A novel analog-to-digital conversion pre-processor uses a modulo-based signal folding method to overcome the limited dynamic range of conventional ADCs. The folded signal is reconstructed using a dedicated unfolding algorithm, enabling precise signal recovery across a wide amplitude spectrum. This novel architecture enables accurate reconstruction of the original signal, ensuring accurate signal conversion across a wide amplitude range. This technology extends the effective dynamic range of ADCs, improving performance in demanding applications such as radar, ultrasound imaging, and hearing aids.
- Ultrasound imaging
- Radar systems
- Sonar technology
- High-dynamic range camera
- Hearing aids
- Extends dynamic range beyond ADC limits
- Accurate signal recovery
- Reduced power consumption
A hardware prototype and unfolding algorithm were developed, enabling sampling at 1/6 the Nyquist rate and supporting signals with 8× greater dynamic range.
A schematic of modulo-sampling and reconstruction
Oscilloscope screenshot showing 1 kHz sinusoid (yellow), modulo-folded output (green), and DVG signal (blue) with peak amplitude of 4λ
