55results about How to "Reduce the amount of data collected" patented technology

The invention discloses an FRI sparse sampling core function building method and an FRI sparse sampling core function building circuit. According to the method, the condition that a sampling core needs to meet is determined according to the features of an analog input signal and a subsequent parameter estimation algorithm, a frequency response function of a Fourier series coefficient screening circuit is designed, a performance parameter of the sampling core response function is determined, and a sampling core function is acquired after correction. The circuit is achieved by a Fourier series coefficient screening module and a phase correction module. The Fourier series coefficient screening module adopts a Chebyshev II type lowpass filtering circuit, and the phase correction module adopts all-pass filtering circuit. Signals can be directly sparsely sampled according to the information innovation rate after passing through the sampling core circuit, and original feature parameters can be accurately recovered via a parameter estimation algorithm after sparse data is acquired. The limited innovation rate sparse sampling core provided by the invention is particularly applicable to an FRI sparse sampling system for pulse flow signals, a sampling rate is far lower than a general Nyquist sampling rate, and a data collection amount is greatly reduced.