Code word determination

Details Code word determination Code word determination

1976-06-08

1978-02-14

Ruggiero, Joseph F.

Boots, shoes, and leggings

325 42, 325320, 329104, 329129, G06G 712, H04L 700

Patent

active

040741192

ABSTRACT:
A method and circuit for determining a unique word contained in received signals in a transmission system which operates with a multiple phase type of modulation at the transmitter and coherent demodulation at the receiver, the unique word being transmitted only as signals in two phases which are 180.degree. apart and the received signals being divided into orthogonal voltage components during demodulation, a single value whose algebraic sign is indicative of the unique word being derived by dividing the orthogonal components to form a quotient signal representative of the ratio therebetween, integrating the quotient signal over a plurality of clock pulse periods, multiplying the integrated quotient signal with one of the orthogonal components, and adding the resultant product signal to the other orthogonal component to form the single value.

REFERENCES:
patent: 3568066 (1971-03-01), Fujimara
patent: 3838350 (1974-09-01), Ewanus et al.
patent: 3855533 (1974-12-01), Schueli
patent: 3891959 (1975-06-01), Tsuji et al.
patent: 3993956 (1976-11-01), Gilmore et al.

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