REDUCED Z-DATAPATH CORDIC ROTATOR

In this article we propose a novel scheme based on virtually scaling-free COordinate Rotation DIgital Computer (CORDIC) algorithm to design a hardware efficient CORDIC rotator. For predicting rotation directions, less than 1/3rd of the elementary rotational stages require classical CORDIC iteration. The rest of the iteration directions could be computed in parallel and the corresponding z-datapath could be eliminated. A 16-bit implementation of the processor requires 0.23 mm2 silicon area and consumes 967.8 µW power when synthesized in 0.18 µm technology. Index Terms — CORDIC, low-power, computer arithmetic 1