Andrew P. Worthen

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— Iterative algorithms are an attractive approach to approximating optimal, but high-complexity, joint channel estimation and decoding receivers for communication systems. We present a unified approach based on factor graphs for deriving iterative message-passing receiver algorithms for channel estimation and decoding. For many common channels, it is easy(More)
This work addresses the challenge in providing reliable communication in mobile networks with intermittent, on/off links through the use of a routing overlay designed to deal with these channel impairments. Link blockage is a predominant feature of mobile networks operating at 10+ GHz frequencies, and current techniques are ill-suited to address this(More)
Opinions, interpretations, conclusions and recommendations are those of the authors and are not necessarily endorsed by the United States Government. Abstract As the demand for wireless communication systems grows, the need for spectrum grows accordingly. However, a large portion of the usable spectrum has already been exclusively licensed to various(More)
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