In this paper, we are motivated by the quantization of filter coefficients in the wavelet transform for image compression. First, filter coefficients are quantized in coefficient level which is based on fixed point representation. However, if coefficients are quantized, this change affects filter properties. Thus, a genetic algorithm based approach for filter coefficient quantization preserving...

In this contribution, we investigate a coarsely quantized Multi-User (MU)-Multiple Input Single Output (MISO) downlink communication system, where we assume 1-Bit Digitalto-Analog Converters (DACs) at the Base Station (BS) antennas. First, we analyze the achievable sum rate lower-bound using the Bussgang decomposition. In the presence of the non-linear quantization, our analysis indicates the p...

In this work we report on experiments performed on smooth edge-narrow Hall bars. The magneto-transport properties of intermediate mobility two-dimensional electron systems are investigated and analyzed within the screening theory of the integer quantized Hall effect. We observe a non-monotonic increase of Hall resistance at the low magnetic field ends of the quantized plateaus, known as the ove...

The role of edge states in phenomena like the quantum Hall eeect is well known. In this paper we show how the choice of boundary conditions for a one-particle Schrr odinger equation can give rise to states localized at the edge of the system. We consider both the example of a free particle and the more involved example of a particle in a magnetic eld. In each case, edge states arise from a non-...

In this work we analyze complex scalar fields using a new framework where the object of noncommutativity θ represents independent degrees of freedom. In a first quantized formalism, θ and its canonical momentum πμν are seen as operators living in some Hilbert space. This structure is compatible with the minimal canonical extension of the Doplicher-Fredenhagen-Roberts (DFR) algebra and is invari...

This paper studies the identification of ARMA systemswith coloredmeasurement noises using finite-level quantized observations. Comparedwith the case under colorless noises, this problem ismore challenging. Our approach is to jointly design an adaptive quantizer and a recursive estimator to identify system parameters. Specifically, the quantizer uses the latest estimate to adjust its thresholds,...

This paper describes a high quality, low bit rate (about 2.4 k bits per sec) speech coder which uses adaptive wavelets to model speech. The optimal wavelet parameters which correspond to the speech model that produced a particular sound are obtained using a feed forward neural network. These parameters are then quantized using scalar and Vector Quantization (VQ) techniques to reduce the number ...

Starting from bosonization, we study the operator that commute or commute up-to a total difference with of any quantized screen operator of a free field. We show that if there exists a operator in the form of a sum of two vertex operators which has the simplest correlation functions with the quantized screen operator, namely a function with one pole and one zero, then, the screen operator and t...

We use a semiclassical version of the Nexus paradigm quantum gravity in which vacuum at large scales is dominated by second quantized electromagnetic field to demonstrate that virtual photon can affect geometric evolution Einstein manifolds or Ricci solitons. This phenomenon offers cogent explanation origins astrophysical jets, cosmological constant, and means detecting galactic dark matter.

Line Spectrum Pairs (LSP) are commonly used in speech coding for spectral quantization. Usually, the LSPs are first calculated, and then quantized. When scalar quantization is used, computational saving can be achieved by direct calculation of the quantized LSPs, searching zero-crossings on the grid formed by the values of the quantization tables (quantized-domain search). In a previous publica...