Pulse or digital communications – Repeaters – Testing
Patent
1994-01-04
1995-11-21
Cain, David C.
Pulse or digital communications
Repeaters
Testing
375208, 380 34, 380 46, H04L 900, H04J 1302
Patent
active
054694701
ABSTRACT:
A transmission terminal modulates, for a first state of given data signal, a non-return-to-zero code pseudo-noise signal onto a carrier band. Further, the terminal modulates, for a second state of the given data signal a Manchester-code pseudo-noise signal onto the carrier band. The terminal then sends a communication signal comprising the non-return-to-zero-code pseudo-noise signal and the Manchester-code pseudo-noise signal. A receiving terminal receives the communication signal and then uses, as an error signal, a signal resulting from multiplication of first and second correlation signals, the first correlation signal concerning the correlation between the communication signal, a reference pseudo-noise signal, and a clock signal which is used for generating the reference pseudo-noise signal, and the second correlation signal concerning the correlation between the communication signal and the reference pseudo-noise signal. The receiving terminal then demodulates the communication signal by comparing between magnitudes of the first and second correlation signals.
REFERENCES:
patent: 5164985 (1992-11-01), Nysen et al.
Cain David C.
Ricoh & Company, Ltd.
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