermore, when the chip is used in a single-antenna full-frequency positioning scenario, the supported global satellite navigation systems and signals include:

[0019] B1I, B1C, B2I, B2a, B2b and B3I signals of the Beidou Satellite Navigation System, L1CA, L1C, L2C and L5 signals of the Global Positioning System, G1 and G2 signals of the GLONASS Global Satellite Navigation System, E1, E5a, E5b and E6 signals of the Galileo Satellite Navigation System, L1CA, L1C, L1S, L5 and L6 signals of the Quasi-Zenith Satellite System, L1 and L5 signals of the Indian Regional Navigation Satellite System, and L1 signal of the Satellite Augmentation System.

[0020] Furthermore, when the chip is used in a dual-antenna, triple-frequency positioning and direction-finding scenario, the supported global satellite navigation systems and signals include:

[0021] B1I, B1C, B2I, B2a and B2b signals of the Beidou Satellite Navigation System, L1CA, L1C, L2C and L5 signals of the Global Positioning System, G1 signal of the GLONASS global satellite navigation system, E1, E5a and E5b signals of the Galileo Satellite Navigation System, L1CA, L1C, L1S and L5 signals of the Quasi-Zenith Satellite System, L1 and L5 signals of the Indian Regional Navigation Satellite System, and L1 signal of the Satellite Augmentation System.

[0022] An embodiment of the present invention also provides a receiver for a satellite navigation system, comprising a single antenna and the above-mentioned system-level package chip, wherein the single antenna is connected to the first RF input port of the system-level package chip, and the second input port and the third input port are connected outside the chip.

[0023] An embodiment of the present invention also provides a receiver for a satellite navigation system, comprising a first antenna, a second antenna, a duplexer and the above-mentioned system-level packaging chip, wherein the first antenna is connected to the first RF input port, the second antenna is connected to the input end of the duplexer, and the two output ends of the duplexer are respectively connected to the third RF input port and the fourth RF input port.

[0024] An embodiment of the present invention further provides an electronic device including the receiver of the satellite navigation system.

[0025] Based on the frequency band occupancy characteristics of existing satellite navigation signals, the present invention adopts mature chip system-level packaging technology to integrate the power module, clock module, GNSS receiver module, RF front-end module and storage module, and proposes an extremely miniaturized GNSS system-level packaging chip RF architecture design scheme. Compared with traditional discrete solutions, this system-level packaging chip can be used in both single-antenna full-frequency positioning scenarios and dual-antenna three-frequency positioning and direction-finding scenarios. On this basis, it can greatly reduce the product design area and promote further miniaturization of the product.

[0026] Other beneficial effects of the present invention will be explained through the introduction of specific technical features and technical solutions in the specific implementation methods. Those skilled in the art should be able to understand the beneficial technical effects brought about by the introduction of these technical features and technical solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0028] Figure 1 This is one of the internal structure diagrams of a system-level package chip according to a preferred embodiment of the present invention;

[0029] Figure 2 This is a second schematic diagram of the internal structure of a system-in-package chip according to a preferred embodiment of the present invention;

[0030] Figure 3 This is a schematic structural diagram of a system-in-package chip according to a preferred embodiment of the present invention when used in a single-antenna full-frequency positioning scenario;

[0031] Figure 4This is a structural diagram of a system-in-package chip according to a preferred embodiment of the present invention used in a dual-antenna triple-frequency positioning and direction-finding scenario;

[0032] Figure 5 This is a structural diagram of a system-level packaging chip in a preferred embodiment of the present invention when used for switching between a single-antenna full-frequency positioning scenario and a dual-antenna triple-frequency positioning and directionality scenario.

[0033] In the picture:

[0034] 1. Power module; 2. Clock module; 3. GNSS receiver module; 31. RF subsystem; 311. First receiving channel; 312. Second receiving channel; 313. Third receiving channel; 314. Fourth receiving channel; 32. Baseband subsystem; 33. Application processor subsystem; 4. RF front-end module; 5. Storage module.

[0035] 10. First RF input port; 20. Second RF input port; 30. Third RF input port; 40. Fourth RF input port. DETAILED DESCRIPTION

[0036] The present invention is described below based on the following embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid obscuring the essence of the present invention, well-known methods, processes, procedures, and components are not described in detail.

[0037] Furthermore, persons of ordinary skill in the art will appreciate that the figures provided herein are for illustration purposes only and are not necessarily drawn to scale.

[0038] Unless the context clearly requires otherwise, throughout the specification and claims, the words "include," "comprising," and similar words should be construed in an inclusive sense rather than an exclusive or exhaustive sense; that is, in the sense of "including but not limited to."

[0039] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0040] Satellite navigation systems provide high-precision positioning, navigation, and timing services around the clock, in all weather conditions, to users worldwide. Currently, the satellite navigation sector primarily encompasses four global navigation satellite systems (GNSS), two regional navigation satellite systems, and multiple satellite-based augmentation systems (SBAS).

[0041] The four global navigation satellite systems (GNSS) include the BeiDou Satellite Navigation System, GPS (Global Positioning System), GLONASS (GLObal NAvigation Satellite System), and Galileo (Galileo Navigation Satellite System). The two regional navigation satellite systems include Japan's Quasi-Zenith Satellite System (QZSS) and India's Indian Regional Navigation Satellite System (IRNSS; also known as NAVIC).

[0042] Four global navigation satellite systems, two regional navigation satellite systems, and multiple satellite-based augmentation systems have jointly created today's multi-system, multi-frequency, and constellation-filled landscape. However, such a multitude of satellite navigation signals poses significant challenges to receiver design.

[0043] Despite attempts to reduce the package size of individual components or optimize their layout on PCBs through surface mount technology, these technologies have yet to overcome the inherent limitations of the discrete component architecture of traditional GNSS modules. Furthermore, traditional GNSS modules require a large number of peripheral components, such as resistors, inductors, and capacitors, to operate, further increasing the size and cost of the modules and reducing their production efficiency and reliability. Therefore, developing a highly integrated GNSS chip that achieves both small size and high reliability has become a pressing technical challenge, crucial for promoting the application of GNSS technology in emerging fields.

[0044] The specific architecture of the system-level package chip of the present invention is described in detail below with reference to the accompanying drawings. Figure 1 The schematic diagram of the structure of the system-in-package chip according to the embodiment of the present invention is shown in FIG. The system-in-package chip provided by the present invention can be used in single-antenna full-frequency positioning scenarios and dual-antenna triple-frequency positioning and direction-direction scenarios.

[0045] like Figure 1As shown, the system-level package chip at least encapsulates a power module 1, a clock module 2, a GNSS receiver module 3, a RF front-end module 4 and a storage module 5, wherein the power module 1 is connected to the clock module 2, the GNSS receiver module 3 and the storage module 5, and the power module 1 converts the input voltage into the operating voltage of the clock module 2, the GNSS receiver module 3 and the storage module 5; the clock module 2 is connected to the GNSS receiver module 3 to provide a clock signal for the GNSS receiver module 3; the RF front-end module 4 is connected to the GNSS receiver module 3 to perform frequency band separation on the received RF signal and input it into the GNSS receiver module 3; the GNSS receiver module 3 and the storage module 5 exchange data.

[0046] The system-level package chip includes a first RF input port 10 , a second RF input port 20 , a third RF input port 30 and a fourth RF input port 40 ; the GNSS receiver module 3 includes four receiving channels.

[0047] When the system-level packaged chip is used in a single-antenna, full-frequency positioning scenario, the first RF input port 10 is connected to the single antenna, and the second RF input port 20 and the third RF input port 30 are electrically connected outside the chip. The first RF input port 10 inputs the RF signal received by the single antenna into the RF front-end module 4, which separates the received RF signal into signals of three configured frequency bands. The signals of the three configured frequency bands are input into the GNSS receiver module 3 through three corresponding receiving channels. The GNSS receiver module 3 processes the received signals to achieve single-antenna, full-frequency positioning. Since these three configured frequency bands correspond to the L1, L2, L5, and L6 frequency bands in the GNSS system, it can be understood that the full-frequency, high-precision positioning function of the GNSS system is achieved.

[0048] When the system-in-package chip is used in a dual-antenna, triple-frequency positioning and heading scenario, the first RF input port 10 inputs the acquired first RF signal into the RF front-end module 4. The RF front-end module 4 separates the first RF signal into signals of two configured frequency bands, which are then input into the GNSS receiver module 3 via two corresponding receiving channels. The third RF input port 30 and the fourth RF input port 40 respectively receive signals of the two configured frequency bands separated from the second RF signal, which are then input into the GNSS receiver module 3 via two other receiving channels. The GNSS receiver module 3 processes the two received signals of the configured frequency bands to implement dual-antenna, triple-frequency positioning and heading. The first RF signal is received via the first antenna, and the second RF signal is received via the second antenna. The configured frequency bands of the signal separated from the first RF signal are the same as those of the signal separated from the second RF signal, namely, the MFH band and the LFL band. These two frequency bands correspond to the L1, L2, and L5 frequency bands in the GNSS system. Therefore, it can be understood that the full-system triple-frequency high-precision positioning and heading function of the GNSS system is implemented.

[0049] Based on the frequency band occupancy characteristics of existing satellite navigation signals, the present invention adopts mature chip system-level packaging technology to integrate the power module 1, clock module 2, GNSS receiver module 3, RF front-end module 4 and storage module 5, resulting in an extremely miniaturized GNSS system-level packaging chip with a size of 7.4mm*7.4mm. This chip realizes multiple functions of traditional module products, such as GNSS full-system high-precision positioning, high-performance processor applications and support for multiple peripheral interfaces, greatly reducing the size of GNSS products and making it more convenient for integration and use in various products and equipment such as drones, robots, and intelligent driving terminals.

[0050] In a specific embodiment, Figure 1 As shown, the power module 1 can convert the 3.3V input voltage into operating voltages such as 0.9V, 1.2V and 1.8V.

[0051] The power supply module 1 provides a 1.8V operating voltage to the clock module 2 .

[0052] Storage module 5 includes both volatile and non-volatile memory. Volatile memory loses data upon power failure, necessitating measures to preserve important data before powering off the system. For example, HyperRAM (a memory that combines pseudo-static random access memory with a HyperBus interface) is used. Non-volatile memory, such as Flash, retains stored data even after a power failure and is suitable for long-term data and program storage. Power module 1 provides 1.8V operating voltage for HyperRAM and 3.3V operating voltage for Flash.

[0053] The power module 1 provides 0.9V, 1.2V, 1.8V and 3.3V operating voltages for each functional module in the GNSS receiver module 3 .

[0054] In the above embodiment, the satellite navigation signal frequency bands are mainly distributed in the following three areas:

[0055] LF region, the frequency range is 1166.220MHz~1283.865MHz;

[0056] MF region, the frequency range is 1530.000MHz~1605.886MHz;

[0057] HF area, the frequency range is 2483.590MHz~2499.910MHz.

[0058] The LF region includes two frequency bands: LFL (Low Frequency Low) from 1166.220 MHz to 1237.830 MHz and LFH (Low Frequency High) from 1237.830 MHz to 1283.865 MHz. The MF region includes MFH (Medium Frequency High) from 1559.052 MHz to 1605.886 MHz.

[0059] The LFL frequency band at least covers the satellite communication frequency band of the Beidou satellite navigation system (such as B2a, B2b, and B2I signals), the satellite communication frequency band of the GPS satellite navigation system (such as L5 and L2C signals), and the satellite communication frequency band of the Galileo satellite navigation system (such as E5a and E5b signals). It can also further cover the satellite communication frequency band of the Quasi-Zenith Satellite System (such as L5 signal) and the satellite communication frequency band of the Indian Regional Navigation Satellite System (such as L5(I) signal).

[0060] The LFH frequency band at least covers the satellite communication frequency band of the GLONASS satellite navigation system (such as the G2 signal), the satellite communication frequency band of the Beidou satellite navigation system (such as the B3I signal), and the satellite communication frequency band of the Galileo satellite navigation system (such as the E6 signal), and can further cover the satellite communication frequency band of the Quasi-Zenith Satellite System (such as the L6 signal).

[0061] The MFH frequency band at least covers the satellite communication frequency band of the Beidou satellite navigation system (such as B1I and B1C signals), the satellite communication frequency band of the GPS satellite navigation system (such as L1CA and L1C signals), and the satellite communication frequency band of the Galileo satellite navigation system (such as E1 signal), and can further cover the satellite communication frequency band of the Quasi-Zenith Satellite System (such as L1CA, L1C, and L1S signals).

[0062] When this system-level packaged chip is used in a single-antenna full-frequency positioning scenario, the RF front-end module 4 separates the RF signal received by the single antenna into signals in the three frequency bands of MFH, LFL and LFH. Correspondingly, the GNSS receiver module 3 has three receiving channels for receiving signals in the three frequency bands of MFH, LFL and LFH, respectively, to achieve single-antenna full-frequency positioning. It should be noted that for satellite navigation systems, their signals are distributed over multiple frequency bands. The three frequency bands of MFH, LFL and LFH cover the main frequency ranges used by the system for positioning, and contain key signal components that can provide accurate position information. By receiving and processing the signals in these three frequency bands, the receiving end can obtain enough information to achieve high-precision positioning, which is equivalent to covering the "full-frequency" signals required for system positioning.

[0063] Each receiving channel receives signals in different frequency bands, which can reduce mutual interference between channels, ensure the purity and stability of signal reception in each channel, improve the overall performance of the receiving system, and enhance the accuracy and reliability of positioning.

[0064] When the system-level packaged chip is used in a dual-antenna, three-frequency positioning and orientation scenario, the RF front-end module 4 separates the RF signal received by the first antenna into signals of the MFH and LFL frequency bands, and the RF signal received by the second antenna can be separated into signals of the MFH and LFL frequency bands through a duplexer externally connected to the system-level packaged chip. Correspondingly, the GNSS receiver module 3 has two groups of receiving channels, each group of receiving channels has two receiving channels, which are used to receive signals of the MFH and LFL frequency bands, respectively, to achieve dual-antenna, three-frequency positioning and orientation. It should be noted that since the MFH and LFL frequency bands cover the L1, L2 and L5 frequency bands of the satellite navigation system, it can be understood as achieving dual-antenna, three-frequency positioning and orientation.

[0065] In a dual-antenna, triple-frequency direction-finding scenario, RF signals are received by both antennas and then separated into signals in the MFH and LFL frequency bands, which are then input into different receive channels of the GNSS receiver module 3. The same signal travels from the satellite to the two antennas, but due to slight differences in the transmission paths, the received signals have a phase difference. The backend algorithm uses this difference in the signal received by the two antennas to estimate the current orientation. Therefore, four receive channels are required to receive the two MFH signals and the two LFL signals, enabling high-precision triple-frequency positioning and direction-finding for the entire GNSS system.

[0066] In a specific embodiment, Figure 2 As shown, the RF front-end module 4 includes a triplexer, the input end of the triplexer is connected to the first RF input port 10, the first output end and the second output end of the triplexer are respectively connected to the two receiving channels of the GNSS receiver module 3, and the third output end of the triplexer is connected to the second RF input port 20; the third RF input port 30 and the fourth RF input port 40 are respectively connected to the other two receiving channels of the GNSS receiver module 3.

[0067] Specifically, the triplexer can be a Tri-Saw triplexer. The Tri-Saw triplexer utilizes the characteristics of SAW devices to filter and separate signals of different frequencies by exciting and propagating surface acoustic waves on the surface of piezoelectric materials. It usually includes three SAW chips and some passive SMT (Surface Mount Technology) components. Each SAW chip is designed to have good filtering performance for signals in a specific frequency range. Through reasonable layout and connection, three filters of different frequencies are combined together to form a triplexer structure, thereby achieving the extraction of signals in three different frequency bands from the input signal, or combining signals in three different frequency bands into one signal output. The Tri-Saw triplexer has the characteristics of high selectivity, high temperature stability, small size and high power handling capability.

[0068] In a specific embodiment, Figure 2 As shown, the GNSS receiver module 3 includes a radio frequency subsystem 31 ; the radio frequency subsystem 31 includes a first receiving channel 311 , a second receiving channel 312 , a third receiving channel 313 and a fourth receiving channel 314 , and the radio frequency subsystem 31 is connected to the radio frequency front-end module 4 through each receiving channel.

[0069] The RF subsystem 31 down-converts the received RF signal into an intermediate frequency analog signal and then outputs it, or down-converts the received RF signal into an intermediate frequency analog signal and then converts the intermediate frequency analog signal into an intermediate frequency digital signal and then outputs it.

[0070] like Figure 3As shown, in a single-antenna full-frequency positioning scenario, the RF subsystem 31 can receive signals in the MFH, LFL, and LFH frequency bands respectively through the first receiving channel 311, the second receiving channel 312, and the third receiving channel 313, and the fourth receiving channel 314 is idle.

[0071] RF signals in the MFH band are input into the GNSS receiver module 3 via the triplexer's first output and first receiving channel 311. RF signals in the LFL band are input into the GNSS receiver module 3 via the triplexer's second output and second receiving channel 312. RF signals in the LFL band are input into the GNSS receiver module 3 via the triplexer's third output, second and third RF input ports 20 and 30, and the third receiving channel. GNSS receiver module 3 processes the received RF signals to achieve single-antenna, full-frequency positioning.

[0072] The RF subsystem 31 can perform down-conversion and low-noise amplification on the received signals in the MFH, LFL, and LFH frequency bands to obtain intermediate frequency analog signals; it can also perform down-conversion, low-noise amplification, and analog-to-digital conversion on the signals in the MFH, LFL, and LFH frequency bands to obtain intermediate frequency digital signals.

[0073] Specifically, the frequency bands of the first receiving channel 311 , the second receiving channel 312 , and the third receiving channel 313 may be configured as 1559.052 MHz to 1605.886 MHz, 1237.830 MHz to 1283.865 MHz, and 1166.220 MHz to 1237.830 MHz, respectively.

[0074] By receiving signals from different frequency bands in parallel through three receiving channels, the chip can simultaneously track signals from multiple satellite navigation systems, achieving full frequency coverage. Signals from different frequency bands are subject to varying degrees of atmospheric delay, multipath effects, and other factors during transmission. By receiving and processing signals from multiple frequency bands, positioning accuracy, signal availability, and security are improved, ensuring the continuity and reliability of positioning services.

[0075] like Figure 4 As shown, in the dual-antenna three-frequency positioning and direction-directing scenario, the RF subsystem 31 can respectively receive the MFH and LFL frequency band signals obtained by separating the RF signal received by the first antenna through the first receiving channel 311 and the second receiving channel 312, and respectively receive the MFH and LFL frequency band signals obtained by separating the RF signal received by the second antenna through the third receiving channel 313 and the fourth receiving channel 314.

[0076] The MFH-band RF signal derived from the satellite navigation signal received by the first antenna is input into the GNSS receiver module 3 via the first output port of the triplexer and the first receiving channel 311. The LFL-band RF signal is input into the GNSS receiver module 3 via the second output port of the triplexer and the second receiving channel 312. The MFH-band RF signal derived from the satellite navigation signal received by the second antenna is input into the GNSS receiver module 3 via the third RF input port 30 and the third receiving channel 313. The LFL-band RF signal is input into the GNSS receiver module 3 via the fourth RF input port 40 and the fourth receiving channel 314. The GNSS receiver module 3 processes the received RF signals to achieve dual-line triple-frequency positioning and direction finding.

[0077] Specifically, the frequency bands of the first receiving channel 311 and the second receiving channel 312 can be configured as 1559.052MHz~1605.886MHz and 1237.830MHz~1283.865MHz respectively, and the frequency bands of the third receiving channel 313 and the fourth receiving channel 314 can be configured as 1559.052MHz~1605.886MHz and 1237.830MHz~1283.865MHz respectively.

[0078] By using four receive channels to receive signals from two frequency bands (each including MFH and LFL bands), the chip can simultaneously track signals from multiple satellite navigation systems, achieving coverage of the L1, L2, and L5 bands of the GPS system. The MFH band typically carries high-bitrate signals and has a wider signal bandwidth, providing more accurate pseudorange measurements. The LFL band is less affected by ionospheric delay. When the two bands are combined, a dual-frequency differential algorithm can offset atmospheric delay errors, improving positioning accuracy to sub-meter levels. The MFH band has a shorter wavelength, which can be mitigated by correlator technology. The LFL band has a longer wavelength, providing less attenuation when penetrating obstacles. When the two bands work together, they can inter-check signals across multiple bands, reducing positioning errors caused by multipath or interference in a single band.

[0079] In addition, due to slight differences in the transmission paths of the same signal from the satellite to the two antennas, the two antennas receive the same signal with a phase difference. The back-end algorithm can evaluate the current position and orientation of the receiver based on the difference between the first and second antennas. Therefore, it is necessary to receive the same satellite signal from the first and second antennas respectively. Usually, receiving signals in the LFL and MFH frequency bands can meet the requirements of the dual-antenna scenario. Therefore, the GNSS receiver module 3 needs to be equipped with four receiving channels to receive and process two LFL and two MFH signals, thereby realizing high-precision positioning and orientation of the three-frequency GNSS full system.

[0080] In some embodiments, the GNSS receiver module 3 further includes a baseband subsystem 32 , which is connected to the radio frequency subsystem 31 and processes the signal output by the radio frequency subsystem 31 to obtain a baseband signal.

[0081] Specifically, the baseband subsystem 32 can perform analog-to-digital conversion, signal capture, signal tracking, signal demodulation, and positioning observation data calculation on the intermediate frequency analog signal; the baseband subsystem 32 can also directly perform signal capture, signal tracking, signal demodulation, and positioning observation data calculation on the intermediate frequency digital signal.

[0082] In some embodiments, the GNSS receiver module 3 also includes an application processor subsystem 33, which is connected to the baseband subsystem 32, schedules and configures the baseband subsystem 32, and performs positioning, speed measurement and timing processing based on the positioning observations reported by the baseband subsystem 32.

[0083] Specifically, the application processor subsystem 33 can use positioning observations such as pseudorange and carrier phase, combined with the satellite coordinates in the navigation message, to calculate the three-dimensional position, time and speed of the receiver. It can also jointly process the positioning observations of each satellite navigation system to improve positioning reliability and anti-interference capability, and improve positioning accuracy and stability.

[0084] In the above embodiment, if Figure 1 As shown, the application processor subsystem 33 is connected to the peripheral interface 50 of the chip, and the peripheral interface includes one or more of a CAN interface, an Ethernet interface, an eMMC interface, a UART interface, an SPI interface, an I²C interface, a time synchronization signal interface, and a GPIO interface.

[0085] Among them, the CAN interface is used to connect to components that support the CAN protocol; the Ethernet interface is used to connect to the Ethernet chip or interface; the eMMC interface is used to connect to the flash memory or EEPRAM; the UART interface is used to connect to the chip or interface that supports the UART serial port protocol; the SPI interface is used to connect to the chip or interface that supports the SPI protocol; the I²C interface is used to connect to the chip or interface that supports the I²C serial port protocol; the time synchronization signal interface is used to output a fixed-frequency second pulse signal; the GPIO interface is used for GPIO signal input and output connections, and specific applications can be configured through software.

[0086] By providing various peripheral interfaces 50, the system-in-package chip provided by the present invention can adapt to diverse scenarios, such as automotive, industrial equipment, and consumer electronics, reducing product adaptation costs. Dedicated interfaces such as CAN, Ethernet, and eMMC ensure high performance and low power consumption for the chip's core positioning functions. Communication interfaces such as UART, SPI, I²C, time synchronization signal interfaces, and GPIO facilitate external communication links, enabling the chip to meet the technical requirements of high-precision positioning while adapting to diverse application scenarios.

[0087] In some embodiments, when the chip is used in a single-antenna full-frequency positioning scenario, the supported global satellite navigation systems and signals include:

[0088] B1I, B1C, B2I, B2a, B2b and B3I signals of the Beidou Satellite Navigation System, L1CA, L1C, L2C and L5 signals of the Global Positioning System, G1 and G2 signals of the GLONASS Global Satellite Navigation System, E1, E5a, E5b and E6 signals of the Galileo Satellite Navigation System, L1CA, L1C, L1S, L5 and L6 signals of the Quasi-Zenith Satellite System, L1 and L5 signals of the Indian Regional Navigation Satellite System, and L1 signal of the Satellite Augmentation System.

[0089] When the chip is used in dual-antenna, triple-frequency positioning and direction-finding scenarios, the supported global satellite navigation systems and signals include:

[0090] B1I, B1C, B2I, B2a and B2b signals of the Beidou Satellite Navigation System, L1CA, L1C, L2C and L5 signals of the Global Positioning System, G1 signal of the GLONASS global satellite navigation system, E1, E5a and E5b signals of the Galileo Satellite Navigation System, L1CA, L1C, L1S and L5 signals of the Quasi-Zenith Satellite System, L1 and L5 signals of the Indian Regional Navigation Satellite System, and L1 signal of the Satellite Augmentation System.

[0091] The system-level package chip provided in the embodiment of the present invention highly integrates a power module 1, a clock module 2, a GNSS receiver module 3, a radio frequency front-end module 4, a storage module 5, etc., greatly reducing the size of the chip.

[0092] In modern electronic devices, such as smartphones and portable wireless devices, where space is at a premium, this miniaturized chip frees up space for other components, contributing to the device's slimmer and more compact design. Furthermore, by integrating multiple functional modules into the same package, the connection distances between modules are significantly shortened, shortening the signal transmission path. This effectively reduces signal transmission loss and interference, and improves signal transmission stability and speed. This enables devices using this system-in-package chip to accurately and quickly process received signals.

[0093] An embodiment of the present invention also provides a receiver for a satellite navigation system, which includes the system-level package chip and a single antenna as described above, the single antenna is connected to the first RF input port 10 of the system-level package chip, and the second RF input port 20 and the third RF input port 30 are connected outside the chip.

[0094] The single antenna receives satellite radio frequency signals and converts them into electrical signals, providing the basis for subsequent signal processing. Leveraging its system-level packaging advantages, the chip integrates multiple functional modules and possesses powerful signal processing capabilities.

[0095] After the single antenna receives satellite RF signals and converts them into electrical signals, these signals are transmitted via a connecting line to the first RF input port 10 of the system-in-package chip. The RF front-end module 4 within the system-in-package chip performs preliminary processing on the input RF signals, including separation, amplification, and filtering. Because satellite signals are subject to various interference and attenuation during transmission, these processing steps in the RF front-end module 4 effectively improve the quality and strength of the signals, making them more suitable for subsequent processing. The RF signals output by the RF front-end module 4 are input into the RF subsystem 31.

[0096] The baseband subsystem 32 within the SIP receives and processes the signals processed by the RF subsystem 31, including signal capture, tracking, and message demodulation. When the input signal to the baseband subsystem 32 is analog, an analog-to-digital converter (ADC) is required for sampling.

[0097] The application processor subsystem 33 inside the system-level package chip is used to schedule and configure the baseband subsystem 32, and perform positioning, speed measurement, and timing processing based on the observation values ​​reported by the baseband subsystem 32.

[0098] An embodiment of the present invention also provides another receiver for a satellite navigation system, which includes a first antenna, a second antenna, the system-level packaging chip as described above, and a duplexer, wherein the first antenna is connected to the first RF input port 10, the second antenna is connected to the input end of the duplexer, and the two output ends of the duplexer are respectively connected to the third RF input port 30 and the fourth RF input port 40.

[0099] The first and second antennas are used to receive satellite radio frequency signals and convert them into electrical signals, providing the basis for subsequent signal processing. The system-in-package chip is the core processing unit of the entire receiver. Leveraging the advantages of system-in-package, it integrates multiple functional modules and possesses powerful signal processing capabilities.

[0100] The satellite RF signal received by the first antenna is divided into signals of the MFH and LFL frequency bands by a triplexer inside the system-level package chip. The satellite RF signal received by the second antenna is divided into signals of the MFH and LFL frequency bands by a duplexer outside the system-level package chip.

[0101] The RF subsystem 31 within the SIP performs preliminary processing on the two incoming signals (each containing signals in the MFH and LFL bands), including amplification and filtering. Because satellite signals are subject to various interference and attenuation during transmission, these processing steps in the RF subsystem 31 effectively improve signal quality and strength, making them more suitable for subsequent processing.

[0102] The baseband subsystem 32 within the SIP receives and processes the signals processed by the RF subsystem 31, including signal capture, tracking, and message demodulation. When the input signal to the baseband subsystem 32 is analog, an analog-to-digital converter (ADC) is required for sampling.

[0103] The application processor subsystem 33 inside the system-level package chip is used to schedule and configure the baseband subsystem 32, and perform positioning, speed measurement, and timing processing based on the observation values ​​reported by the baseband subsystem 32.

[0104] like Figure 5 As shown, an embodiment of the present invention further provides a receiver for a satellite navigation system, comprising a first antenna, a second antenna, a duplexer, a radio frequency switch, and the aforementioned system-in-package chip. The radio frequency switch can selectively connect the second radio frequency input port 20 to the third radio frequency input port 30, or connect the third radio frequency input port 30 to one output port of the duplexer, depending on the need to implement a single-antenna full-frequency positioning function or a dual-antenna triple-frequency positioning and direction-finding function.

[0105] Specifically, when the single-antenna full-frequency positioning function is implemented, the first antenna is connected to the first RF input port 10, and the second RF input port 20 is connected to the third RF input port 30 outside the chip through a RF switch.

[0106] The triplexer separates the satellite navigation signals received by the first antenna to generate RF signals in the MFH, LFL, and LFH bands. The MFH band RF signal is input into GNSS receiver module 3 via the triplexer's first output and first receive channel. The LFL band RF signal is input into GNSS receiver module 3 via the triplexer's second output and second receive channel. The LFH band RF signal is input into GNSS receiver module 3 via the triplexer's third output, second and third RF input ports 20 and 30, and third receive channel. GNSS receiver module 3 processes the received RF signals to achieve single-antenna, full-frequency positioning.

[0107] When realizing the dual-antenna triple-frequency positioning and direction-directing function, the first antenna is connected to the first RF input port 10, the second antenna is connected to the input end of the duplexer, one output end of the duplexer is connected to the third RF input port 30 through the RF switching switch, and the other output end of the duplexer is connected to the fourth RF input port 40.

[0108] The triplexer separates the satellite navigation signals received by the first antenna to generate RF signals in the MFH, LFL, and LFH bands. The MFH band RF signal is input into the GNSS receiver module 3 via the triplexer's first output and first receive channel. The LFL band RF signal is input into the GNSS receiver module 3 via the triplexer's second output and second receive channel. The LFH band RF signal is discarded and not subsequently transmitted or processed.

[0109] The duplexer separates the satellite navigation signals received by the second antenna, generating RF signals in the MFH and LFL bands. The MFH band RF signal is input into the GNSS receiver module 3 via the duplexer's first output, third RF input port 30, and fourth receive channel. The LFL band RF signal is input into the GNSS receiver module 3 via the duplexer's second output, fourth RF input port 40, and fourth receive channel. The GNSS receiver module 3 processes the received RF signals, thereby achieving dual-antenna, triple-frequency positioning and direction finding.

[0110] By setting up an RF switch, the third RF input port 30 can be connected to the second RF input port 20 or the duplexer, thereby using two antennas to switch between single-antenna full-frequency positioning and dual-antenna triple-frequency positioning and direction finding. Specifically, when implementing the dual-antenna triple-frequency positioning and direction finding function, the antenna used to implement the single-antenna full-frequency positioning function can be reused.

[0111] The receiver of this satellite navigation system uses two antennas and a system-level packaging chip to meet the needs of both single-antenna full-frequency positioning and dual-antenna three-frequency positioning and direction finding scenarios, thereby reducing hardware costs and reducing equipment size and weight; at the same time, the reduction in the number of antennas can simplify the complexity of system design, reduce power consumption and electromagnetic compatibility design difficulty.

[0112] An embodiment of the present invention further provides an electronic device, which includes the receiver of the satellite navigation system as described above.

[0113] Among them, the electronic device can be professional-grade products such as drones, robots and intelligent driving terminals, or consumer-grade products such as smartphones, smart watches, tablets and navigators.

[0114] Those skilled in the art will appreciate that, provided there is no conflict, the above preferred solutions can be freely combined and superimposed.

[0115] It should be understood that the above-mentioned embodiments are merely illustrative and non-restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions that can be made by those skilled in the art to the above-mentioned details will be included in the scope of the claims of the present invention.

Claims

1. A system-level package chip, characterized in that: The chip can be reused in single-antenna full-frequency positioning scenarios and dual-antenna triple-frequency positioning and heading scenarios. The chip encapsulates a GNSS receiver module and a radio frequency front-end module, and at least one of a power module, a clock module, and a storage module. The power module is used to convert the input voltage into the operating voltage of the GNSS receiver module; the clock module is used to provide a clock signal for the GNSS receiver module; the radio frequency front-end module is connected to the GNSS receiver module and is used to process the received radio frequency signal and input it into the GNSS receiver module; the GNSS receiver module exchanges data with the storage module; the chip has a first radio frequency input port, a second radio frequency input port, a third radio frequency input port, and a fourth radio frequency input port; the GNSS receiver module includes four receiving channels; When the first RF input port is connected to a single antenna, and the second RF input port and the third RF input port are electrically connected outside the chip, the RF front-end module is capable of separating the RF signal received by the single antenna into signals of three configured frequency bands and inputting the signals into the GNSS receiver module through three receiving channels, thereby achieving single-antenna full-frequency positioning; When the first RF input port is connected to the first antenna, and the third RF input port and the fourth RF input port are connected to the second antenna through a duplexer, the RF front-end module can separate two configured frequency band signals from the first RF signal received by the first antenna, and input them together with the two configured frequency band signals separated by the duplexer from the second RF signal received by the second antenna into the GNSS receiver module through four receiving channels to achieve dual-antenna three-frequency positioning and orientation.

2. The system-in-package chip according to claim 1, wherein: The RF front-end module includes a triplexer, wherein an input end of the triplexer is connected to the first RF input port, a first output end and a second output end of the triplexer are respectively connected to the two receiving channels of the GNSS receiver module, and a third output end of the triplexer is connected to the second RF input port; The third RF input port and the fourth RF input port are respectively connected to the other two receiving channels of the GNSS receiver module.

3. The system-in-package chip according to claim 1, wherein: The GNSS receiver module includes a radio frequency subsystem; the radio frequency subsystem includes a first receiving channel, a second receiving channel, a third receiving channel, and a fourth receiving channel, and the radio frequency subsystem is connected to the radio frequency front-end module through each of the receiving channels; The RF subsystem down-converts the received RF signal into an intermediate frequency analog signal and then outputs it, or down-converts the received RF signal into an intermediate frequency analog signal and then converts the intermediate frequency analog signal into an intermediate frequency digital signal and then outputs it.

4. The system-in-package chip according to claim 3, wherein: The GNSS receiver module further includes a baseband subsystem, which is connected to the radio frequency subsystem and processes the signal output by the radio frequency subsystem to obtain a baseband signal.

5. The system-in-package chip according to claim 4, wherein: The GNSS receiver module also includes an application processor subsystem, which is connected to the baseband subsystem to schedule and configure the baseband subsystem and perform positioning, speed measurement and timing processing based on the observations reported by the baseband subsystem.

6. The system-in-package chip according to claim 5, wherein: The application processor subsystem is connected to the peripheral interface of the chip, and the peripheral interface includes one or more of a CAN interface, an Ethernet interface, a UART interface, an SPI interface, an I²C interface, a time synchronization signal interface, and a GPIO interface.

7. The system-in-package chip according to any one of claims 1 to 6, characterized in that: When the chip is used in a single-antenna full-frequency positioning scenario, the frequency bands of the three receiving channels used are configured as 1559.052MHz~1605.886MHz, 1237.830MHz~1283.865MHz, and 1166.220MHz~1237.830MHz respectively.

8. The system-in-package chip according to any one of claims 1 to 6, characterized in that: When the chip is used in a dual-antenna, three-frequency positioning and direction-directing scenario, each antenna uses two receiving channels accordingly, and the frequency bands of the two receiving channels are configured as 1559.052MHz~1605.886MHz and 1237.830MHz~1283.865MHz respectively.

9. The system-in-package chip according to any one of claims 1 to 6, wherein: The duplexer separates the second radio frequency signal into signal modules in two frequency bands: 1559.052 MHz to 1605.886 MHz and 1237.830 MHz to 1283.865 MHz.

10. The system-in-package chip according to any one of claims 1 to 6, characterized in that: When the chip is used in a single-antenna, full-frequency positioning scenario, the supported global satellite navigation systems and signals include: B1I, B1C, B2I, B2a, B2b and B3I signals of the Beidou Satellite Navigation System, L1CA, L1C, L2C and L5 signals of the Global Positioning System, G1 and G2 signals of the GLONASS Global Satellite Navigation System, E1, E5a, E5b and E6 signals of the Galileo Satellite Navigation System, L1CA, L1C, L1S, L5 and L6 signals of the Quasi-Zenith Satellite System, L1 and L5 signals of the Indian Regional Navigation Satellite System, and L1 signal of the Satellite Augmentation System.

11. The system-in-package chip according to any one of claims 1 to 6, characterized in that: When the chip is used in a dual-antenna, triple-frequency positioning and direction-finding scenario, the supported global satellite navigation systems and signals include: B1I, B1C, B2I, B2a and B2b signals of the Beidou Satellite Navigation System, L1CA, L1C, L2C and L5 signals of the Global Positioning System, G1 signal of the GLONASS global satellite navigation system, E1, E5a and E5b signals of the Galileo Satellite Navigation System, L1CA, L1C, L1S and L5 signals of the Quasi-Zenith Satellite System, L1 and L5 signals of the Indian Regional Navigation Satellite System, and L1 signal of the Satellite Augmentation System.

12. A receiver for a satellite navigation system, characterized in that: It comprises a single antenna and a system-level package chip as described in any one of claims 1 to 11, wherein the single antenna is connected to the first RF input port of the system-level package chip, and the second RF input port and the third RF input port are connected outside the chip.

13. A receiver for a satellite navigation system, characterized in that: The system-level package chip comprises a first antenna, a second antenna, a duplexer, and the system-level package chip according to any one of claims 1 to 11, wherein the first antenna is connected to the first RF input port, the second antenna is connected to the input end of the duplexer, and the two output ends of the duplexer are respectively connected to the third RF input port and the fourth RF input port.

14. A receiver for a satellite navigation system, characterized in that: comprising a first antenna, a second antenna, a duplexer, a radio frequency switch, and a system-level package chip according to any one of claims 1 to 11; When implementing the single-antenna full-frequency positioning function, the first antenna is connected to the first RF input port, and the second RF input port is connected to the third RF input port outside the chip through the RF switching switch; When implementing the dual-antenna three-frequency positioning and direction-direction function, the first antenna is connected to the first RF input port, the second antenna is connected to the input end of the duplexer, one output end of the duplexer is connected to the third RF input port through the RF switching switch, and the other output end of the duplexer is connected to the fourth RF input port.

15. An electronic device, characterized in that: A receiver comprising a satellite navigation system as claimed in claim 12, 13 or 14.

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