Real time signal processing software for multiplierless microprocessors

Different concepts to generate real time efficient signal processing software for microprocessors without hardwired multiplier have been recently introduced for application to digital signal filtering with fixed coefficients [1]. These approaches are extended to the generation of time efficient code for the computation of signal prediction (or filter with variable coefficients), autocorrelation (or correlation) as required in the area of digital speech processing. The reference processor, which has been specifically designed to allow both dynamic on-line code generation, is composed of a 16-bit ALU built around the Am2900 4-bit slice general purpose micro-processor which performs with a same level of accuracy as any general purpose floating point scientific program for the considered examples.