Product overview
Shanghai Sinan Navigation’s K922 is a high-precision GNSS positioning and heading module intended for precision agriculture, UAVs, and driver testing and training. It combines the company’s proprietary QC7820 system-on-chip with an incorporated inertial measurement unit (IMU), supporting on-chip calculations that combine satellite and inertial navigation. K922 supports signal reception across all GNSS systems and frequency bands and is compatible with RTK, PPP and SPP positioning modes.
The QC7820 at the core of K922 is Shanghai Sinan Navigation’s fourth-generation GNSS navigation and positioning chip, integrating radio-frequency circuitry, power management, baseband processing and a CPU. The chip uses a 22 nm process and includes a dual-core processor with a main frequency of 800 MHz and a maximum of 1.2 GHz. It also supports high-performance floating-point computation and has 1688 channels. These specifications describe the underlying chip within K922’s positioning and heading architecture.
Specifications
| Specification | Value & conditions |
|---|---|
| Manufacturer and model | Shanghai Sinan Navigation K922 high-precision GNSS positioning and heading module |
| Main processor | Proprietary QC7820 system-on-chip |
| Semiconductor process | 22 nm |
| CPU architecture | Built-in dual-core processor |
| Processor frequency | Up to 1.2 GHzMaximum published processor frequency. |
| Processor computation | Supports high-performance floating-point computation |
| Physical integration | Surface-mount design |
| Power and size | Low power consumption and small sizeQualitative manufacturer description. |
| GNSS signal reception | Supports reception across all GNSS systems and frequency bands |
| Supported satellite systems | BDS, GPS, GLONASS, Galileo, QZSS, SBAS and IRNSS |
| Positioning modes | RTK, PPP and SPP |
| Integrated inertial navigation | Integrated IMU with support for on-chip combined navigation calculationsManufacturer describes an incorporated IMU and on-chip processing. |
| Positioning under obstruction | Onboard inertial IMU supports continuous positioning in obstructed environmentsManufacturer claim for obstructed environments. |
| Interference suppression | Suppression of in-band narrowband and multi-tone radio interferenceApplies to narrowband and multi-tone radio interference within the signal frequency band. |
| Positioning accuracy | Accuracy can reach centimeter levelManufacturer states achievable accuracy. |
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