04835517 is referenced by 287 patents and cites 8 patents.

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 synchronizes the code signal with the A.C. signal. Preferably a coherent system is provided in which a data signal involved has a bit rate an integral multiple of the A.C. signal frequency and in which a carrier generator is additionally provided to produce a carrier signal of a frequency an integral multiple of the A.C. signal frequency. In such case, the synchronization means also synchronizes the data bit and carrier signals with the A.C. signal.

Title
Modem for pseudo noise communication on A.C. lines
Application Number
6/622636
Publication Number
4835517
Application Date
June 20, 1984
Publication Date
May 30, 1989
Inventor
Robert W Donaldson
Vancouver
CA
Peter K van der Gracht
Burnaby
CA
Agent
Christie Parker & Hale
Assignee
The University of British Columbia
CA
IPC
H04B 15/00
H04M 11/04
View Original Source