Application of multi-level α-β-γ filter in velocity measurement

Applying the multi-level α-β-γ filter to smooth the measured value, based on the theory of navigation velocity measurement, can improve the accuracy of measured velocity for navigational receiver. By switching parameters of filter, the problem that traditional and single α-β-γ filter fail to satisfy both smoothing accuracy and convergence rate can be solved. Moreover, this method not only simplifies the theory but also reduces the amount of calculation. Therefore, it is suitable for this method to be used by a high-dynamic navigation receiver in real time. The experimental results have indicated that the expectation is achieved, especially improving smoothing accuracy and convergence rate.