Subspace-based Tracking of Multipath Channel Parameters for CDMA Systems
Cavallaro, Joseph R.
Code Division Multiple Access (CDMA); Singular Value Decomposition (SVD); subspace; multipath channel parameters
In this paper, we evaluate several issues in the application of subspace based methods to tracking channel parameters in Code Division Multiple Access (CDMA) communication systems, in the presence of multipath fading. We focus on two aspects of the problem - the performance of Singular Value Decomposition (SVD) based schemes while tracking the time variations in the signal subspace, due to fading, and, the performance trades involved in using several complexity reducing approximate schemes. The performance benefits to be obtained from application of subspace based methods to channel estimation has been well studied. The aim of this work is to lay the groundwork for real time implementation of this computationally complex problem.
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