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Title:
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Efficient VLSI Architectures for Recursive Vandermonde QR Decomposition in Broadband OFDM Pre-distortion |
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Author:
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Guo, Yuanbin
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Type:
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Conference Paper |
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Keywords:
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OFDM; predistorter; QR decomposition; Vandermonde |
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Citation:
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Y. Guo,"Efficient VLSI Architectures for Recursive Vandermonde QR Decomposition in Broadband OFDM Pre-distortion," in IEEE Wireless Communications and Networking Conference, |
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Abstract:
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The Vandermonde system is used in OFDM predistortion
to enhance the power efficiency dramatically. In this
paper, we study efficient FPGA architectures of a recursive
algorithm for the Cholesky and QR factorization of the
Vandermonde system. We identify the key bottlenecks of the
algorithm for the real-time constraints and resource consumption.
Several architecture/resource tradeoffs are studied to find the
commonalities in the architectures for a best partitioning.
Hardware resources are reused according to the algorithmic
parallelism and data dependency to achieve the best timing/area
performance in hardware. The architectures are implemented in
Xilinx FPGA and tested in Aptix real-time hardware platform
with 11348 cycles at 25ns clock rate. |
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Date Published:
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2005-03-01 |
