Pulse or digital communications – Transmitters – Angle modulation
Patent
1995-04-28
1998-05-05
Ghebretinsae, T.
Pulse or digital communications
Transmitters
Angle modulation
332100, H04L 2712
Patent
active
057486794
ABSTRACT:
A modulated clock MSK modulator that separately modulates a sinusoidal clock signal by square wave I and Q digital data signals prior to the I and Q data signals being modulated onto a carrier wave signal. Mixers or applicable biphase switches are utilized to impress the I and Q digital data signal information onto the clock signal by inverting or non-inverting the clock signal on separate I and Q data rails to create I and Q modulated clock signals separated in phase. The I channel data modulated clock signal and the Q channel data modulated clock signal are then separately applied to a conventional quadraphase modulator to be separately modulated onto a carrier wave signal, and the summed together to be transmitted.
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Finkenbeiner Pascal G.
Kolze Thomas J.
Ghebretinsae T.
TRW Inc.
Yatsko Michael S.
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