Because of limitation of low power and computational ability in mobile video devices, it is significant to develop energy-efficient wireless video compression methods for mobile video systems. In this paper, a new approach to low complexity wireless video compression is proposed, based on Wyner-Ziv coding theorem. The proposed method encodes video only by intracoding techniques and detection of...

This second paper of two companion papers on the estimation of power spectra specializes to the topic of estimating galaxy power spectra at large, linear scales using maximum likelihood methods. As in the first paper, the aims are pedagogical, and the emphasis is on concepts rather than technical detail. The paper covers most of the salient issues, including selection functions, likelihood func...

Large-signal behavior of HBT devices can depend strongly on the type of source used to bias the base of the devices. Understanding of this behavior is advanced using sample device measurements and model simulations. The device used is a wafer-level InGaP/GaAs HBT represented with a modified GummelPoon non-linear model. Results show that the use of constant voltage source allowed for a higher po...

The nanomechanical response properties of 3C-SiC nanowires are investigated using molecular dynamics simulation with Tersoff bond-order interatomic potential. Under axial compression and tensile strain, the computed Young’s modulus and structural changes at elastic limit do not depend appreciably on the diameter of the nanowire except for the nanowire of the smallest diameter 1 nm under compres...

We measure, for the first time, the gain compression coefficient and above-threshold linewidth enhancement factor (alpha parameter) in quantum dot (QD) distributed feedback lasers (DFB) by time-resolved-chirp (TRC) characterization. The alpha parameter is measured to be 2.6 at threshold and increases to 8 when the output power of the QD DFB is increased to 3 mW. The dependence of the above-thre...

This paper discusses signal processing and circuit techniques for ultra-low-power many-channel wireless telemetry. Signal processing has to be performed online to reduce transmit data rate. The choice of signal compression algorithm can greatly reduce energy, much beyond levels attainable by implementation. Since real-time performance required from biomedical implants is much lower than delay o...

For stable power system operation, various system parameters like voltage, current, frequency, active and reactive power etc. are monitored at a regular basis. These data are either stored in the database of the system or transmitted to the monitoring station through SCADA. If these data can be compressed by suitable data compression techniques, there will be reduced memory requirement as well ...

Methods for prefix coding integers generally either consider specific distributions that decline more quickly than a power law (for Golomb-like codes) or simultaneously consider all finite-entropy distributions (for universal codes). Particular power-law and similar distributions, however, are often known to model particular random variables. Codes for such distributions can be judged based on ...

A new NoC (network on chip) architecture using lossless data compression and decompression to improve the performance and power efficiency of the on-chip interconnect is proposed. In the proposed NoC scheme, the sender compresses the data to be transferred in order to reduce the number of data packets and the receiver decompresses the encoded data to restore the original data. For the lossless ...

To overcome the limited coverage in traditional wireless sensor networks, mobile crowd sensing (MCS) has emerged as a new sensing paradigm. To achieve longer battery lives of user devices and incentive human involvement, this paper presents a novel approach that seamlessly integrates MCS with wireless power transfer, called wirelessly powered crowd sensing (WPCS), for supporting crowd sensing w...