Parameter Selection in Complex-Valued Two-Channel Modulo ADC Sampling System

Abstract

Modulo Analog-to-digital converters (ADCs) extend the dynamic range of conventional ADCs by folding input signals, enabling the acquisition of signals beyond traditional limits. This paper presents two approaches for parameter selection in conjugate complex-valued 2-channel modulo ADC systems to improve error tolerance. The first is a closed-form suboptimal method, which offers a near-optimal solution, making it suitable for efficiency-sensitive applications. The second is an effective search-based method that identifies the exact optimal solution with relatively low computational cost. Simulations show that the sub-optimal method provides performance close to the optimal solution, while the search-based method achieves precise optimisation with manageable computational requirements.