Dual Fixed-Point: An Efficient Alternative to Floating-Point Computation

Abstract. This paper presents a new data representation known as Dual FiXedpoint (DFX), which employs a single bit exponent to select two different fixedpoint scalings. DFX provides a compromise between conventional fixed-point and floating-point representations. It has the implementation complexity similar to that of a fixed-point system together with the improved dynamic range offered by a floating-point system. The benefit of using DFX over both fixed-point and floating-point is demonstrated with an IIR filter implementation on a XilinxVirtex II FPGA.

• Type: Conference
• Year: 2004
• Where: FPL
• Authors: Chun Te Ewe, Peter Y. K. Cheung, George A. Constantinides
• Keywords: Conventional Fixed-point, Floating-point, Floating-point Representations, FPL 2004, Hardware