modulation is a proven method to realize high-resolution A/D converters. A particularly efficient way to implement such a modulator uses double-sampling where the sampling frequency is twice the master-clock frequency. Unfortunately path mismatch between both sampling branches causes a part of the quantisation noise to fold from the Nyquist frequency back in the signal band. This degrades the p...

Is faster or stronger sniffing important for the olfactory system? Odorant molecules are captured by sniffing. The features of sniffing constrain both the temporality and intensity of the input to the olfactory structures. In this context, it is clear that variations in both the sniff frequency and flow rate have a major impact on the activation of olfactory structures. However, the question of...

background: this study aimed to assess the relationship between meal frequency with mental distress and violent behavior among a nationally representative sample of iranian children and adolescents. materials and methods: the participants of this national study were 14,880 iranian students with 6 to 18 years of age. they were selected from urban and rural regions of iran by multi-stage cluster ...

Analog-to-digital converters (ADC’s) are ubiquitous, critical components of software radio and other signal processing systems. This paper surveys the state-of-the-art of ADC’s, including experimental converters and commercially available parts. The distribution of resolution versus sampling rate provides insight into ADC performance limitations. At sampling rates below 2 million samples per se...

This paper presents a multi-rate wideband speech coder with bit rates from 8 to 32 kb/s. The coder uses a splitband approach, where the input signal, sampled at 16 kHz, is split into two equal frequency bands from 0-4 kHz and 4-8 kHz, each of which is decimated to an 8 kHz sampling rate. The lower band is coded using the Adaptive Multi-rate (AMR) family of high-quality narrowband speech coders,...

We present a sensor network based eavesdropping system, SensorEar, which demonstrates a serious threat to an individual’s privacy. The small size, long battery lifetimes and easy deployment enable the use of sensor networks in malicious ways. Our system comprises motes which record speech, compress the data and transmit it over a multi-hop network in real time. After noise reduction, we are abl...

Multi-Coset (MC) sampling is a well established, practically feasible scheme for sampling multiband analog signals below the Nyquist rate. MC sampling has gained renewed interest in the Compressive Sensing (CS) community, due partly to the fact that in the frequency domain, MC sampling bears a strong resemblance to other sub-Nyquist CS acquisition protocols. In this paper, we consider MC sampli...

We address the problem of FIR equalizer filter design for multiple-input multiple-output (MIMO) linear time-invariant channels with uniform sampling at the channel outputs. This scheme encompasses Papoulis’ generalized sampling and several nonuniform sampling schemes as special cases. The input signals are modeled as either continuous-time or discrete-time multi-band input signals, with differe...