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Peter K van der Gracht, Robert W Donaldson: Modem for pseudo noise communication on A.C. lines. The University of British Columbia, Christie Parker & Hale, May 30, 1989: US04835517 (287 worldwide citation)

A modem which may operate as a transmitter or receiver, is provided for use on a line carrying an A.C. signal. The modem comprises a pseudorandom code generator which produces a pseudorandom code signal of a frequency an integral multiple of the A.C. signal frequency. Synchronization means synchroni ...


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Van Der Gracht Peter K, Donaldson Robert W: Modem de communication sur lignes a courant alternatif, Modem for pseudo noise communication on a.c. lines. The University Of British Columbia, OYEN WIGGS GREEN & MUTALA, September 15, 1987: CA1226914

ABSTRACT A modem which may operate as a transmitter orreceiver, is provided for use on a line carrying an A.C.signal. The modem comprises a pseudorandom code genera-tor which produces a pseudorandom code signal of a fre-quency an integral multiple of the A.C. signal frequency. Synchronization means ...