Built-in single Beidou high-precision positioning module of mobile terminal

Abstract

The utility model discloses a built-in single Beidou high-precision positioning module of a mobile terminal, which comprises a Beidou special-purpose antenna unit, a radio frequency front-end processing unit, a radio frequency front-end processing unit, a radio frequency front-end processing unit, a radio frequency front-end processing unit and a radio frequency front-end processing unit, wherein the Beidou special-purpose antenna unit adopts a right-handed circular polarization microstrip antenna structure and is integrated inside the mobile terminal for receiving Beidou satellite signals; comprising a low noise amplifier, a multi-frequency-point filter and an analog-to-digital conversion module, the multi-frequency-point filter supports signal separation and anti-interference processing of Beidou B1, B2 and B3 frequency bands, a baseband processing unit, a built-in single Beidou signal demodulation chip, supports multi-frequency-point joint calculation of a Beidou third satellite, and integrates an adaptive anti-multipath interference algorithm and a power management unit, and the analog-to-digital conversion module is connected with the baseband processing unit. A dynamic voltage regulation technology is adopted, power supply voltage is switched according to a positioning mode, and a dormant state is entered when no positioning requirement exists; according to the utility model, by optimizing a hardware architecture and an algorithm, high-precision, low-power-consumption and miniaturized design is realized.

Description

Technical Field

[0001] This utility model belongs to the field of mobile terminal technology, and in particular relates to a mobile terminal with a built-in single Beidou high-precision positioning module. Background Technology

[0002] Existing mobile terminals mostly employ multi-mode satellite navigation systems (such as GPS + BeiDou + GLONASS). While offering strong compatibility, these systems suffer from issues like signal interference, high power consumption, and hardware redundancy. Especially in complex urban environments, multiple system signals can easily lead to decreased positioning accuracy. Furthermore, traditional BeiDou modules are relatively large, making them difficult to adapt to ultra-thin mobile terminals. In addition, existing BeiDou modules rely on external differential correction modules to achieve high-precision positioning, increasing system complexity and cost. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model proposes a single Beidou high-precision positioning module specifically for mobile terminals. By optimizing the hardware architecture and algorithms, it achieves high precision, low power consumption, and miniaturization.

[0004] This utility model achieves the above objectives through the following technical solution: it includes a dedicated BeiDou antenna unit, which adopts a right-hand circularly polarized microstrip antenna structure and is integrated into the mobile terminal for receiving BeiDou satellite signals;

[0005] The radio frequency front-end processing unit is connected to the antenna unit and includes a low-noise amplifier, a multi-frequency filter and an analog-to-digital conversion module. The multi-frequency filter supports signal separation and anti-interference processing for the BeiDou B1, B2 and B3 frequency bands.

[0006] The baseband processing unit has a built-in single BeiDou signal demodulation chip, supports multi-frequency joint calculation of BeiDou-3 satellites, and integrates an adaptive anti-multipath interference algorithm.

[0007] The power management unit uses dynamic voltage regulation technology to switch the power supply voltage according to the positioning mode, and enters a sleep state when there is no positioning requirement.

[0008] The data interface unit communicates with the mobile terminal's main control chip via SPI or I2C bus;

[0009] The BeiDou high-precision positioning module is integrated into the motherboard of the mobile terminal through embedded packaging, and only supports positioning independently by the BeiDou satellite system.

[0010] Furthermore, the BeiDou dedicated antenna unit adopts a multi-layer ceramic substrate design and is isolated from other radio frequency components of the mobile terminal by a metal shield.

[0011] Furthermore, the baseband processing unit incorporates an anti-interference algorithm including:

[0012] Dynamic noise suppression module based on Kalman filtering;

[0013] Beamforming algorithms suppress non-line-of-sight signals through multi-antenna collaboration;

[0014] Beidou B2b band encrypted signal decoding module.

[0015] Furthermore, in the radio frequency front-end processing unit, the multi-frequency filter adopts a composite filter structure of surface acoustic wave and bulk acoustic wave, with a passband isolation of not less than 40dB.

[0016] Furthermore, the power management unit includes three modes: high-precision mode with a supply voltage of 1.8V; normal mode with a supply voltage of 1.2V; and sleep mode with a supply voltage of 0.6V.

[0017] Furthermore, the BeiDou high-precision positioning module has a built-in BeiDou Satellite-Based Augmentation System (BDSBAS) decoding function, which supports receiving differential correction data through the L-band, achieving a positioning accuracy of centimeter level.

[0018] Furthermore, the data interface unit transmission protocol defines a dedicated set of positioning instructions, including a single cold start instruction, a dynamic high-precision trajectory tracking instruction, and a geofence-based trigger positioning instruction.

[0019] Furthermore, the Beidou high-precision positioning module is packaged using system-in-package (SiP) technology, which stacks the antenna, radio frequency, and baseband chips in three dimensions, with an overall thickness of no more than 1.5mm.

[0020] Beneficial effects: This utility model is reasonably designed and has the following beneficial effects:

[0021] In this utility model solution, the positioning error is reduced compared to the traditional solution by using a single Beidou proprietary design and BDSBAS decoding. The accuracy reaches the centimeter level in complex urban environments. Dynamic power management reduces module power consumption and power consumption in sleep mode, significantly extending the terminal's battery life. The combination of composite filter and anti-multipath algorithm improves positioning stability in dense multipath scenarios. SiP packaging technology greatly reduces the module thickness, meeting the requirements of ultra-thin mobile terminals. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall system of this utility model;

[0023] Figure 2 This is a schematic diagram of the baseband processing unit system of this utility model. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Combination Figures 1 to 2 The mobile terminal shown has a built-in single Beidou high-precision positioning module, including a dedicated Beidou antenna unit. It adopts a right-hand circularly polarized microstrip antenna structure and is integrated into the mobile terminal to receive Beidou satellite signals.

[0026] The radio frequency front-end processing unit, connected to the antenna unit, includes a low-noise amplifier, a multi-frequency filter, and an analog-to-digital conversion module. The multi-frequency filter supports signal separation and anti-interference processing for the BeiDou B1, B2, and B3 frequency bands.

[0027] The baseband processing unit has a built-in single BeiDou signal demodulation chip, supports multi-frequency joint calculation of BeiDou-3 satellites, and integrates an adaptive anti-multipath interference algorithm.

[0028] The power management unit uses dynamic voltage regulation technology to switch the power supply voltage according to the positioning mode, and enters a sleep state when there is no positioning requirement.

[0029] The data interface unit communicates with the mobile terminal's main control chip via SPI or I2C bus;

[0030] The BeiDou high-precision positioning module is integrated into the motherboard of the mobile terminal through embedded packaging, and it only supports positioning independently by the BeiDou satellite system.

[0031] The Beidou dedicated antenna unit adopts a multi-layer ceramic substrate design and is isolated from other radio frequency components of the mobile terminal by a metal shield.

[0032] The baseband processing unit has built-in anti-interference algorithms, including:

[0033] Dynamic noise suppression module based on Kalman filtering;

[0034] Beamforming algorithms suppress non-line-of-sight signals through multi-antenna collaboration;

[0035] Beidou B2b band encrypted signal decoding module.

[0036] In the RF front-end processing unit, the multi-frequency filter adopts a composite filter structure of surface acoustic wave and bulk acoustic wave, with a passband isolation of not less than 40dB.

[0037] The Beidou dedicated antenna unit adopts a right-hand circularly polarized microstrip antenna structure with an antenna size of ≤10mm×10mm×2mm. The signal reception efficiency is improved through a multi-layer ceramic substrate design, and interference from other radio frequency components of the mobile terminal is isolated by a metal shield. The antenna is integrated into the internal edge area of ​​the terminal to avoid the shielding effect of the metal shell on the signal.

[0038] The RF front-end processing unit includes a low-noise amplifier, a multi-frequency filter (supporting B1 / B2 / B3 bands), and an analog-to-digital converter module. The multi-frequency filter adopts a composite structure of SAW (Surface Acoustic Wave) and BAW (Bulk Acoustic Wave), with a passband isolation of ≥40dB, effectively suppressing adjacent channel interference; it supports multi-frequency joint reception of BeiDou-3 satellite signals, improving signal stability in complex environments.

[0039] The baseband processing unit has a built-in single BeiDou signal demodulation chip and integrates an adaptive anti-multipath interference algorithm, including a Kalman filter dynamic noise suppression module to eliminate random noise in dynamic environments in real time; a beamforming algorithm to suppress non-line-of-sight signals through multi-antenna collaboration; a B2b band encrypted signal decoding module to enhance data security; and supports BeiDou Satellite-Based Augmentation System (BDSBAS) decoding, receiving differential correction data through the L-band to achieve centimeter-level positioning without the need for an external differential module.

[0040] The data interface unit communicates with the main control chip via the SPI / I2C bus. The transmission protocol defines a dedicated instruction set, including instructions for single cold start, dynamic trajectory tracking, and geofence-triggered positioning, which improves the flexibility of positioning control.

[0041] Working principle: During use, the module is embedded in the edge area of ​​the motherboard, and the antenna unit faces the non-metallic area on the back of the terminal. After the user turns on the high-precision mode, the module receives differential data through BDSBAS and combines it with B1 / B2 / B3 multi-frequency signals to achieve real-time centimeter-level positioning, which is suitable for AR navigation, precision logistics and other scenarios.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mobile terminal built-in single Beidou high-precision positioning module, characterized in that, It includes a dedicated BeiDou antenna unit, which adopts a right-hand circularly polarized microstrip antenna structure and is integrated into the mobile terminal for receiving BeiDou satellite signals; The radio frequency front-end processing unit is connected to the antenna unit and includes a low-noise amplifier, a multi-frequency filter and an analog-to-digital conversion module. The multi-frequency filter supports signal separation and anti-interference processing for the BeiDou B1, B2 and B3 frequency bands. The baseband processing unit has a built-in single BeiDou signal demodulation chip, supports multi-frequency joint calculation of BeiDou-3 satellites, and integrates an adaptive anti-multipath interference algorithm. The power management unit uses dynamic voltage regulation technology to switch the power supply voltage according to the positioning mode, and enters a sleep state when there is no positioning requirement. The data interface unit communicates with the mobile terminal's main control chip via SPI or I2C bus; The BeiDou high-precision positioning module is integrated into the motherboard of the mobile terminal through embedded packaging, and only supports positioning independently by the BeiDou satellite system.

2. The mobile terminal built-in single Beidou high-precision positioning module according to claim 1, characterized in that: The Beidou dedicated antenna unit adopts a multi-layer ceramic substrate design and is isolated from other radio frequency components of the mobile terminal by a metal shield.

3. The mobile terminal built-in single Beidou high-precision positioning module according to claim 2, characterized in that: The baseband processing unit has a built-in anti-interference algorithm, including: Dynamic noise suppression module based on Kalman filtering; Beamforming algorithms suppress non-line-of-sight signals through multi-antenna collaboration; Beidou B2b band encrypted signal decoding module.

4. The mobile terminal built-in single-Beidou high-precision positioning module according to claim 3, characterized in that: In the radio frequency front-end processing unit, the multi-frequency filter adopts a composite filter structure of surface acoustic wave and bulk acoustic wave, with a passband isolation of not less than 40dB.

5. A mobile terminal with a built-in single Beidou high-precision positioning module according to claim 4, characterized in that: The power management unit includes three modes: high-precision mode with a supply voltage of 1.8V; normal mode with a supply voltage of 1.2V; and sleep mode with a supply voltage of 0.6V.

6. The mobile terminal built-in single-Beidou high-precision positioning module according to claim 5, characterized in that: The BeiDou high-precision positioning module has a built-in BeiDou satellite-based augmentation system decoding function, supports receiving differential correction data through the L-band, and achieves positioning accuracy at the centimeter level.

7. The mobile terminal built-in single-Beidou high-precision positioning module according to claim 6, characterized in that: The data interface unit transmission protocol defines a dedicated set of positioning instructions, including single cold start instructions, dynamic high-precision trajectory tracking instructions, and geofence-based trigger positioning instructions.

8. The mobile terminal built-in single-Beidou high-precision positioning module according to claim 7, characterized in that: The Beidou high-precision positioning module is packaged using system-level packaging technology, which stacks the antenna, radio frequency and baseband chip in three dimensions, with an overall thickness of no more than 1.5mm.

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