Guo, Yuanbin2007-10-312007-10-312005-03-012005-03-01Y. Guo, "Efficient VLSI Architectures for Recursive Vandermonde QR Decomposition in Broadband OFDM Pre-distortion," 2005.https://hdl.handle.net/1911/19934Conference PaperThe 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.engOFDMpredistorterQR decompositionVandermondeConference paperOFDMpredistorterQR decompositionVandermondehttp://dx.doi.org/10.1109/WCNC.2005.1424567