A New Method for Carrier Recovery for Binary PSK Systems

Naofumi NAGAI  Tetsuro ENDO  Shinsaku MORI  

IEICE TRANSACTIONS (1976-1990)   Vol.E61   No.9   pp.690-696
Publication Date: 1978/09/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Electroic Circuits

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A New carrier recovery subsystem for binary PSK systems using synchronized push-pull oscillator is described. A property that the push-pull oscillator has two stable states of which the phase difference is π, can be well applied for this purpose. This new subsystem does not include phase-locked loop (PLL), therefore pull-in time and pull-in range are not limited by the loop delay of PLL. The circuit of this push-pull oscillator is very simple. Yet, it is proven to achieve rather good performance, if a limiter which normalizes the input amplitude, when practically deformed on account of the band-limiting, is attached. Our experiments have had good agreement with the theory and computer simulation.