Pulse or digital communications – Receivers – Angle modulation
Reexamination Certificate
2004-05-06
2009-12-29
Ghayour, Mohammad H (Department: 2611)
Pulse or digital communications
Receivers
Angle modulation
C375S242000, C375S243000, C375S244000, C375S245000, C375S246000, C375S247000, C375S340000, C375S342000, C341S077000, C341S143000, C341S144000
Reexamination Certificate
active
07639757
ABSTRACT:
A pulse modulator has a subtraction stage that produces a control error signal from the difference between a complex input signal and a feedback signal. A signal conversion stage converts the control error signal to a control signal. The control signal is multiplied by a complex mixing signal at the frequency ω0in a first multiplication stage. At least one of the real and imaginary parts of the up-mixed control signal is then quantized by a quantization stage to produce a real pulsed signal. The pulsed signal is then employed to produce the feedback signal for the subtraction stage in a feedback unit. The pulse modulator according to the invention allows the range of reduced quantization noise to be shifted toward a desired operating frequency ω0.
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Ghayour Mohammad H
Kramsky Elloitt N.
LITEF GmbH
Vlahos Sophia
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