Very high data rate up-conversion in FPGAs

Details Very high data rate up-conversion in FPGAs Very high data rate up-conversion in FPGAs

2004-03-04

2008-07-29

Ahn, Sam K (Department: 2611)

Pulse or digital communications

Transmitters

Angle modulation

Reexamination Certificate

active

07406134

ABSTRACT:
Methods, circuits, and apparatus for providing an RF up-converter using digital circuits. One exemplary embodiment provides an up-converter that uses multiple channels of parallel digital processing, then serializes individual bits from these channels to achieve higher frequencies. Specifically, I and Q components of a signal to be transmitted are decomposed into multiple components, each phase shifted from another. Quadrature versions of an oscillator signal are similarly decomposed and multiplied with corresponding I and Q signal components. The products are combined and serialized on a bit-by-bit basis to generate an RF signal.

REFERENCES:
patent: 5274372 (1993-12-01), Luthra et al.
patent: 5815046 (1998-09-01), Spilker et al.
patent: 6621366 (2003-09-01), Gentile
patent: 2001/0022811 (2001-09-01), Lillington
patent: 2001/0024475 (2001-09-01), Kumar
patent: 2003/0174784 (2003-09-01), Samarasooriya et al.

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