This work combines compressive sensing and short word-length techniques to achieve localization target tracking in wireless sensor networks with energy-efficient communication between the network anchors fusion center. Gradient descent is performed using time-of-arrival (TOA) data which are indicative of distance thereby achieving range-based localization. The considered delta modulation sigma-...

In this paper a framework for the analysis of a family of high order interpolative sigma-delta modulators is introduced. It is shown that a large number of high order architectures can be reduced to a diagonal form which facilitates the stability analysis of the system. In addition, the diagonal form is a canonical form which illustrates the equivalence of a variety of sigma-delta architectures...

The group is responsible for selection, mutation, synthesis and testing of various lepidopteran specific delta-endotoxins of Bacillus thuringiensis. These are tested for their efficacy towards gram podborer and synergetic interactions among various toxins. Site-directed mutagenesis of genes specific to gram podborer is performed to enhance the efficacy of the deltaendotoxins. The gene encoding ...

Social scientists often compare subclasses of populations or manipulatons. For example, in comparing task-completion times across two levels of a manipulations, if one group has faster overall mean response, it is natural to ask if the fastest 10% of the first group has a faster mean than the fastest 10% of the second group, and so on. Delta plots, a type of quantilequantile residual plot used ...

|The high-order modulator is an appropriate approach for high-bandwidth, high-resolution A/D conversion. However, non-ideal e ects such as the nite opamp gain and the capacitor mismatch have great impacts on its performance at a low oversampling ratio. To achieve greater performance under the inevitable non-ideal e ects, we explore several multiple-bit schemes, based on our CIQE high-order arch...

Title of Dissertation: Shared Wideband Transmit Antenna Arrays: Optimal Pattern Synthesis and Spatio-Temporal Delta-Sigma Modulation Dan P. Scholnik, Doctor of Philosophy, 2006 Dissertation directed by: Dr. Tülay Adalı, Professor Computer Science and Electrical Engineering Dr. Jeffrey O. Coleman Naval Research Laboratory The use of a single transmit array to simultaneously performmultiple indep...

This paper describes the design of a Sigma-Delta modulator aimed for A/D conversion in xDSL applications, featuring 14-bit@4Msample/s in a 0.35μm mainstream digital CMOS technology. Architecture selection, modulator sizing and cell sizing tasks where supported by a CAD methodology, thus allowing us to obtain a power efficient implementation in a short design cycle.

A methodology for the design of Continuous-Time (CT) Sigma-Delta (Σ∆) modulators with VCO-based quantizer is proposed. The coefficients of the CT Σ∆ modulator are accurately calculated such that the noise transfer function of the modulator is exactly the same as a Discrete-Time (DT) Σ∆ modulator of the same order. Several design examples for different modulator orders and feedback DAC signal sh...