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Published in:
2010 | OriginalPaper | Chapter
Transposed UL-PUSC Subcarrier Allocation Technique for Channel Estimation in WiMAX
Authors : Maged M. Khattab, Hesham M. EL-Badawy, Mohamed A. Aboul-Dahab
Published in: Communication and Networking
Publisher: Springer Berlin Heidelberg
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This paper introduces a new pilot pattern design for channel estimation in WiMAX. Current WiMAX systems use a subcarrier allocation technique known as Uplink Partial Usage of Subcarriers (UL-PUSC). It is based on tile structure that consists of 4 subcarriers by 3 OFDMA symbols with 4 pilots in the corners to aid the channel estimation process. We propose a new pilot pattern called “transposed UL-PUSC”. It consists of 3 subcarriers by 4 OFDMA symbols. We compare between the performance of the conventional UL-PUSC and our proposed one under different radio channel conditions. We finally propose an adaptive algorithm that selects the optimum pilot pattern based on channel conditions.