A novel differential method based on linear fitting is proposed to improve the accuracy of pulse-ranging system. In this method, Peak Points (PPs) traditional echo signal transformed into Positive-Going Zero-Crossing (PGZCPs) signal. Then, we obtained true zero-crossing point by points near PGZCPs. We compared (DMLF) and peak method. The Root Mean Square Error (RMSE) found with our (0.1661 ns) ...

This paper presents a new method of sound source localization based on zero-crossings generated from binaural filter-bank outputs. To detect the sound source direction, in the conventional methods the inter-aural time differences (ITDs) and the inter-aural intensity differences (IIDs) are estimated using the cross-correlations of neuronal firing rates. However, these methods require high comput...

This paper presents a new method of zero-crossing based binaural mask estimation for sound segregation under the condition that multiple sound sources are present simultaneously. The masking is determined by the estimated sound source directions using the spatial cues such as inter-aural time differences (ITDs) and inter-aural intensity differences (IIDs). In the suggested method, the estimatio...

A baseband digital narrow-band FM receiver, called zero-intermediate frequency zero-crossing demodulator (ZIFZCD), has been recently developed. This demodulator may offer low complexity and simple implementation. However, the bit error rate (BER) performance of the ZIFZCD is inferior to that of the limiter-discriminator-integrate-and-dump (LDI) demodulator. In this paper, a simple decision feed...

We consider the zero crossings and positive solutions of scalar nonlinear stochastic Volterra integrodifferential equations of Itô type. In the equations considered, the diffusion coefficient is linear and depends on the current state, and the drift term is a convolution integral which is in some sense mean reverting towards the zero equilibrium. The state dependent restoring force in the integ...

With an increasing need for higher data rates, both wireless applications and data links are demanding higher speed analog-todigital converters (ADC) with medium resolution. In particular, this work will investigate ADC’s with sampling rate up to 10 Gs/s with 6-8 bits of resolution. Time-interleaved converters achieve their high sampling rate by placing several converters in parallel. Each indi...

Zero crossings or extrema of a wavelet transform constitute important signatures for signal analysis with the advantage of great simplicity. In this paper, we introduce a fast frequency-estimation method based on zero-crossing counting in the transform domain of a family of differential spline wavelets. The resolution and order of the vanishing moments of the chosen wavelets have a close relati...

We determined methemoglobin in blood by zero-crossing-point first-derivative spectrophotometry. After lysis of erythrocytes, hemoglobin was converted into oxyhemoglobin and the first derivative spectrum was recorded between 405 and 425 nm. At the exact point where the first-derivative spectrum of oxyhemoglobin was zero ("zero-crossing point"), the first-derivative value of oxyhemoglobin and met...

We address the problem of estimating instantaneous frequency (IF) of a real-valued constant amplitude time-varying sinusoid. Estimation of polynomial IF is formulated using the zero-crossings of the signal. We propose an algorithm to estimate nonpolynomial IF by local approximation using a low-order polynomial, over a short segment of the signal. This involves the choice of window length to min...

This paper addresses the detection and removal of key clicks in the NATO non-native Air Traffic Control database. Key clicks are impulse-like noises generated in Push-to-Talk (PTT) and Voice Operated eXchange (VOX) communications systems. The removal of key clicks can improve the quality of the signal for both listening and machine processing. The detection of key clicks could also assist in ot...