Research has shown that significant degradation in performance can occur even when operating within the limits for carrier frequency and modulation index offsets permitted by the Bluetooth standard. This is even more severe for multi-bit detectors like the matched filter bank receiver, because such errors accumulate across a longer observation interval. This paper details the derivation of a st...

Using simultaneous acquisition from multiple channels of a radio-frequency (RF) coil array, magnetic resonance inverse imaging (InI) achieves functional MRI acquisitions at a rate of 100 ms per whole-brain volume [1]. InI accelerates the scan by leaving out partition encoding steps and reconstructs images by solving under-determined inverse problems using RF coil sensitivity information. Hence,...

The standard ISO 12233 method for the measurement of spatial frequency response (SFR) for digital still cameras and scanners is based on the analysis of slanted-edge image features. The procedure, which applies a form edge-gradient analysis to an estimated edge spread function, requires the automated finding of an edge feature in a digital test image. A frequently-considered (e.g. ISO-13660, -1...

This paper addresses the reconstruction problem of non-stationary signals with missing samples. The reconstruction is achieved by using concentration measures of time-frequency representations in combination with a gradient-based iterative algorithm. As an example of time-frequency representation, the S-method is used in the proposed approach. The sparsity of the transform domain, needed for a ...

In this paper the nano conical shell model is developed based on modified strain gradient theory. The governing equations of the nano truncated conical shell are derived using the FSDT, and the size parameters through modified strain gradient theory have been taken into account. Hamilton’s principle is used to obtain the governing equations, and the shell’s equations of motion are derived with ...

A class of enhancement techniques is proposed for images in arbitrary dimension D. They are free from either space/frequency (scale) or grey references. There are two subclasses. One subclass is the chain: {Negative Laplace operator, Multiplication by Power (γ−1) of modulus-Laplace value, Inverse Negative Laplace operator} together with generalized versions. The generalization of the Negative L...

Introduction Parallel RF excitation using multi-element transmit coils is of interest to reduce pulse duration for spatially selective excitation. Originally, RF pulse design was formulated in the frequency domain for arbitrary k-space trajectories (Transmit-SENSE, [1]) or in the spatial domain for echo-planar trajectories [2]. Later, Transmit-SENSE was formulated in the spatial domain in [3] a...

2 Introduction 2 2.1 Signal Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.1.1 The B0 field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.1.2 The B1 or RF field . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.3 Free Induction Decays and Spin Echos . . . . . . . . . . . . . . . . . 6 2.2 Gradient Fields: Encoding Spatial Infor...