Processing of modulated signals

Details Processing of modulated signals Processing of modulated signals

2006-06-27

2006-06-27

Tran, Khai (Department: 2637)

Pulse or digital communications

Receivers

Angle modulation

C455S226100

Reexamination Certificate

active

07068740

ABSTRACT:
In response to a first signal having modulation representing information and a modulation index, embodiments of the present invention generate a second signal that differs from the first signal in its modulation index, and demodulate the second signal. In one embodiment, an arrangement having a signal processor is adapted to receive a first signal having modulation representing information and having a first modulation index and to generate, in response to the first signal, a second signal having frequency modulation representing the information and having a second modulation index different from the first modulation index, and a demodulator coupled to the signal processor so as to receive and demodulate the second signal. In another embodiment, a method comprises the steps of providing a first signal having modulation representing information and having a first modulation index; generating, in response to the first signal, a second signal having modulation representing the information and having a second modulation index different from the first modulation index; and demodulating the second signal.

REFERENCES:
patent: 5539776 (1996-07-01), Subramanian
patent: 5781588 (1998-07-01), Abe et al.
patent: 6198908 (2001-03-01), Grenabo
patent: 6873663 (2005-03-01), Shipton
patent: 2003/0095201 (2003-05-01), Devaney et al.

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