Efficient Implementation of Rotation Operations for High Performance QRD-RLS Filtering
ASAP '97 Proceedings of the IEEE International Conference on Application-Specific Systems, Architectures and Processors
50 years of CORDIC: algorithms, architectures, and applications
IEEE Transactions on Circuits and Systems Part I: Regular Papers
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In recent years, the classic method of Coordinate Rotation by Digital Computer (CORDIC) arithmetic has been widely implemented as part of the computational requirements of the well known QR-RLS (Recursive Least Squares) algorithm. In order to operate Givens rotation on a complex number value system, double angle complex rotation (DACR) was adopted to simplify the computational requirement of Complex Givens Rotation. This paper presents a new architecture of high speed CORDIC based single Processor Element (PE) that can be used to accomplish the complex value QR update based RLS. The implementation results on Xilinx FPGA implementaton demonstrates that the proposed structure results in a lower latency and lower cost.