Two multiplication-free correlators (the hybrid sign and polarity coincidence correlators) are analyzed as fast alternatives to the direct multiply-and-accumulate technique in time delay measurements. Their accuracy limits are given for general signal and noise spectra and their dependence on signal-to-noise ratio (SNR), observation interval, and signal bandwidth is analyzed for a reference case, PC (polarity coincidence) variance has been verified to decrease uniformly with increasing SNR while HS (hybrid sign) variance does not. PC is verified to be a powerful tool if a certain loss in accuracy can be tolerated or recovered by properly enlarging the observation interval
Fast techniques for time delay estimation / Cusani, Roberto. - (1989), pp. 177-180. (Intervento presentato al convegno Proceedings. Electrotechnical Conference Integrating Research, Industry and Education in Energy and Communication Engineering') [10.1109/MELCON.1989.50011].
Fast techniques for time delay estimation
CUSANI, Roberto
1989
Abstract
Two multiplication-free correlators (the hybrid sign and polarity coincidence correlators) are analyzed as fast alternatives to the direct multiply-and-accumulate technique in time delay measurements. Their accuracy limits are given for general signal and noise spectra and their dependence on signal-to-noise ratio (SNR), observation interval, and signal bandwidth is analyzed for a reference case, PC (polarity coincidence) variance has been verified to decrease uniformly with increasing SNR while HS (hybrid sign) variance does not. PC is verified to be a powerful tool if a certain loss in accuracy can be tolerated or recovered by properly enlarging the observation intervalI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
