Error vector magnitude based parameter estimation for digital filter back-propagation mitigating SOA distortions in 16-QAM

An Improved Motion Vector Estimation Approach for Video Error Concealment Based on the Video Scene Analysis

In order to enhance the accuracy of the motion vector (MV) estimation and also reduce the error propagation issue during the estimation, in this paper, a new adaptive error concealment (EC) approach is proposed based on the information extracted from the video scene. In this regard, the motion information of the video scene around the degraded MB is first analyzed to estimate the motion type of...

Digital back-propagation for spectrally efficient WDM 112 Gbit/s PM m-ary QAM transmission.

We report the performance of coherently-detected nine-channel WDM transmission over high dispersion fibers, using polarization multiplexed m-ary quadrature amplitude modulation (m=4, 16, 64, 256) at 112 Gbit/s. Compensation of fiber nonlinearities via digital back-propagation enables up to 10 dB improvement in maximum transmittable power and ~8 dB Qeff improvement which translates to a nine-fol...

Satellite Based Turbo-Coded, Blind-Equalized 4-QAM and 16-QAM Digital Video Broadcasting

The Pan-European Digital Satellite Video Broadcasting (DVB-S) system’s performance is characterized and improved with the aid of turbo coding and multi-level modulation. Specifically, various configurations of blind equalizers and convolutional as well as turbo codecs operating at different code rates were investigated. The standard system’s performance was improved upon replacing the conventio...

16-QAM Photonic Vector Modulator for Gigabit Wireless Links

In this report the use of photonic techniques in the application of high capacity wireless links in the millimeter wave frequency range is addressed. A novel technique called the photonic vector modulation has been proposed, and generation of advanced modulation like 16-QAM upto a capacity of 10 Gb/s in the millimeter wave frequency has been studied and experimentally demonstrated. Several arch...

Pseudoerror Monitor for 16 QAM 140 Mbit/s Digital Radio