Pulse or digital communications – Repeaters – Testing
Patent
1986-04-28
1988-07-19
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
333 18, H03H 730
Patent
active
047590378
ABSTRACT:
A technique is disclosed for equalizing an incoming signal including quadrature-related carrier signals by forming the product of the incoming signal at at least one prescribed time and only one real-valued coefficient associated with each time. In one embodiment of the present invention, the equalized incoming signal is demodulated into a first pair of component signals. At least one of these component signals is then used to generate each coefficient. In another embodiment of the present invention, each coefficient is generated in response to at least one of the component signals in the first pair along with a second pair of component signals which are formed by demodulating the incoming signal. This technique can be advantageously adapted to incorporate a number of coefficient updating algorithms and is suitable for use in a number of modulation formats.
REFERENCES:
patent: 3755738 (1973-08-01), Gitlin et al.
patent: 4004226 (1977-01-01), Qureshi et al.
patent: 4247940 (1981-01-01), Mueller et al.
patent: 4384355 (1983-05-01), Werner
patent: 4475211 (1984-10-01), Mattis, Jr. et al.
patent: 4607377 (1986-08-01), Atobe et al.
Debus, Jr. Walter
Karabinis Peter D.
American Telephone and Telegraph Company
Bell Telephone Laboratories Incorporated
Griffin Robert L.
Huseman Marianne
Padnes David R.
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