Abstract Constraints on the linear growth rate, fσ8, using small scale redshift space distortion measurements have a significant statistical advantage over those made large scales. However, these need to carefully disentangle and non-linear information when interpreting distortions in terms of fσ8. It is particularly important do this given that some previous found deviation from expectation ba...

–High power efficiency is an important requirement in cellular transmitter radios. OFDM systems require very linear transmission because of high peak-to-average-power-ratio (PAPR). However, linear power amplifiers (PA) have very low efficiency. To enhance the power efficiency, non-linear PAs are applied and even forced to work near the saturation point. This generates inevitably huge non-linear...

In this paper, we propose an optimal relay power allocation of an Amplify-and-Forward relay networks with nonlinear power amplifiers. Based on Bussgang Linearization Theory, we depict the non-linear amplifying process into a linear system, which lets analyzing system performance easier. To obtain spatial diversity, we design a complete practical framework of a non-linear distortion aware receiv...

The performance of speech systems such as speaker recognition degrades drastically when there is mismatch between training and testing conditions, caused by non-linear distortion. This paper describes a technique to estimate and correct such non-linear distortion in speech. The focus is on constrained restoration of degraded speech, that is distortion in the test speech is undone relative to th...

This paper introduces a linear programming (LP) technique that performs ratedistortion based optimization for constrained video coding. Given the assumption of piecewise linear and convex rate-distortion functions, LP is used to generate optimal solutions for the minmax problem under VBR buffer constraints. The LP solution for this problem avoids an explicit search for the minimum distortion va...

Quality fluctuation has a major negative effect on subjective video quality. A desirable single-pass frame-level constant-distortion bit allocation scheme is proposed in the paper for smooth video quality throughout the video sequence. The average distortion of all previous coded frames is taken as the target distortion for the current frame. According to the linear rate control algorithm [1][2...

Synthetic aperture radar (SAR) systems are mounted on airplanes and satellites, which have limited downlink and storage capacity, yet SAR image sequences may be produced at rates of several Gbps. Compression is di cult because SAR images contain signi cant highfrequency information, such as terrain boundaries and terrain texture. In assessing the quality of compressed images, peak signal-to-noi...

A distortion risk measure used in finance and insurance is defined as the expected value of potential loss under a scenario probability measure. In this paper, the tail distortion risk measure is introduced to assess tail risks of excess losses modeled by the right tails of loss distributions. The asymptotic linear relation between tail distortion and Value-at-Risk is derived for heavy tailed l...

In the wireless video communication system, transmission distortion, caused by packet transmission errors, is a non-linear time-variant function of video frame statistics, channel condition and system parameters. By modeling the transmission distortion process as output of the random video sequence and channel error processes, the system can be modeled as an equivalent non-linear time-variant s...