Design & development of multi-mode integrated timing device

A multi-mode combined timing device was designed based on multi-scale data fusion theory, which can output the time frequency signal with higher precision by combining the GPS, GLONAS and Beidou timing signals. Firstly, the GPS, GLONAS and Beidou timing signals are decomposed respectively in different wavelet scales. Secondly, the wavelet coefficients of these signals in the same scale are synthesized with wavelet weighting method scale by scale. Thirdly, inverse wavelet transform is used to reconstruct the signal that represents the timescale. The new timescale is in step with UTC theoretically. Test result shows that after disciplining the local oscillators, the frequency stability of the device reaches to 10-12, which is higher than that of the single-mode device by one order of magnitude.