Low signal-to-noise ratio symbol synchronizer

Details Low signal-to-noise ratio symbol synchronizer Low signal-to-noise ratio symbol synchronizer

1983-06-23

1985-07-23

Safourek, Benedict V.

Pulse or digital communications

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329 50, 370 20, 375119, H03D 306, H04L 702

Patent

active

045312249

ABSTRACT:
A low SNR symbol synchronizer utilizes two quadrature channels and a delay and multiply technique to produce four product signals. Two of the product signals are same-channel products and two are cross-channel products. When combined and applied to a synchronizing apparatus such as a Costas loop, the signals provide improved performance at low SNR and avoid the need to know the carrier frequency when setting the delay.

REFERENCES:
patent: 3675131 (1972-07-01), Pickholtz
patent: 4064361 (1977-12-01), Kustka et al.
patent: 4359692 (1982-11-01), Ryan
patent: 4397039 (1983-08-01), McAuliffe
patent: 4419759 (1983-12-01), Poklemba

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