Title :
A Parallel Double-Step CORDIC Algorithm for Digital Down Converter
Author :
Wang Han ; Zheng Yousi ; Lin Xiaokang
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing
Abstract :
The coordinate rotation digital computer (CORDIC) algorithm is a widely studied and hardware-efficient iterative algorithm for evaluating many arithmetic operations. In this paper, we propose a parallel double step CORDIC algorithm. All rotation directions can be predicted in parallel while two rotations are processed in each iteration. The novel hybrid algorithm achieves much less delay and similar throughput compared with parallel CORDIC algorithm. Based on the new algorithm, we also provide a digital down converter architecture using dual CORDIC processor to eliminate both multiplier and CORDIC scale factor.
Keywords :
convertors; digital arithmetic; direct digital synthesis; iterative methods; coordinate rotation digital computer algorithm; digital down converter architecture; hardware-efficient iterative algorithm; parallel double-step CORDIC algorithm; Application software; Circuits; Communication networks; Computer networks; Concurrent computing; Delay; Digital arithmetic; Frequency synthesizers; Iterative algorithms; Throughput; CORDIC; digital down converter; double step; parallel CORDIC;
Conference_Titel :
Communication Networks and Services Research Conference, 2009. CNSR '09. Seventh Annual
Conference_Location :
Moncton, NB
Print_ISBN :
978-1-4244-4155-6
Electronic_ISBN :
978-0-7695-3649-1
DOI :
10.1109/CNSR.2009.47
