Bynav

M21 INS Module

Category： Bynav
Attachment INQUIRY EMAIL

Product Description:

M21 High-precision Combined Navigation Module

Deeply-coupled GNSS/IMU Anti-jamming L-Band

Brief Introduction

The M21 is a high-precision combined navigation module comprising 54 pins and packaged in a LGA. The module incorporates a high-precision measurement engine, navigation engine and functional safety processor. The module is capable of supporting anti-jamming of 65 dBc narrowband, high-performance RTK and deeply-coupled combined navigation solutions, thereby enabling it to function effectively in harsh environments such as those characterised by satellite signal interference and multipath. It is able to provide continuous, real-time and reliable high-precision position and attitude data, which makes it suitable for use in automated driving, drones, precision agriculture, surveying, mapping and other applications.

Technological Advantage

• Deeply-coupled Combined Navigation Algorithm

The device is equipped with a MEMS IMU, which enables the calculation of DR and facilitates the continuous output of high-precision position and velocity data, even in scenarios where the target is briefly occluded. It is compatible with the deeply coupled combined navigation algorithm based on the Bynav Alice SoC, which enhances the quality of GNSS observations. In environments such as urban canyons, its positioning accuracy is 2 to 5 times superior to that of loosely coupled algorithms.

• Full Constellation&Frequency GNSS Signal Solution

The device is equipped with a BDS/GPS/GLONASS/Galileo/QZSS Full Constellation & Frequency high-precision RTK solution. Additionally, the integrated Bynav REAL (Ransac Enhanced Advanced Location) GNSS positioning engine incorporates integrity monitoring, enhancing fault tolerance and fixed solution rate in urban areas. This is particularly beneficial in situations where multipath and interference conditions are present. The result is a more stable and accurate solution.

• High-performance Multiple Interference Suppression

SAIF (Smart Advanced Interference Defense) is a high-performance multiple interference suppression technology with high AD quantization bits. It is built in and capable of handling different interferences, including single-frequency, multitone, sweeping, pulse, and narrowband, with an interference-signal ratio of 65 dBc. SAIF can address common interference signals in complex electromagnetic environments, thereby greatly improving the availability and integrity of high-precision positioning in vehicle scenarios.

• L-Band*, CLAS*, B2b (PPP)* and E6 (HAS)*

The device is capable of receiving L-Band* SBAS signals and provides high-precision positioning in environments where conventional differential services or mobile communication services are unavailable. It supports BeiDou-3 B2b PPP* and E6 HAS* solutions, utilising the four-frequency signals from BeiDou and Galileo to significantly improve PPP convergence speed and enhance the availability of high-precision positioning.

Feature

» Independent Intellectual Property Rights

» Full Constellations and Full Frequency(1507 Channels)

» High-performance Anti-jamming*

» Support Ethernet Port, Embedded SDK Differential Account, SupportgPTP Time Synchronization

» AP Partition Design Ensures Stable and Reliable OTA Upgrades

» Support System Self-check and Fault Diagnosis*

Application

Intelligent Driving	Agriculture

Drone	Intelligent Robot

Performance
Constellation:	GPS, BDS, GLO, GAL, QZSS, NavIC
Number of Channel:	1507
Tracking
L-Band*	3 channels, 1525~1559 MHz
BDS-2	B1I, B2I, B3I
BDS-3	B1I, B1C, B2a, B2b(PPP)
GPS	L1 C/A, L1C*, L2, L5
GLO	G1, G2
GAL	E1, E5a, E5b, E6*
QZSS	L1 C/A, L1C, L2, L5, L6*
NavIC	L5
SBAS*	L1 C/A
Anti-jamming*
Single-frequency, Multitone, Sweeping, Pulse,Narrowband;
Interference-Signal Ratio: 65 dBc
Interface
UART	×4
SPI*	×1
CAN FD	×2
ANT_DETECT	×1
PPS	×1
RMII	×1
Horizontal Positioning Accuracy (RMS)^1,2
Single Point	1.5 m
RTK	1.0 cm + 1 ppm
Vertical Positioning Accuracy (RMS)^1,2
Single Point	2.5 m
RTK	1.5 cm + 1 ppm
Max. Output Rate
GNSS Observation⁹	5 Hz
GNSS Positioning Result⁹	5 Hz
INS Positioning Result	100 Hz
IMU Raw Data	100 Hz
DR Accuracy (2σ)^1,3	0.8 %
Time To First Fix
Cold Start ^3,5	≤ 30 s
Hot Start ^4,5	≤ 5 s
RTK Initialization¹	≤ 5 s
Re-acquisition Time	≤ 1 s
Timing Accuracy (RMS)⁷	≤ 20 ns
Velocity Accuracy⁶	0.03 m/s
RTK Solution Delay	≤ 50 ms

IMU

Gyroscope
Measure Range (° /s)	± 300
Angle Random Walk ( ° /h)	0.5
Bias instability (° /h)	5
Bias (° /s)	0.3
Scale Error	4‰
Cross Coupling Error	1.7‰ (0.1° )
Accelerometer
Measure Range (g)	± 16
Velocity random walk (m/s/ √ h)	0.3
Bias instability (μg)	50
Bias (mg)	5
Scale Error	2‰
Cross Coupling Error	0.9‰ (0.05° )
System Functional Safety*	ASIL B

Mechanical and Electrical
Size	17.0 × 22.0 × 2.75 mm
Package	54 pin LGA
Weight	2 g
Power Consumption⁸	500 mW
Power Supply Range	3.0~3.6 V

Environment and Certification
Operation Temperature¹⁰	-40 ℃ ~ +85 ℃
Storage Temperature¹¹	-55 ℃ ~ +150 ℃
Humidity	95% Non-condensing
Vibration	JESD22-B103
Shock	JESD22-B110
IATF 16949*
ISO 26262 ASIL B*
AEC-Q104*

Note:

1. Typical value. Performance will be affected by GNSS status, satellite position, baseline length, multipath and other interferences;

2. Using a 1 km baseline and a receiver with good antenna performance, without considering possible errors due to antenna phase centre offset.

3. Typical value. There is no almanac, ephemeris and approximate position or time. or time.

4. Typical value. Almanac, ephemeris and approximate position or time will be preserved；

5. -130dBm and more than 12 satellites are available.

6. Open sky without any obstruction, 99%@ static；

7. Optional. RF and antenna bias are not included.
8. Typical value. Antenna and peripheral power not included；
9. 20Hz is supported in special firmware;
10. There is an optional temperature range of -40℃ ~105℃;
11. There is an optional temperature range of -40℃ ~150℃;
* Optional, supported in dedicated firmware.