Concept

Group delay and phase delay

Related publications (96)

Conditional Bit Error Rate for an Impulse Radio UWB Channel with Interfering Users

We consider a multi-user impulse radio UWB physical layer in a multipath environment. We propose a fast and efficient method to compute the conditional bit error rate (BER), given some realizations of the channels from source/interferer to destination, and ...

2005

On the optimal density for real-time data gathering of spatio-temporal processes in sensor networks

Martin Vetterli, Razvan Cristescu

We consider sensor networks that measure spatio-temporal correlated processes. An important task in such settings is the reconstruction at a certain node, called the sink, of the data at all points of the field. We consider scenarios where data is time cri ...

IEEE2005

Packetized Media Streaming with Comprehensive Exploitation of Feedback Information

Pascal Frossard, Christophe De Vleeschouwer

This paper addresses the problem of streaming packetized media over a lossy packet network, with sender-driven (re)transmission using acknowledgement feedback. The different transmission scenarios associated to a group of interdependent media data units ar ...

2005

Estimating the Delay and Coloration Effect of the Acoustic Echo Path for Low Complexity Echo Suppression

Christof Faller, Christophe Tournery

Acoustic echoes arise whenever there is acoustic coupling between a loudspeaker and a microphone. A traditional solution for eliminating the undesired echo signal is an acoustic echo canceler (AEC), which identifies the echo path between a loudspeaker and ...

2005

Long optically controlled delays in optical fibers

Luc Thévenaz, Kwang-Yong Song

Optically controlled delay lines in optical fibers are demonstrated by use of the group-velocity control of signal pulses based on stimulated Brillouin scattering. We achieve continuous time delay within the range of 150 ns, much larger than the width of t ...

Optical Society of America2005

Volume holographic grating-based continuously tunable optical filter

Demetri Psaltis, Wei Liu

We propose and demonstrate a widely tunable optical filter, realized by angle tuning a volume holographic grating. The volume holographic grating selectively drops a narrow portion of the signal bandwidth into a fiber while passing through the rest of the ...

2004

Using RASTA in task independent TANDEM feature extraction

John David Scott Dines, Guillermo Aradilla

In this work, we investigate the use of RASTA filter in the TANDEM feature extraction method when trained with a task independent data. RASTA filter removes the linear distortion introduced by the communication channel which is demonstrated in a 18% relat ...

IDIAP2004

Using RASTA in task independent TANDEM feature extraction

John David Scott Dines, Guillermo Aradilla

2004

Delay aspects in Internet telephony

Catherine Boutremans

In this work, we address the transport of high quality voice over the Internet with a particular concern for delays. Transport of interactive audio over IP networks often suffers from packet loss and variations in the network delay (jitter). Forward Error ...

EPFL2003

Spike frequency adaptation and neocortical rhythms

Henry Markram

Spike-frequency adaptation in neocortical pyramidal neurons was examined using the whole cell patch-clamp technique and a phenomenological model of neuronal activity. Noisy current was injected to reproduce the irregular firing typically observed under in ...

2002

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