Allystar low power/small chip size dual-frequency RTK solution

The lowest power and smallest size, dual-frequency GNSS SoC chip with embedded Real Time Kinematic (RTK) solution available on the market developed by Allystar is introduced in this paper. RTK engine performance is evaluated using GPS L1/L2C and BeiDou B1I/B2I and alternatively using GPS L1/L5 and Galileo E1/E5a signals. It is shown that having dual-frequency observations will provide significant benefits over single-frequency RTK in terms of reliability, fixing rate and accuracy. RTK is tested in both static and kinematic environments, under high-multipath and signal blockage conditions. Results are obtained using RTK engine implemented on a GNSS chip with - only 39 mA current draw at 3.3V. In addition, future development is discussed.