QUALCOMM developed technology a few years ago that added diversity receive antennas for handsets (rx only). This effectively doubles the forward link capacity. The phenomenon of receive diversity reception is not new, or particularly novel any more and has been standard fare for decades....on the base station side that is. This development is for the handset, more difficult - but now a reality. Here's the WSJ story on it (registration required...but not here)

The photo on the right (courtesy this page from Dan Bricklin's essay on cell phone towers) shows the sets of three antennas that are ubiquitous with cell towers. Two antennas are for diversity receive inputs (RX1/RX2) and the third is the transmit antenna. Nowadays one antenna can serve the same purpose using cross polarization internal to the antenna plastic housing rather than two RX antennas spatially separated by 10+ feet.