A cyclic prefix based adaptive channel estimation algorithm for multicarrier systems

Authors:
Hassan Ali
Affiliations:
School of Electrical Engineering and Computer Science, Faculty of Engineering and Built Environment, The University of Newcastle, Australia
Venue:
ISSPIT '10 Proceedings of the The 10th IEEE International Symposium on Signal Processing and Information Technology
Year:
2010

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CP-based SBHT-RLS algorithms for tracking channel estimates in multicarrier modulation systems

Journal of Electrical and Computer Engineering - Special issue on Implementations of Signal-Processing Algorithms for OFDM Systems

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Abstract

This paper presents an adaptive channel estimation algorithm that exploits cyclic prefix (CP) from its data detection part and employs systolic block Householder transformation recursive least squares (SBHT-RLS) algorithm for channel tracking in multicarrier systems. The new method is computationally cheaper than CP exploiting correlation matrix based block RLS (CMB-RLS) channel estimation approach, and possesses desirable properties for very large-scale integration (VLSI) implementation. Our floating point simulations show that the new algorithm can track the channel with better steady state performance. Also, it is determined that the precision of floating-point computation of the proposed method can be well approximated with a 24-bit word length fixed point computation.