SIP chip, receiver and electronic equipment

Abstract

The invention provides an SIP (Session Initiation Protocol) chip, a receiver and electronic equipment, a first input port in the SIP chip is connected with an input end of a triplexer, a first output end and a second output end of the triplexer are respectively and correspondingly connected with a first receiving channel and a second receiving channel, and a third output end of the triplexer is connected with a second input port; the third and fourth input ports are correspondingly connected with the third and fourth receiving channels respectively; when the SIP chip is used for a single-antenna full-frequency positioning scene, the first input port is connected with the single antenna, the second input port is connected with the third input port, and the central processing unit configures the frequency band of the third receiving channel as a first configuration frequency band; when the SIP chip is used for a double-antenna three-frequency positioning and orientation scene, the first input port is connected with the first antenna, the third input port and the fourth input port are respectively connected with two output ends of the duplexer, and the central processing unit configures the frequency band of the third receiving channel as a second configuration frequency band; wherein the input end of the duplexer is connected with the second antenna.

Description

Technical Field

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

[0002] The RF front-end of a multi-frequency GNSS (Global Navigation Satellite System) receiver generally includes two architecture forms. One is a single-antenna architecture form, and the other is a dual-antenna architecture form. The single-antenna architecture form is used for pure high-precision positioning scenarios. The satellite signal is received by a single antenna and divided into different frequencies such as LFL, LFH, and MFH after being filtered by RF front-end devices, and then input into different receiving ports of the receiver chip respectively. Limited by the intermediate frequency bandwidth and the ADC bandwidth, the receiver chip usually needs to use three different receiving ports to process signals such as LFL, LFH, and MFH respectively, so as to achieve high-precision positioning of the entire GNSS system at all frequency points. The dual-antenna architecture form can be used not only for high-precision positioning scenarios but also for GNSS orientation scenarios. The satellite signal is received by two antennas and divided into different frequencies such as LFL and MFH after being filtered by RF front-end devices, and then input into different receiving ports of the receiver chip respectively. For the same signal from the satellite to the two antennas, due to some differences in the transmission paths, there will be a phase difference between the same signal received by the two antennas. The backend algorithm can evaluate the current position orientation based on the differences of the same signal between the main and auxiliary antennas. Therefore, the receiver chip needs two different receiving ports to receive the same satellite signal from the main and auxiliary antennas. Usually, receiving LFL and MFH signals can meet the requirements of the dual-antenna scenario. Therefore, the receiver needs to use 4 receiving ports to process 2 paths of LF and 2 paths of MFH signals, so as to achieve high-precision positioning and orientation of the entire GNSS system at three frequency points.

[0003] In the process of implementing single-antenna positioning and dual-antenna positioning and orientation in current common product forms, a large design area needs to be occupied, which seriously restricts the development of products towards smaller sizes and hinders the further miniaturization of products. Summary of the Invention

[0004] Based on the above situation, the main purpose of the present invention is to provide a SIP chip, a receiver, and an electronic device, which can reduce the product design area on the basis that the SIP chip can be applied to both single-antenna full-frequency positioning scenarios and dual-antenna three-frequency positioning and orientation scenarios.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: An embodiment of the present invention provides a SIP chip, which can be used in a single-antenna full-frequency positioning scenario or a dual-antenna triple-frequency positioning and orientation scenario. The SIP chip has a first input port, a second input port, a third input port, and a fourth input port, and includes a diplexer, a radio frequency signal processing module, a baseband signal processing module, and a central processor. The first input port is connected to the input end of the diplexer. The first output end and the second output end of the diplexer are respectively connected to the first receiving channel and the second receiving channel of the radio frequency signal processing module, and the third output end of the diplexer is connected to the second input port. The third input port is connected to the third receiving channel of the radio frequency signal processing module, and the fourth input port is connected to the fourth receiving channel of the radio frequency signal processing module. The output end of the radio frequency signal processing module is connected to the input end of the baseband signal processing module, and the output end of the baseband signal processing module is connected to the central processor.

[0006] When the SIP chip is used in a single-antenna full-frequency positioning scenario, the first input port is connected to a single antenna, the second input port and the third input port are electrically connected outside the SIP chip, and the central processor configures the frequency band of the third receiving channel as a first configured frequency band. When the SIP chip is used in a dual-antenna triple-frequency positioning and orientation scenario, the first input port is connected to the first antenna, the third input port and the fourth input port are respectively connected to two output ends of a duplexer, and the central processor configures the frequency band of the third receiving channel as a second configured frequency band, and the second input port is not connected to the first antenna or the second antenna. Wherein, the input end of the duplexer is connected to the second antenna, and the frequency bands of the first configured frequency band and the second configured frequency band are different.

[0007] Optionally, the central processor configures the frequency band of the first receiving channel as a third configured frequency band, and the central processor configures the frequency band of the second receiving channel as a fourth configured frequency band. The third configured frequency band is 1559.052 MHz to 1605.886 MHz, and the fourth configured frequency band is 1166.220 MHz to 1237.830 MHz.

[0008] Optionally, when the SIP chip is used in a single-antenna full-frequency positioning scenario, the local oscillator frequency corresponding to the first receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the third configured frequency band; the local oscillator frequency corresponding to the second receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the fourth configured frequency band; the central processing unit configures the frequency band of the third receiving channel as the first configured frequency band, and the local oscillator frequency corresponding to the third receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the first configured frequency band.

[0009] Optionally, when the SIP chip is used in a single-antenna full-frequency positioning scenario, the first configured frequency band is 1237.830 MHz to 1283.865 MHz, and the fourth receiving channel is idle.

[0010] Optionally, when the SIP chip is used in a single-antenna full-frequency positioning scenario, the supported global navigation satellite systems and signals include: The B1I, B1C, B2I, B2a, B2b, and B3I signals of the Beidou Navigation Satellite System, the L1CA, L1C, L2C, and L5 signals of the Global Positioning System, the G1 and G2 signals of the GLONASS Global Navigation Satellite System, the E1, E5a, E5b, and E6 signals of the Galileo Satellite Navigation System, the L1CA, L1C, L1S, L5, and L6 signals of the Quasi-Zenith Satellite System, the L1 and L5 signals of the Indian Regional Navigation Satellite System, and the L1 signal of the Satellite Based Augmentation System.

[0011] Optionally, when the SIP chip is used in a dual-antenna triple-frequency positioning and orientation scenario, the local oscillator frequency corresponding to the first receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the third configured frequency band; the local oscillator frequency corresponding to the second receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the fourth configured frequency band; the central processing unit configures the frequency band of the third receiving channel as the second configured frequency band, and the local oscillator frequency corresponding to the third receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the second configured frequency band; the local oscillator frequency corresponding to the fourth receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the fourth configured frequency band; wherein, the second configured frequency band is the same as the third configured frequency band.

[0012] Optionally, when the SIP chip is used in a dual-antenna triple-frequency positioning and orientation scenario, the second input port is idle, and the second configured frequency band is 1559.052 MHz to 1605.886 MHz.

[0013] Optionally, when the SIP chip is used in a dual-antenna triple-frequency positioning and orientation scenario, the supported global navigation satellite systems and signals include: The B1I, B1C, B2I, B2a, and B2b signals of the Beidou satellite navigation system, the L1CA, L1C, L2C, and L5 signals of the Global Positioning System, the G1 signal of the GLONASS global satellite navigation system, the E1, E5a, and E5b signals of the Galileo satellite navigation system, the L1CA, L1C, L1S, and L5 signals of the quasi-zenith satellite system, the L1 and L5 signals of the Indian Regional Navigation Satellite System, and the L1 signal of the satellite augmentation system.

[0014] An embodiment of the present invention also provides a receiver for a satellite navigation system, which includes a single antenna and the above SIP chip. The single antenna is connected to the first input port of the SIP chip, and the second input port is connected to the third input port outside the SIP chip.

[0015] An embodiment of the present invention also provides a receiver for a satellite navigation system, which includes a first antenna, a second antenna, a duplexer, and the above SIP chip. The first antenna is connected to the first 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 input port and the fourth input port.

[0016] An embodiment of the present invention also provides an electronic device, which includes the receiver of the above satellite navigation system.

[0017] According to the frequency band occupancy characteristics of existing satellite navigation signals, the present invention adopts the mature chip SIP packaging technology to integrate the triplexer with the radio frequency signal processing module, the baseband signal processing module, and the central processor, and proposes an extremely miniaturized GNSS SIP chip radio frequency architecture design scheme. Compared with the traditional discrete scheme, this SIP chip can be applied to both single-antenna full-frequency positioning scenarios and dual-antenna triple-frequency positioning and orientation scenarios, and on this basis, it can still greatly reduce the product design area and promote the further miniaturization of the product.

[0018] Other beneficial effects of the present invention will be described in the specific implementation manner through the introduction of specific technical features and technical solutions. Those skilled in the art should be able to understand the beneficial technical effects brought by the technical features and technical solutions through these introductions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the basic architecture of signal processing for a traditional single-antenna GNSS positioning receiver; Figure 2 It is a schematic diagram of the basic architecture of signal processing for a traditional dual-antenna GNSS positioning and orientation receiver; Figure 3Schematic diagram of the architecture of a SIP chip according to a preferred embodiment of the present invention; Figure 4 Schematic diagram of the architecture of a SIP chip according to a preferred embodiment of the present invention when used in a single - antenna full - frequency positioning scenario; Figure 5 Schematic diagram of the architecture of a SIP chip according to a preferred embodiment of the present invention when used in a dual - antenna triple - frequency positioning and orientation scenario.

[0021] In the figure: 1. First input port; 2. Second input port; 3. Third input port; 4. Fourth input port; 5. Diplexer; 6. RF signal processing module; 61. First receiving channel; 62. Second receiving channel; 63. Third receiving channel; 64. Fourth receiving channel; 7. Baseband signal processing module; 8. Central processing unit. Detailed implementation manners

[0022] The present invention will be described 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.

[0023] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0024] Unless the context clearly requires otherwise, the words such as "including", "comprising", and the like in the whole specification and claims should be interpreted in an inclusive sense rather than an exclusive or exhaustive sense; that is, the meaning of "including but not limited to".

[0025] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0026] Satellite navigation systems can provide all - weather, all - time, and high - precision positioning, navigation, and timing services for global users. Currently, the satellite navigation field mainly covers four global satellite navigation systems (i.e., GNSS), two regional satellite navigation systems, and multiple satellite - based augmentation systems (SBAS).

[0027] Among them, the four global navigation satellite systems include the Beidou satellite navigation system, GPS (Global Positioning System), GLONASS (GLObal NAvigation Satellite System), and Galileo, which are collectively known as the four major GNSS. The two regional satellite navigation systems include Japan's Quasi-Zenith Satellite System (QZSS) and India's Indian Regional Navigation Satellite System (IRNSS; also known as NAVIC).

[0028] The four global satellite navigation systems, two regional satellite navigation systems, and multiple satellite-based augmentation systems together construct the current pattern of multiple systems, multiple frequency points, and satellites all over the sky. However, such a large number of satellite navigation signals pose a huge challenge to the design of receivers, especially in the aspect of radio frequency front-end signal processing.

[0029] The currently common GNSS solutions adopt a discrete design, where the receiver chip and radio frequency front-end devices are independently packaged, with a low degree of integration. When implementing single- and dual-antenna solutions, a large design area is required.

[0030] Specifically, as Figure 1 shown, the traditional single-antenna architecture requires the receiver chip to have 3 receiving ports to receive signals in three frequency ranges: LFL (Low Frequency Low), LFH (Low Frequency High), and MFH (Medium Frequency High). After the LFL, LFH, and MFH signals of GNSS are received from the air through 1 antenna, through the radio frequency front-end, the signal is divided into three paths: LFL, LFH, and MFH, and respectively input into the 3 receiving ports of the receiver chip; then, the three paths of signals are down-converted by the analog circuit in the chip, and after being sampled by the ADC (Analog-to-Digital Converter), they are transmitted to the backend digital circuit. Subsequently, through the processing of the digital signal module and algorithm operations, the position information is finally obtained. Among them, the radio frequency front-end includes at least one Diplexer, two band-pass filters, and one power divider. It can be seen that in this solution, at least 4 radio frequency discrete devices need to cooperate with the receiver chip to work together.

[0031] As Figure 2As shown in the figure, the traditional dual-antenna architecture requires the receiver chip to have four receiving ports to receive two signals in the LFL frequency range and two signals in the MFH frequency range respectively. After the GNSS RF signals are received from the air through two antennas, the RF signal received by the first antenna is input into the first RF front-end. The signal is divided into two paths, LFL and MFH, by the first RF front-end and then input into two receiving ports of the receiver chip respectively. The RF signal received by the second antenna is input into the second RF front-end. The signal is also divided into two paths, LFL and MFH, by the second RF front-end and then input into the other two receiving ports of the receiver chip respectively. Then, the four signals are down-converted by the RF signal processing module in the chip and then transmitted to the backend baseband signal processing module after ADC sampling. Subsequently, through the processing of the central processor and algorithm operations, the position information and direction information are finally obtained. Among them, each RF front-end includes at least one Diplexer and two band-pass filters. It can be seen that in this solution, at least six RF discrete devices need to be coordinated with the receiver chip to work together.

[0032] In summary, in the traditional single- and dual-antenna solutions, the receiver chip needs to be equipped with multiple RF front-end devices to achieve frequency division and filtering functions. The RF front-end devices occupy a large design area of the product, making it difficult to further miniaturize the product.

[0033] Therefore, based on the existing satellite navigation signals and the mature chip SIP packaging technology, it is necessary to develop a new SIP chip, which can greatly reduce the product design area and promote the further miniaturization of the product when meeting the requirements of different form products with single antenna and dual antenna.

[0034] The following will describe the specific architecture of the SIP chip of the present invention in detail with reference to the accompanying drawings. Figure 3 It is a schematic structural diagram of the SIP chip according to an embodiment of the present invention.

[0035] As Figure 3 shown, the SIP chip has a first input port 1, a second input port 2, a third input port 3 and a fourth input port 4, and includes a triplexer 5, an RF signal processing module 6, a baseband signal processing module 7 and a central processor 8. The first input port 1 is connected to the input end of the triplexer 5. The first output end and the second output end of the triplexer 5 are respectively connected to the first receiving channel 61 and the second receiving channel 62 of the RF signal processing module 6. The third output end of the triplexer 5 is connected to the second input port 2. The third input port 3 is connected to the third receiving channel 63 of the RF signal processing module 6. The fourth input port 4 is connected to the fourth receiving channel 64 of the RF signal processing module 6. The output end of the RF signal processing module 6 is connected to the input end of the baseband signal processing module 7. The output end of the baseband signal processing module 7 is connected to the central processor 8.

[0036] The SIP chip of the present invention adopts the above architecture, which significantly saves the product design area, and enables the chip to be used in both single-antenna full-frequency positioning scenarios and dual-antenna triple-frequency positioning and orientation scenarios.

[0037] As Figure 4 shown, when the SIP chip is used in a single-antenna full-frequency positioning scenario, the first input port 1 is connected to the single antenna, the second input port 2 and the third input port 3 are electrically connected outside the SIP chip, and the central processor 8 configures the frequency band of the third receiving channel 63 as the first configured frequency band. The duplexer 5 separates the satellite navigation signal received by the single antenna into radio frequency signals of the first configured frequency band, the third configured frequency band, and the fourth configured frequency band, and inputs the radio frequency signal of the third configured frequency band into the radio frequency signal processing module 6 through the first output end of the duplexer 5 and the first receiving channel 61; inputs the radio frequency signal of the fourth configured frequency band into the radio frequency signal processing module 6 through the second output end of the duplexer 5 and the second receiving channel 62; inputs the radio frequency signal of the first configured frequency band into the radio frequency signal processing module 6 through the third output end of the duplexer 5, the second input port 2, the third input port 3, and the third receiving channel 63, thereby realizing single-antenna full-frequency positioning.

[0038] As Figure 5 shown, when the SIP chip is used in a dual-antenna triple-frequency positioning and orientation scenario, the first input port 1 is connected to the first antenna, a duplexer can be set outside the third input port 3 and the fourth input port 4 and connected to the two output ends of the duplexer respectively, and the central processor 8 configures the frequency band of the third receiving channel 63 as the second configured frequency band, and the second input port 2 is not connected to the first antenna and the second antenna; wherein, the input end of the duplexer is connected to the second antenna, and the frequency bands of the first configured frequency band and the second configured frequency band are different.

[0039] The duplexer 5 separates the satellite navigation signal received by the first antenna into radio frequency signals of the first configured frequency band, the third configured frequency band, and the fourth configured frequency band, and inputs the radio frequency signal of the third configured frequency band into the radio frequency signal processing module 6 through the first output end of the duplexer 5 and the first receiving channel 61; inputs the radio frequency signal of the fourth configured frequency band into the radio frequency signal processing module 6 through the second output end of the duplexer 5 and the second receiving channel 62; discards the radio frequency signal of the first configured frequency band output from the third output end of the duplexer 5; the duplexer outside the chip separates the satellite navigation signal received by the second antenna into radio frequency signals of the third configured frequency band and the fourth configured frequency band, and inputs the radio frequency signal of the third configured frequency band into the radio frequency signal processing module 6 through the third input port 3 and the third receiving channel 63, and inputs the radio frequency signal of the fourth configured frequency band into the radio frequency signal processing module 6 through the fourth input port 4 and the fourth receiving channel 64, thereby realizing dual-antenna full-frequency positioning and orientation.

[0040] In an embodiment of the present invention, the diplexer 5 may specifically adopt a Tri-Saw diplexer. The Tri-Saw diplexer utilizes the characteristics of SAW devices to filter and separate different frequency signals by exciting and propagating surface acoustic waves on the surface of piezoelectric materials. It generally includes three SAW chips and some passive SMT (Surface Mount Technology) devices. Each SAW chip is designed to have good filtering performance for signals in a specific frequency range. Through reasonable layout and connection, the three filters with different frequencies are combined together to form the structure of the diplexer 5, so as to extract the signals in three different frequency bands from the input signal respectively, or synthesize the signals in three different frequency bands into one signal for output. The Tri-Saw diplexer has characteristics such as high selectivity, high temperature stability, small size, and high power handling capacity.

[0041] The duplexer may specifically adopt a Dual-Saw duplexer. The Dual-Saw duplexer, namely the dual surface acoustic wave duplexer, consists of two band-pass filters. Utilizing the characteristics of surface acoustic wave propagation on the surface of piezoelectric materials, it realizes the separation and synthesis of transmitted signals and received signals. By optimizing impedance matching and frequency selectivity, signal reflection is reduced, interference is avoided, and the two-way nature of communication is ensured. The Dual-Saw duplexer has characteristics such as high isolation, low insertion loss, good frequency selectivity, high temperature stability, small volume, and light weight.

[0042] In an embodiment of the present invention, the central processor 8 configures the frequency band of the first receiving channel 61 as the third configured frequency band, and configures the frequency band of the second receiving channel 62 as the fourth configured frequency band. Among them, the third configured frequency band is 1559.052 MHz to 1605.886 MHz, and the fourth configured frequency band is 1166.220 MHz to 1237.830 MHz.

[0043] The satellite navigation signal frequency bands are mainly distributed in the following three regions: The LF region, with a frequency range of 1166.220 MHz to 1283.865 MHz; The MF region, with a frequency range of 1530.000 MHz to 1605.886 MHz; The HF region, with a frequency range of 2483.590 MHz to 2499.910 MHz.

[0044] Among them, the LF region includes the LFL band and the LFH band. The frequency range of the LFL band is 1166.220 MHz to 1237.830 MHz, and the frequency range of the LFH band is 1237.830 MHz to 1283.865 MHz. The frequency range of the MFH band in the MF region is 1559.052 MHz to 1605.886 MHz.

[0045] By configuring the frequency band of the first receiving channel 61 as the third configured frequency band, i.e., the MFH frequency band, and the frequency band of the second receiving channel 62 as the fourth configured frequency band, i.e., the LFL frequency band, the mutual interference between channels can be reduced, the purity and stability of signal reception of each channel can be ensured, and the overall performance of the receiving system can be improved; signals of multiple satellite navigation systems in different frequency bands can be received simultaneously, realizing multi-system compatibility and enhancing the accuracy and reliability of positioning.

[0046] In an embodiment of the present invention, when the SIP chip is used in a single-antenna full-frequency positioning scenario, the local oscillator frequency corresponding to the first receiving channel 61 is configured as half of the sum of the minimum frequency and the maximum frequency of the third configured frequency band; the local oscillator frequency corresponding to the second receiving channel 62 is configured as half of the sum of the minimum frequency and the maximum frequency of the fourth configured frequency band; the local oscillator frequency corresponding to the third receiving channel 63 is configured as half of the sum of the minimum frequency and the maximum frequency of the first configured frequency band.

[0047] Specifically, when the SIP chip is used in a single-antenna full-frequency positioning scenario: The local oscillator frequency corresponding to the first receiving channel 61 f MFH,L0 can be .

[0048] The local oscillator frequency corresponding to the second receiving channel 62 f LFL,L0 can be .

[0049] The local oscillator frequency corresponding to the third receiving channel 63 f LFH,L0 can be .

[0050] In an embodiment of the present invention, when the SIP chip is used in a single-antenna full-frequency positioning scenario, the first configured frequency band is 1237.830 MHz to 1283.865 MHz, that is, the frequency band of the third receiving channel 63 is configured as the LFH frequency band. The fourth receiving channel 64 is idle. That is to say, when implementing the single-antenna receiving scheme using the SIP chip provided by the embodiment of the present invention, only the three output ends of the diplexer 5 need to be correspondingly connected to the three receiving channels of the radio frequency signal processing module 6. Compared with the single-antenna separation scheme, at least 3 radio frequency front-end devices can be reduced, and the radio frequency front-end area can be reduced by more than 60%. Using the SIP chip provided by the embodiment of the present invention can greatly save the design area and the number of radio frequency front-end devices, and the connection is convenient.

[0051] It should be noted that in the single-antenna full-frequency positioning scenario, according to the characteristics of satellite navigation signals, the radio frequency signals received by the single antenna can be separated into signals in the following three frequency bands: 1559.052 MHz to 1605.886 MHz, 1237.830 MHz to 1283.865 MHz, and 1166.220 MHz to 1237.830 MHz, so as to achieve full-frequency point coverage, and further realize the single-antenna full-frequency positioning function.

[0052] In the embodiment of the present invention, when the SIP chip is used in the single-antenna full-frequency positioning scenario, the supported global satellite navigation systems and signals include: The B1I, B1C, B2I, B2a, B2b, and B3I signals of the Beidou satellite navigation system, the L1CA, L1C, L2C, and L5 signals of the Global Positioning System, the G1 and G2 signals of the GLONASS global satellite navigation system, the E1, E5a, E5b, and E6 signals of the Galileo satellite navigation system, the L1CA, L1C, L1S, L5, and L6 signals of the quasi-zenith satellite system, the L1 and L5 signals of the Indian Regional Navigation Satellite System, and the L1 signal of the satellite augmentation system. These signals from different satellite navigation systems are mainly used for positioning and navigation, and facilitate multi-system fusion applications, improving positioning accuracy and reliability, and promoting collaborative work between different systems.

[0053] In the embodiment of the present invention, when the SIP chip is used in the dual-antenna three-frequency positioning and orientation scenario, the local oscillator frequency corresponding to the first receiving channel 61 is configured as half of the sum of the minimum frequency and the maximum frequency of the third configured frequency band; the local oscillator frequency corresponding to the second receiving channel 62 is configured as half of the sum of the minimum frequency and the maximum frequency of the fourth configured frequency band; the local oscillator frequency corresponding to the third receiving channel 63 is configured as half of the sum of the minimum frequency and the maximum frequency of the second configured frequency band; the local oscillator frequency corresponding to the fourth receiving channel 64 is configured as half of the sum of the minimum frequency and the maximum frequency of the fourth configured frequency band. Among them, the second configured frequency band is the same as the third configured frequency band.

[0054] Specifically, when the SIP chip is used in the dual-antenna three-frequency positioning and orientation scenario: The local oscillator frequencies corresponding to the first receiving channel 61 and the third receiving channel 63 f MFH,L0 Can both be: .

[0055] The local oscillator frequencies corresponding to the second receiving channel 62 and the fourth receiving channel 64 f LFL,L0 Can both be: .

[0056] In the embodiment of the present invention, when the SIP chip is used in a dual-antenna triple-band positioning and orientation scenario, the second input port 2 is idle, and the second configured frequency band is 1559.052 MHz to 1605.886 MHz, that is, the MFH band. That is to say, when implementing the dual-antenna reception scheme using the SIP chip provided in the embodiment of the present invention, only one signal needs to be correspondingly input to two receiving channels of the radio frequency signal processing module 6 through two output ends of the duplexer 5, and the other signal needs to be sequentially input to the other two receiving channels of the radio frequency signal processing module 6 through two output ends of an external duplexer and two radio frequency signal output ports. Compared with the single-antenna separation scheme, at least 4 radio frequency front-end devices can be reduced, and the radio frequency front-end area can be reduced by more than 70%. Using the SIP chip provided in the embodiment of the present invention can greatly save the design area and the number of radio frequency front-end devices, and the connection is convenient.

[0057] It should be noted that in the dual-antenna triple-band positioning and orientation scenario, according to the characteristics of satellite navigation signals, the radio frequency signals received by the dual antennas can be separated into signals in the following two frequency bands: 1559.052 MHz to 1605.886 MHz and 1237.830 MHz to 1283.865 MHz, so as to achieve coverage of the L1, L2, and L5 three frequency bands in the corresponding GNSS system, and further achieve the triple-band high-precision positioning and orientation function of the entire GNSS system.

[0058] In the embodiment of the present invention, when the SIP chip is used in a dual-antenna triple-band positioning and orientation scenario, the supported global satellite navigation systems and signals include: The B1I, B1C, B2I, B2a, and B2b signals of the Beidou satellite navigation system, the L1CA, L1C, L2C, and L5 signals of the Global Positioning System, the G1 signal of the GLONASS global satellite navigation system, the E1, E5a, and E5b signals of the Galileo satellite navigation system, the L1CA, L1C, L1S, and L5 signals of the Quasi-Zenith Satellite System, the L1 and L5 signals of the Indian Regional Navigation Satellite System, and the L1 signal of the Satellite Based Augmentation System.

[0059] The SIP chip provided in the embodiment of the present invention highly integrates a radio frequency front end, a signal processing module, a central processor 8, etc., greatly reducing the volume and weight of the chip.

[0060] In modern electronic devices such as smartphones and portable wireless devices where space resources are extremely precious, this miniaturized chip can free up more space for other components, contributing to the thin and light design and miniaturization of the devices. Additionally, since multiple functional modules are integrated within the same package, the connection distance between the functional modules is significantly shortened, and the signal transmission path becomes shorter, thereby effectively reducing the loss and interference during signal transmission and improving the stability and speed of signal transmission. This enables the device using this SIP chip to accurately and quickly process the received signals.

[0061] An embodiment of the present invention also provides a receiver for a satellite navigation system, which includes the above-mentioned SIP chip and a single antenna. The single antenna is connected to the first input port 1 of the SIP chip, and the second input port 2 is connected to the third input port 3 outside the SIP chip.

[0062] Among them, the single antenna is used to receive satellite radio frequency signals and convert them into electrical signals, providing a basis for subsequent signal processing. With the advantages of system-in-package of this SIP chip, it integrates multiple functional modules and has powerful signal processing capabilities.

[0063] When the single antenna receives satellite radio frequency signals and converts them into electrical signals, these signals are transmitted through the connection line to the first input port 1 of the SIP chip. The radio frequency signal processing module 6 inside the SIP chip performs preliminary processing on the input radio frequency signals, including operations such as amplification and filtering of the radio frequency signals. Since satellite signals are subject to various interferences and attenuations during transmission, these processing steps of the radio frequency signal processing module 6 can effectively improve the quality and intensity of the signals, making them more suitable for subsequent processing.

[0064] The baseband signal processing module 7 inside the SIP chip receives and processes the signals processed by the radio frequency signal processing module 6, including operations such as signal acquisition, tracking, and demodulation of the message. When the signal input to the baseband signal processing module 7 is an analog signal, ADC sampling processing is also required.

[0065] The central processor 8 inside the SIP chip is used to schedule and configure the baseband signal processing module 7, and at the same time perform positioning, speed measurement, and time synchronization processing, etc. according to the observed quantities reported by the baseband signal processing module 7.

[0066] An embodiment of the present invention also provides another receiver for a satellite navigation system, which includes the above-mentioned SIP chip, a duplexer, a first antenna, and a second antenna. The first input port 1 is connected to the first antenna, the input end of the duplexer is connected to the second antenna, and the two output ends of the duplexer are respectively connected to the third input port 3 and the fourth input port 4.

[0067] Among them, both the first antenna and the second antenna are used to receive satellite radio frequency signals and convert the satellite radio frequency signals into electrical signals, providing a basis for subsequent signal processing. With the advantages of system-level packaging, this SIP chip integrates a variety of functional modules and has powerful signal processing capabilities.

[0068] The satellite radio frequency signal received by the first antenna is frequency-divided into signals in two frequency bands, MFH and LFL, by a duplexer inside the SIP chip, and the satellite radio frequency signal received by the second antenna is frequency-divided into signals in two frequency bands, MFH and LFL, by a diplexer outside the SIP chip.

[0069] The radio frequency signal processing module 6 inside the SIP chip performs preliminary processing on the two input signal groups, including operations such as amplifying and filtering the radio frequency signals. Since satellite signals are subject to various interferences and attenuations during transmission, these processing steps of the radio frequency signal processing module 6 can effectively improve the quality and intensity of the signals, making them more suitable for subsequent processing.

[0070] The baseband signal processing module 7 inside the SIP chip performs reception processing on the signals processed by the radio frequency signal processing module 6, including operations such as signal capture, tracking, and demodulation of telegrams. When the input signal to the baseband signal processing module 7 is an analog signal, ADC sampling processing is also required.

[0071] The central processor 8 inside the SIP chip is used to schedule and configure the baseband signal processing module 7, and at the same time perform positioning, speed measurement, and time synchronization processing, etc., according to the observed quantities reported by the baseband signal processing module 7.

[0072] The embodiment of the present invention also provides a receiver for a satellite navigation system, which includes a first antenna, a second antenna, a diplexer, a radio frequency switch, and the above-mentioned SIP chip. The radio frequency switch can selectively connect the second input port 2 and the third input port 3, or connect the third input port 3 and an output end of the diplexer according to the need to implement the single-antenna full-frequency positioning function or the dual-antenna triple-frequency positioning and orientation function.

[0073] Specifically, when implementing the single-antenna full-frequency positioning function, the first antenna is connected to the first input port 1, and the second input port 2 is externally connected to the third input port 3 through the radio frequency switch.

[0074] The diplexer separates the satellite navigation signals received by the first antenna to obtain radio frequency signals in the MFH frequency band, LFL frequency band, and LFH frequency band. The radio frequency signals in the MFH frequency band are input into the radio frequency signal processing module 6 through the first output terminal of the diplexer and the first receiving channel 61; the radio frequency signals in the LFL frequency band are input into the radio frequency signal processing module 6 through the second output terminal of the diplexer and the second receiving channel 62; the radio frequency signals in the LFH frequency band are input into the radio frequency signal processing module 6 through the third output terminal of the diplexer, the second input port 2, the third input port 3, and the third receiving channel 63. The radio frequency signal processing module 6 processes the received radio frequency signals, thereby realizing single-antenna full-frequency positioning.

[0075] When realizing the dual-antenna triple-frequency positioning and orientation function, the first antenna is connected to the first input port 1, the second antenna is connected to the input terminal of the duplexer, one output terminal of the duplexer is connected to the third input port 3 through a radio frequency switch, and the other output terminal of the duplexer is connected to the fourth input port 4.

[0076] The diplexer separates the satellite navigation signals received by the first antenna to obtain radio frequency signals in the MFH frequency band, LFL frequency band, and LFH frequency band. The radio frequency signals in the MFH frequency band are input into the radio frequency signal processing module through the first output terminal of the diplexer and the first receiving channel; the radio frequency signals in the LFL frequency band are input into the radio frequency signal processing module through the second output terminal of the diplexer and the second receiving channel; the radio frequency signals in the LFH frequency band are discarded without subsequent transmission and processing.

[0077] The duplexer separates the satellite navigation signals received by the second antenna to obtain radio frequency signals in the MFH frequency band and LFL frequency band. The radio frequency signals in the MFH frequency band are input into the radio frequency signal processing module through the first output terminal of the duplexer, the third input port 3, and the fourth receiving channel; the radio frequency signals in the LFL frequency band are input into the radio frequency signal processing module through the second output terminal of the duplexer, the fourth radio frequency input port, and the fourth receiving channel. The radio frequency signal processing module processes the received radio frequency signals, thereby realizing dual-antenna triple-frequency positioning and orientation.

[0078] By setting the radio frequency switch, the third input port 3 can be selected to connect to the second input port 2 or the duplexer, and thus the single-antenna full-frequency positioning function and the dual-antenna triple-frequency positioning and orientation function can be switched using two antennas. Specifically, when realizing the dual-antenna triple-frequency positioning and orientation function, the antennas used for realizing the single-antenna full-frequency positioning function can be reused.

[0079] The receiver of the satellite navigation system can meet the requirements of two scenarios, namely single-antenna full-frequency positioning and dual-antenna triple-frequency positioning and orientation, by using two antennas and a SIP chip, thereby reducing the hardware cost and shrinking the volume and weight of the device. At the same time, the reduction in the number of antennas can simplify the system design complexity and reduce the power consumption and the difficulty of electromagnetic compatibility design.

[0080] An embodiment of the present invention further provides an electronic device, which includes the receiver of the satellite navigation system as described above.

[0081] Among them, the electronic device can be professional-level products such as communication base stations, drones, robots, and intelligent driving terminals, or consumer-level products such as smart phones, smart watches, tablet computers, and navigators.

[0082] Those skilled in the art can understand that, on the premise of no conflict, the above preferred solutions can be freely combined and superimposed.

[0083] It should be understood that the above embodiments are merely exemplary and not restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions made by those skilled in the art to the above details will be included within the scope of the claims of the present invention.

Claims

1. A SIP chip, characterized in that, It can be used in single-antenna full-frequency positioning scenarios and dual-antenna triple-frequency positioning and orientation scenarios. The SIP chip has a first input port, a second input port, a third input port, and a fourth input port, and includes a diplexer, a radio frequency signal processing module, a baseband signal processing module, and a central processor. The first input port is connected to the input end of the diplexer. The first output end and the second output end of the diplexer are respectively connected to the first receiving channel and the second receiving channel of the radio frequency signal processing module, and the third output end of the diplexer is connected to the second input port. The third input port is connected to the third receiving channel of the radio frequency signal processing module, and the fourth input port is connected to the fourth receiving channel of the radio frequency signal processing module. The output end of the radio frequency signal processing module is connected to the input end of the baseband signal processing module, and the output end of the baseband signal processing module is connected to the central processor.

2. The SIP chip according to claim 1, wherein The central processor configures the frequency band of the first receiving channel as the third configured frequency band, and the central processor configures the frequency band of the second receiving channel as the fourth configured frequency band. The third configured frequency band is 1559.052 MHz to 1605.886 MHz, and the fourth configured frequency band is 1166.220 MHz to 1237.830 MHz.

3. The SIP chip according to claim 2, characterized in that, When the SIP chip is used in a single-antenna full-frequency positioning scenario, the local oscillator frequency corresponding to the first receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the third configured frequency band; the local oscillator frequency corresponding to the second receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the fourth configured frequency band. The central processor configures the frequency band of the third receiving channel as the first configured frequency band, and the local oscillator frequency corresponding to the third receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the first configured frequency band.

4. The SIP chip according to claim 3, wherein, When the SIP chip is used in a single-antenna full-frequency positioning scenario, the first configured frequency band is 1237.830 MHz to 1283.865 MHz, and the fourth receiving channel is idle.

5. The SIP chip according to any one of claims 1-4, characterized in that When the SIP chip is used in a single-antenna full-frequency positioning scenario, the supported global navigation satellite 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 navigation satellite 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 Based Augmentation System.

6. The SIP chip according to claim 2, wherein, When the SIP chip is used in a dual-antenna triple-frequency positioning and orientation scenario, the local oscillator frequency corresponding to the first receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the third configured frequency band; the local oscillator frequency corresponding to the second receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the fourth configured frequency band. The central processing unit configures the frequency band of the third receiving channel as a second configured frequency band, and the local oscillator frequency corresponding to the third receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the second configured frequency band; the local oscillator frequency corresponding to the fourth receiving channel is configured as half of the sum of the minimum frequency and the maximum frequency of the fourth configured frequency band; wherein, the second configured frequency band is the same as the third configured frequency band.

7. The SIP chip according to claim 6, characterized in that, When the SIP chip is used in a dual-antenna triple-frequency positioning and orientation scenario, the second input port is idle, and the second configured frequency band is 1559.052 MHz to 1605.886 MHz.

8. The SIP chip according to claim 1 or 2 or 6 or 7, characterized in that, When the SIP chip is used in a dual-antenna triple-frequency positioning and orientation scenario, the supported global satellite navigation systems and signals include: The B1I, B1C, B2I, B2a, and B2b signals of the Beidou satellite navigation system, the L1CA, L1C, L2C, and L5 signals of the Global Positioning System, the G1 signal of the GLONASS global satellite navigation system, the E1, E5a, and E5b signals of the Galileo satellite navigation system, the L1CA, L1C, L1S, and L5 signals of the Quasi-Zenith Satellite System, the L1 and L5 signals of the Indian Regional Navigation Satellite System, and the L1 signal of the Satellite Based Augmentation System.

9. A receiver of a satellite navigation system, characterized in that, It includes a single antenna and the SIP chip according to any one of claims 1-8, the single antenna is connected to the first input port of the SIP chip, and the second input port and the third input port are connected outside the SIP chip.

10. A receiver of a satellite navigation system, characterized in that, It includes a first antenna, a second antenna, a duplexer, and the SIP chip according to any one of claims 1-8, the first antenna is connected to the first 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 input port and the fourth input port.

11. A receiver of a satellite navigation system, characterized in that, It includes a first antenna, a second antenna, a duplexer, a radio frequency switch, and the SIP chip according to any one of claims 1-8; When implementing the single-antenna full-frequency positioning function, the first antenna is connected to the first input port, and the second input port is connected to the third input port outside the chip through the radio frequency switch; When implementing the dual-antenna triple-frequency positioning and orientation function, the first antenna is connected to the first 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 input port through the radio frequency switch, and the other output end of the duplexer is connected to the fourth input port.

12. An electronic device, characterized in that, It includes a receiver of the satellite navigation system according to claim 9 or 10 or 11.

Images