Topics in CT and SAR Imaging: Fast Back -Projection Algorithms and Optimal Antenna Spacings

Another study is motivated by the investigation of the phase unwrapping problem in 3-D SAR imaging. In this thesis, we study the optimal antenna spacings for pointwise terrain height estimation. In particular, we start from the maximum likelihood estimates of the terrain height. The ambiguous terrain height derived from any pair of antennas is modeled by a periodic waveform with each period having a Gaussian shape. For multiple pairs of antennas, the corresponding waveforms have different periods, which helps resolve the ambiguity. For the three-antenna case, a closed-form formula approximating the mean squared error (MSE) of the estimated terrain height is derived as a function of antenna spacing. By minimizing the MSE, we determine the optimal antenna spacing. The algorithm is tested with simulated data.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Xiao, Shu

Contributors dc:contributor

• Munson, David C., Jr.

• Engineering, Electronics and Electrical

Language dc:language

eng

Identifier

(MiAaPQ)AAI3070566

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/80812