In multicarrier systems, the transmitted timedomain signal exhibits large amplitude peaks. This peak-toaverage power ratio (PAPR) problem complicates the practical use of multicarrier systems: the amplifier used to transmit the signal saturates because of the large peaks and causes non-linear distortion. As this non-linear distortion frustrates severely the detection of the multicarrier signal,...

This article introduces a new non-linear distortion synthesis technique, Split-Sideband Synthesis (SpSB). The technique is based on a variation of three well known distortion techniques, Waveshaping, Singlesideband modulation and Frequency Modulation. The basic technique is outlined and the relationship between these three techniques and SpSB is discussed. A reference implementation is presente...

prove that the tree construction of Fakcharoenphol, Rao, and Talwar [2] can be used to approximate snowflake metrics by trees with expected distortion bounded independently of the size of the metric space. The constant of distortion we derive depends linearly on the dimension of the metric space. We also present an algorithm for building a single tree whose cost is linear in the problem size. A...

To measure an unbiased farm-specific efficiency of individual dairy farmers, a shadow-price profit frontier adjusted for market distortion was applied to a sample of 860 Iranian small intensive dairy farms surveyed in 2005-2006. This measure was then compared with that of unadjusted measure that assumes undistorted market. A multiple general linear model (GLM) technique was applied to the data ...

We make a case that taking the number of bits to code each motion vector into account when estimating motion for video compression results in significantly better performance at low bit rates, using simulation studies on established benchmark videos. First, by modifying a “vanilla” implementation of the H.261 standard, we show that choosing motion vectors explicitly to minimize rate (in a greed...

This paper presents an adaptive algorithm that is considered as a modification to the Block Linear Equalizer which is used with Block Data Transmission Systems. The two main factors that influence the noise performance of the Block Data Transmission System are the distortion introduced by the channel and the block size. The proposed algorithm considerably improves the noise performance and henc...

We introduce a novel continuous surface deformation method which relies on a time-dependent vector field over a triangular mesh. For every time step the piecewise linear vector field is obtained by leastsquares minimization of the metric distortion induced by integration subject to boundary conditions. As an integral part of the approach, we introduce a new measure to describe local metric dist...

We investigate adversarial attacks for autoencoders. We propose a procedure that distorts the input image to mislead the autoencoder in reconstructing a completely different target image. We attack the internal latent representations, attempting to make the adversarial input produce an internal representation as similar as possible as the target’s. We find that autoencoders are much more robust...

Let finite source and reproduction alphabets X and Y and a distortion measure d : X ×Y → [0,∞) be given. We study the minimum asymptotic rate required to describe a source distributed over X within a (given) distortion threshold D at every sample. The problem is hence a min-max problem, and the distortion measure is extended to vectors as follows: for x ∈ X, y ∈ Y, d(x, y) = maxi d(xi, yi). In ...