| US 7,570,702 B2 | ||
| Signal generation apparatus, systems, and methods | ||
| Alan E. Waltho, San Jose, Calif. (US); and Jeffrey Schiffer, Palo Alto, Calif. (US) | ||
| Assigned to Intel Corporation, Santa Clara, Calif. (US) | ||
| Filed on Mar. 30, 2004, as Appl. No. 10/815,030. | ||
| Prior Publication US 2005/0220214 A1, Oct. 06, 2005 | ||
| Int. Cl. H04L 27/00 (2006.01) | ||
| U.S. Cl. 375—295 [375/298; 375/308] | 27 Claims |
| 1. An apparatus, including:
a digital processor to shift a digital baseband signal upward along a frequency spectrum by a selected amount of frequency
shift to provide a first elevated frequency digital baseband signal and a second elevated frequency digital baseband signal
derived from a phase-shifted version of the digital baseband signal; and
a digital mixer to receive the digital baseband signal and to provide the first elevated frequency digital baseband signal,
wherein the selected amount of frequency shift is greater than about a bandwidth of the digital baseband signal.
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