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Full-Text Articles in VLSI and Circuits, Embedded and Hardware Systems

Asynchronous Ds-Ss Cdma Random Spreading Code Correlation Statistics In The Presence Of Timing Error, David W. Matolak Nov 2005

Asynchronous Ds-Ss Cdma Random Spreading Code Correlation Statistics In The Presence Of Timing Error, David W. Matolak

Faculty Publications

We quantify the effect of timing tracking errors upon 2nd order correlation statistics of random binary spreading codes and, in so doing, fill a gap in the literature. Using a Gaussian model for timing tracking error, new expressions for autocorrelation statistics are derived. For crosscorrelations, we show that a zero mean Gaussian timing error has no effect upon 2nd order crosscorrelation statistics.


A Dsp-Based Active Disturbance Rejection Control Design For A 1-Kw H-Bridge Dc-Dc Power Converter, Bosheng Sun, Zhiqiang Gao Oct 2005

A Dsp-Based Active Disturbance Rejection Control Design For A 1-Kw H-Bridge Dc-Dc Power Converter, Bosheng Sun, Zhiqiang Gao

Electrical and Computer Engineering Faculty Publications

This paper presents the design and implementation of an advanced digital controller for a 1-kW H-bridge dc-dc power converter. A new control algorithm based on the active disturbance rejection concept is developed to cope with the highly nonlinear dynamics of the converter and the disturbances. An experimental digital control system is used to implement the new control strategy. It consists of a digital control board based on the TMS320C6711 digital signal processor chip, an analogy I/O board, and a complex programmable logic device pulsewidth-modulation generation board. Using a newly developed bandwidth-parametrization technique, an autotuning method based on noise quantification is …


Platform Thinking In Embedded Systems, Robert Iannucci Dec 2004

Platform Thinking In Embedded Systems, Robert Iannucci

Robert A Iannucci

No abstract provided.


On-Chip Implementation Of Cascaded Integrated Comb Filters (Cic) For Dsp Application, Rozita Teymourzadeh, Masuri Othman Dec 2004

On-Chip Implementation Of Cascaded Integrated Comb Filters (Cic) For Dsp Application, Rozita Teymourzadeh, Masuri Othman

Dr. Rozita Teymourzadeh, CEng.

This paper presents the design of a CIC filters based on a low-pass filter for reducing the sampling rate, also known as decimation process. The targeted application for the filter is in the analog to digital conversion (ADC).The CIC is chosen because of its attractive property of both low power and complexity since it dose not required multipliers. Simulink toolbox available in Matlab software is used to design and simulate the functionality of the CIC filter. This paper also shows how sample frequency is decreased by CIC filter and it can be used to give enough stop-band attenuation to prevent …