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Estimation of channel parameters using iterative least squares approach for W-CDMA and UWB systems

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2 Author(s)
Balakrishnan, R.D. ; Dept. of Electr. & Comput. Eng., Wichita State Univ., KS, USA ; Kwon, H.M.

This paper proposes a new blind method to estimate the channel parameters such as the direction-of-arrival (DOA) and multipath time-of-arrival (TOA) for a communication system. We employ mathematical inverse problem techniques to find the solution. We specify an appropriate physical model to explain the received signal and reformulate the nonlinear estimation problem into a linear least squares problem. We then apply conjugate gradients (CG) iterations on the resulting normal equations (NE) to obtain the solution. We demonstrate our method for a W-CDMA system and extend the methods to an ultra-wideband (UWB) system. We also present a method for multiuser detection (MUD).

Published in:

Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on  (Volume:2 )

Date of Conference:

9-12 Nov. 2003