Abstract:

This paper presents a novel phase discriminator called robust digital phase discriminator (RDPD) for one-bit analog-to-digital conversion (ADC) software-defined receivers. Differing from the existing digital phase discriminator (DPD), the proposed RDPD estimates carrier phases of I-branch and Q-branch separately and then fuses the estimation results to achieve a higher precision and better robustness. Analysis and simulation results indicate that the proposed RDPD outperforms traditional arctangent phase discriminator (APD) and DPD in estimation precision whether the signal-to-noise ratio (SNR) is high or low.