Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1987-01-07
1989-01-03
Pellinen, A. D.
Pulse or digital communications
Spread spectrum
Direct sequence
370105, H04L 700
Patent
active
047962828
ABSTRACT:
In a frame synchronization system for synchronizing a frame consisting of N sub-frames each consisting of M bits, a transmitting side includes a circuit for generating an N-bit cyclic code from a generating polynomial and sequentially and respectively inserting bits of the cyclic code in bit positions of the sub-frames, and a receiving side includes a divider for dividing a code polynomial having N-bit values of the data trains as coefficients by the generating polynomial to output the remainder, and a frame synchronization detector for sending a frame synchronization clock signal to the N-bit data train producing circuit when the remainder from the divider is zero.
REFERENCES:
patent: 3952162 (1976-04-01), Texier et al.
patent: 4316284 (1982-02-01), Howson
patent: 4594728 (1986-06-01), Niquel et al.
Jennings Derek S.
NEC Corporation
Pellinen A. D.
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