A high-throughput fixed-point complex divider for FPGAs

Abstract

This paper presents a high-throughput fixed-point complex divider which uses four pipelined CORDIC units to transform and divide complex numbers in Polar coordinates. By persevering the macro-angle for CORDIC rotations in redundant form and developing an optimized pipelining structure, the FPGA based implementation achieves a 9× advantage on throughput over the best design reported. In addition, the final error is guaranteed within 1ulp (unit in last position). Thus the proposed complex divider is highly suitable for accelerating DSP applications with high precision numerical accuracy requirements.