Least-Squares-Based Iterative Multipath Super-Resolution Technique | |
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Year | 2013 |
Month | |
Journal | Feb 2013 / IEEE Transactions on Signal Processing [SCI, IF 2.813, JCR Top 9.31%, SJR 2.074], vol. 61, no. 3, pp. 519-529, |
Author | Wooseok Nam and Seung-Hyun Kong* |
Link |
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In this paper, we investigate the multipath resolution
problem for direct sequence spread spectrum signals. To resolve
multipath components arriving within a very short interval, we
propose a new multipath super-resolution algorithm based on the
iterative least-squares method. The proposed least-squares-based
iterative multipath super-resolution (LIMS) algorithm exploits a
triangular shaped auto-correlation function (ACF) of the pseudonoise (PN) sequence and simplifies the least-squares parameter estimation procedure using iterative and algebraic operations. This
results in an algorithm demanding low computational load with
a high multipath resolution capability. It is also discussed that the
LIMS algorithm can be applied for recursive multipath tracking of
source localization systems, such as the global navigation satellite
systems (GNSS). Simulation results show that the LIMS algorithm
maintains its good performance even in a low or severe multipath interference conditions. |