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On Uplink Channel Estimation in WiMAX Systems
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Author(s): Yushi Shen (Microsoft, USA), Pamela C. Cosman (University of California, San Diego, USA), Laurence B. Milstein (University of California, San Diego, USA)and Eduardo F. Martinez (Freescale Semiconductor Inc., USA)
Copyright: 2012
Pages: 9
Source title:
Advancing the Next-Generation of Mobile Computing: Emerging Technologies
Source Author(s)/Editor(s): Ismail Khalil (Johannes Kepler University Linz, Austria)and Edgar R. Weippl (Secure Business Austria, Austria)
DOI: 10.4018/978-1-4666-0119-2.ch007
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Abstract
In this paper, channel estimation algorithms are proposed and compared for uplink WiMAX systems, which are OFDMA based. These algorithms are investigated based on a dynamic resource allocation scheme, and it is shown that each of them is suitable to specific system scenarios. For example, for a system with a bandwidth of 10MHz operating in the low frequency region (2-11GHz), a two-dimensional averaging algorithm outperforms other algorithms, such as a bilinear interpolation algorithm, because the correlations between the pilots and signals are sufficiently high in both the frequency and the time dimensions.
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