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Proceedings Paper

Robust detection via subspace design
Author(s): Chuang He; Jose M. F. Moura
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Paper Abstract

The goal of this paper is to describe a simple receiver with good performance for multipath communications channels. The new receiver is 'almost' invariant or robust to the multipath channel distortion. It preserves the simplicity of a traditional receiver-correlator receiver and at the same time approximates the computational intensive subspace receiver which is maximally invariant. The maximally invariant test statistic is the energy of the orthogonal projection of the received signal on the multipath signal subspace S. Calculating this orthogonal projection directly is a difficult multi-dimensional nonlinear optimization problem. Instead, we design a representation subspace G to approximate S. The gap metric is used as the measure between subspaces. The gap metric is closely related to the principle angles between subspaces. Wavelet multiresolution tools are called upon to facilitate the subspace design. Once we have designed the representation subspace G, we use the energy of the orthogonal projection of the received signal on G as the new test statistic. Simulation results demonstrate the robustness of the new receiver.

Paper Details

Date Published: 23 October 1996
PDF: 10 pages
Proc. SPIE 2825, Wavelet Applications in Signal and Image Processing IV, (23 October 1996); doi: 10.1117/12.255239
Show Author Affiliations
Chuang He, Carnegie Mellon Univ. (United States)
Jose M. F. Moura, Carnegie Mellon Univ. (United States)

Published in SPIE Proceedings Vol. 2825:
Wavelet Applications in Signal and Image Processing IV
Michael A. Unser; Akram Aldroubi; Andrew F. Laine, Editor(s)

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