Dithered quantizers with negligible in-band dither power

TL;DR

This paper presents a method for designing subtractive dithered quantizers with FIR filters to reduce in-band dither power, enhancing quantizer performance while maintaining dithering benefits.

Contribution

It introduces a detailed design approach for FIR filters that shape dither power out of the signal band in subtractive dithered quantizers.

Findings

FIR filter design effectively reduces in-band dither power.

Simulation results demonstrate improved quantizer performance.

Design considerations are outlined for low-medium resolution quantizers.

Abstract

Subtractive dithered quantizers are examined to minimize the signal-band dither power. The design of finite impulse response(FIR) filters that shape most of the dither-power out of the signal band while maintaining the benefits of dithering are dealt with in detail. Simulation results for low-medium resolution quantizers are presented to highlight the overall design consideration.