| US 7,603,099 B2 | ||
| Direct-conversion receiver system and method with quadrature balancing and DC offset removal | ||
| Lawrence J. Malone, Carlsbad, Calif. (US); and Lon W. Christensen, San Diego, Calif. (US) | ||
| Assigned to Spreadtrum Communications Inc., Grand Cayman (Cayman Islands) | ||
| Filed on Mar. 10, 2006, as Appl. No. 11/373,396. | ||
| Application 11/373396 is a continuation of application No. 10/807208, filed on Mar. 22, 2004, granted, now 7,031,688. | ||
| Claims priority of provisional application 60/456510, filed on Mar. 24, 2003. | ||
| Prior Publication US 2006/0154639 A1, Jul. 13, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04B 1/30 (2006.01) | ||
| U.S. Cl. 455—319 [455/323] | 22 Claims |
| 1. A method of processing a signal, the method comprising:
receiving the signal; and
mixing the signal with a first phase interleaved Local Oscillator (LO) signal to generate a frequency downconverted first
phase interleaved signal, the downconverted first phase interleaved signal interleaving at least downconverted in-phase and
quadrature signal;
mixing the signal with a second phase interleaved LO signal to generate a second phase interleaved signal, the second phase
interleaved signal interleaving at least downconverted in-phase and quadrature signals; and
maintaining a phase offset of the first phase interleaved LO signal relative to the second phase interleaved LO signal.
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