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1-Bit High Accuracy Carrier Phase Discriminators

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3 Author(s)
Chieh-Fu Chang ; Dept. of Electr. Eng., Nat. Space Organ., Hsinchu, Taiwan ; Ru-Muh Yang ; Ming-Seng Kao

Asymptotic derivation of traditional 1-bit arctangent phase discriminator (APD) is derived, even though neighboring quantized samples are dependent. The results reveal that high accuracy can be achieved by an APD in low signal-to-noise ratio (SNR) applications using sufficient samples. For high- SNR applications a novel phase discriminator called noise-balanced digital phase discriminator (NB-DPD), which has a complementary asymptotic performance of APD, is proposed to achieve high accuracy. The threshold SNR 2.6 dB that is suggested to identify either APD or NB-DPD is adopted in a specific application. Finally the sampling, quantization, and environmental noise effects on convergence of the asymptotic performance are discussed, and the simulations are provided to verify the analytical results.

Published in:

IEEE Transactions on Aerospace and Electronic Systems  (Volume:49 ,  Issue: 1 )