Friday, July 1, 2011

CORDIC Techniques in Adaptive Anti-Interference

Hang Li, ChenYang Li, and Yaohuan Gong

The University of Electronic Science and Technology of China
Chengdu, Sichuan, P.R. China


Fixed point CORDIC processors are used here to implement QRD based anti-interference algorithm. For CORDIC is most efficient to fulfill rotation operation, conventional QRD algorithm is revised so that no back-substitution and division operation are required, and weights are produced concurrent with data input by and additional triangular array. Computational simulation has shown that fixed point CORDIC QRD in this version has good numerical performance. When iteration number reaches 20 or above and arithmetic word length reaches 20 bits, both the convergence error and round-up error have reduced to 0.007%. Array structure of CORDIC processors has also been described as well as data flow graph.

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