Multiplex communications – Generalized orthogonal or special mathematical techniques – Quadrature carriers
Patent
1994-10-21
1999-03-09
Nguyen, Chau
Multiplex communications
Generalized orthogonal or special mathematical techniques
Quadrature carriers
370527, H04J 1100
Patent
active
058810471
ABSTRACT:
A first phase change is introduced to an analog signal based on a symbol specified by a data signal, where the symbol is one of a plurality of symbols in a symbol constellation. The analog signal is added to the data signal to form a combined signal which is transmitted over a communication channel that introduces a channel phase change to the analog and data signals. After transmission through the communication channel, the combined signal comprises a phase changed analog signal and a phase changed data signal. A received symbol is specified by the phase changed data signal, and a phase shift is introduced to the phase changed analog signal based on the identity of the received symbol.
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Bremer Gordon
Ko Kenneth David
Smithwick Luke J.
Nguyen Chau
Paradyne Corporation
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