This paper presents a bandwidth-eecient, power-limited still image transmission system based on subband coding and 64-QAM. A new optimization procedure, based on the simulated annealing algorithm, is used to optimize the map-pings between quantized subband samples and the modulation signal constellation. The optimization criterion is the mean square error between the transmitted and the reconst...

This report presents a theory of quantized systems in support of predictive filtering based on a process called "quantization" to reduce state update transmission. A quantized system is a system with input and output quantizers. Quantization, which generates state updates only at quantum level crossings, abstracts a sender model into a DEVS (Discrete Event System Specification) representation. ...

Time-divergence in linear and nonlinear classical response functions can be removed by taking a phase-space average within the quantized uncertainty volume O(hn) around the microcanonical energy surface. For a quasiperiodic system, the replacement of the microcanonical distribution density in the classical response function with the quantized uniform distribution density results in agreement of...

Limited capacity of communication channels has brought to the attention of many researchers the analysis of control systems subject to a quantized input set. In some fundamental cases such systems can be reduced to Quantized Control System of type x = x+u, where the u takes values in a set of 2m + 1 integer numbers, symmetric with respect to 0. In this paper we consider this type systems and an...

A state feedback with finitely many quantization levels yields only the so called practical stabilization, namely the convergence of any initial state belonging to a bigger bounded region into another smaller target region of the state space. The ratio between the measure of the starting region and the target region is called contraction of the closed loop system. In the analysis of the perform...

In this paper, we propose a high capacity dataembedding system in DCT domain and review the existing high capacity data embedding systems both in spatial domain as well as transform domain. The embedding algorithm is based on the quantized projection embedding method with some enhancement to achieve high embedding rates. The embedding is done on the quantized DCT coefficients using the concept ...

For free field theories associated with BRST first-quantized gauge systems, we identify auxiliary fields and pure gauge variables already on the first-quantized level as the fields associated with algebraically contractible pairs for the BRST operator. Locality of the field theory is taken into account by separating the space–time degrees of freedom from the internal ones. A standard extension ...

We consider a cell-free Massive multiple-input multiple-output (MIMO) system and investigate the system performance for the case when the quantized version of the estimated channel and the quantized received signal are available at the central processing unit (CPU), and the case when only the quantized version of the combined signal with maximum ratio combining (MRC) detector is available at th...

The spin Hall effect in a two-dimensional electron system on honeycomb lattice with both intrinsic and Rashba spin-orbit couplings is studied numerically. Integer quantized spin Hall conductance is obtained at the zero Rashba coupling limit when electron Fermi energy lies in the energy gap created by the intrinsic spin-orbit coupling, in agreement with recent theoretical prediction. While nonze...

Limited capacity of communication channels has brought to the attention of many researchers the analysis of control systems subject to a quantized input set. In some fundamental cases such systems can be reduced to quantized control system of type x+ = x + u, where the u takes values in a set of 2m + 1 integer numbers, symmetric with respect to 0. In this paper we consider these types of system...