Synchronization detection system for data transmission

Details Synchronization detection system for data transmission Synchronization detection system for data transmission

1984-05-09

1986-08-26

Bookbinder, Marc E.

Pulse or digital communications

Spread spectrum

Direct sequence

375 13, 375 39, H04L 704, H04L 2302

Patent

active

046087036

ABSTRACT:
A synchronization detecting system for data transmission in which a two-dimensionally modulated signal is received by way of a demodulator. In a training sequence for a two-dimensional modulation modem, a point of transition from an alternation to a pseudorandom symbol sequence is detected by producing a sum of the vectors of two signals which are remote from each other by a period of two samples, or a difference therebetween. Whether the detection of the transition point has been correct is decided utilizing the alternation.

REFERENCES:
patent: 3694757 (1972-09-01), Hanna, Jr.
patent: 4027250 (1977-05-01), Lang
patent: 4334313 (1982-06-01), Gitlin et al.
patent: 4381546 (1983-04-01), Armstrong
patent: 4433425 (1984-02-01), de Jaeger

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