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This letter proposes a universal discrete-time recurrence (UDR) method to predict the response performance of Geiger-mode avalanche photodiodes (GM-APDs), where performance prediction for a free-running GM-APD is realized beyond the gate-limit assumption for the first time. The dead time effect is summarized as the discrete-time correlation law, and the afterpulsing is first incorporated in the performance...
This paper presents a phase compensation method for high dynamic target echoes, of which the echo phase is not linear but polynomial. Restricted by minimum entropy criterion, coefficients of each order of the echo phase are estimated and utilized to compensate the nonlinearity of the phase. Then the Doppler frequency estimation with higher accuracy can be gained by FFT or other frequency estimation...
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