Method and apparatus for carrier synchronization acquisition in

Details Method and apparatus for carrier synchronization acquisition in Method and apparatus for carrier synchronization acquisition in

1991-01-25

1993-05-25

Kuntz, Curtis

Pulse or digital communications

Repeaters

Testing

375 39, 455 60, 455265, 328155, 329304, H04L 2706

Patent

active

052146740

ABSTRACT:
An apparatus for obtaining carrier synchronization acquisition in a digital burst mode communication system is provided. An accurate estimate of the carrier phase of the unmodulated preamble, .theta., is obtained by determining which of 256 intervals X.sub.o.sup.2 +X.sub.e.sup.2 fall into, and by evaluating which of 256 intervals Y.sub.o.sup.2 +Y.sub.e.sup.2 fall into. A quantized value is assigned to the generated output code for both X and Y inputs. The square root and arc tangent are evaluated to determine the value .theta..

REFERENCES:
patent: 3522537 (1970-08-01), Boughtwood
patent: 4807256 (1989-02-01), Holmes et al.
patent: 4914676 (1990-04-01), Iwamatsu et al.
patent: 4977580 (1990-12-01), McNicol

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