Aerospace and Electronic Systems Magazine July 2017 Tutorial XI - 65

IEEE AES Tutorials

TUTORIAL III
Published as Part 2 of IEEE Aerospace & Electronic Systems
Magazine
Volume Twenty-One-Number Six-June 2006

A REVIEW OF DISTRIBUTED POWER SYSTEMS PART II: HIGH
FREQUENCY AC DISTRIBUTED POWER SYSTEMS
SHIGUO LUO
ISSA BATARSEH, Fellow, IEEE
University of Central Florida

space-time adaptive processing (STAP) with reduced dimension,
subarrays and generalized sidelobe canceller (GSLC) configurations. The performance of these monopulse applications can be
predicted by exploiting the distribution of the monopulse ratio.
It is demonstrated that this distribution is more realistic than the
Cram´er-Rao bound (CRB). Several examples of performance
of monopulse estimators are given for thinned and fully filled
planar arrays, adaptive beamforming with and without low sidelobes, GSLC, and STAP. Finally, conditions for estimates with
low variance are discussed.

TUTORIAL IV

The present development state in high frequency (HF) ac distributed power systems (DPS) is reviewed. First, background and motivations of developing HF AC-DPS are addressed. Two types of
basic HF AC-DPSs based on sine wave and square/PWM (pulsewidth modulated) wave bus are described, and the system level
design considerations are discussed. Further, the issues and challenges in this research area are identified. These issues include high
electromagnetic interference (EMI) level, difficulty to back up
power, nonredundant system structure and limited post-regulation
capability, etc. Finally, a viable HF AC-DPS is proposed, which is
expected to yield effective EMI trade-off and system redundancy.
This is Part II of a two part review of Distributed Power Systems. Part I: DC Distributed Power System appeared in
Tutorial II, August 2005. See Abstracts, page 87, for more details.

Published as Part 2 of IEEE Aerospace & Electronic Systems
Magazine
Volume Twenty-Two-Number Nine-September 2007

A BEGINNER'S GUIDE TO INTERFEROMETRIC SAR CONCEPTS
AND SIGNAL PROCESSING
MARK A. RICHARDS, Senior Member, IEEE
Georgia Institute of Technology

This paper presents an overview of the main topics related to biometric security technology, with the central purpose to provide a
primer on this subject.
Biometrics can offer greater security and convenience than
traditional methods for people recognition. Even if we do not
want to replace a classic method (password or handheld token) by
a biometric one, for sure, we are potential users of these systems,
which will even be mandatory for new passport models. For this
reason, it is useful to be familiarized with the possibilities of biometric security technology.

Interferometric synthetic aperture radar (IFSAR, also abbreviated
as InSAR) employs pairs of high resolution SAR images to generate high quality terrain elevation maps using phase interferometry
methods. IFSAR provides an all-weather, day/night capability to
generate measurements of terrain elevation on a dense grid of sample points with accuracies of ones of meters. Both spaceborne and
airborne IFSAR systems are in use.
In this paper we present a tutorial introduction to the concepts, techniques, and applications of IFSAR. After a brief introduction to digital elevation models (DEMs) and digital terrain
elevation data (DTED), the fundamental IFSAR equation relating interferometric phase measurements to terrain elevation is
derived from simple geometric considerations. The central section of the paper describes the major algorithmic steps required
to form an IFSAR terrain map. Finally, variations of IFSAR for
mapping terrain elevation or reflectivity changes are briefly described. A web site at users.ece.gatech.edu/»mrichard/AESS IFSAR.htm provides access to color versions of many of the IFSAR
images included in this paper.

OVERVIEW OF GENERALIZED MONOPULSE ESTIMATION

LORAN DATA MODULATION: A PRIMER

ULRICH NICKEL
FGAN-FHR
Germany

SHERMAN C. LO, Member, IEEE
Stanford University
BENJAMIN B. PETERSON, Senior Member, IEEE
Peterson Integrated Geopositioning
PER K. ENGE, Fellow, IEEE
Stanford University

BIOMETRIC SECURITY TECHNOLOGY
MARCOS FAUNDEZ-ZANUY
Escola Universitaria Politècnica de Mataró Spain

Monopulse is an established technique for radar angle estimation. One can show that monopulse estimation is based on a general approximation derived from maximum likelihood (ML) estimation. This tutorial provides a derivation of this relation and
presents extensions of this monopulse principle to multi-dimensional array and parameter estimation problems, in particular to
JULY 2017, Part II of II

Loran has provided navigation service since 1958. Though not
originally designed with data broadcast capabilities, Loran's versatility has enabled data to be broadcast with great benefits.

IEEE A&E SYSTEMS MAGAZINE

Table of Contents for the Digital Edition of Aerospace and Electronic Systems Magazine July 2017 Tutorial XI