Pulse or digital communications – Repeaters – Testing
Patent
1987-06-15
1989-01-31
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
370118, 375 48, 375122, H04L 2710
Patent
active
048021903
ABSTRACT:
Method of transmitting information by means of code signals, information transmission systems for carrying out the method, and transmitting and receiving apparatus for use in the information transmission system.
A method of and system for transmitting n-bit information words is revealed, using code signals (Sc, x.sub.i) in which the bits (b.sub.1, b.sub.2, b.sub.3, b.sub.4) having corresponding bit positions in different information words are always represented by frequency components (fd1, fd2, fd3, fd4; fh1, fh2, fh3, fh4) in the same frequency range of the frequency spectra of the code signals (Sc, x.sub.i). Bits having different bit positions are represented by frequency components which are situated in different frequency ranges of the frequency spectra of the code signals. After transmission of the code signals the individual bits of the information words are recovered by means of frequency-domain detection.
REFERENCES:
patent: 4001564 (1977-01-01), Bied-Charreton
patent: 4011511 (1977-03-01), Chang
patent: 4601045 (1986-07-01), Lubarsky
J. A. Gordon and R. Barrett, "Correlation-Recovered Adaptive Majority Multiplexing", Proc. IEE, vol. 118, No. 3/4, (1971), pp. 417-422.
Barschall Anne E.
Briody Thomas A.
Haken Jack E.
Safourek Benedict V.
U.S. Philips Corporation
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