Journal of Systems Engineering and Electronics ›› 2011, Vol. 33 ›› Issue (1): 173-0178.doi: 10.3969/j.issn.1001 506X.2011.01.36

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Robust digital phase discriminator in one-bit quantized software-defined receivers

ZHAO Jin1,2,ZHANG Jian-qiu1,2,YIN Jian-jun1,2,LI Yang1   

  1. 1. Department of Electronic Engineering, Fudan University, Shanghai 200433, China;
    2. State Key Laboratory of ASIC & System, Fudan University, Shanghai 201203, China
  • Online:2011-01-20 Published:2010-01-03

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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.

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