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CDMA2000 transceiver chip to pack GPS, receive diversity

San Diego, Calif.—Many a cellular developer’s eyes focus on wireless components vendor Qualcomm, Inc . to see what it’s pre-announcing.

Qualcomm is about to roll out a single-chip CDMA2000 CDMA2000 (Code Division Multiple Access) RF transceiver that’s distinguished by its integrated receive diversity and simultaneous-GPS ((Global Positioning System) satellite capability.

Dubbed the RTR6500 , the transceiver's integration of receive diversity is expected to improve network capacity. What's more, its integrated support for simultaneous-GPS looks like it will provide a cost-effective way to meet the demand for location services.

Multi-Band Support

When it becomes available later this year, the RTR6500 transceiver will support designs for the 800-MHz cellular band (Classes 0 and 3), the 1.8-GHz KPCS band, and the 1.9-GHz PCS band (including Band Class 14). It will also lend itself to designers crafting cellphones for the 2.1-GHz IMT band.

The RTR6500 transceiver will feature Qualcomm's so-called IntelliCeiver power management. IntelliCeiver throttles power dynamically, reducing dissipation in order to increase overall talk time and standby time. The IntelliCeiver feature monitors the signal environment and continuously provides power optimization by reducing power when higher power isn’t needed.

The RTR6500, in conjunction with Qualcomm’s predecessor RTR6285 UMTS (Universal Mobile Telecommunications System) transceiver, shapes up to let handset makers deliver both CDMA2000 and UMTS handsets featuring slim form-factors.

Receive Diversity

The RTR6500’s receive diversity capability promises increases of up to 50% in network capacity, and up to 100% in average CDMA2000 1xEV-DO (Evolution-Data Only) service throughput at the cell edge.

Similarly, the transceiver's integration of GPS shapes up to support cost-effective location and emergency services. The GPS hooks largely eliminate the cost of expensive discrete components to support GPS reception.

The RTR6500 transceiver is implemented in a 0.18-µm CMOS fab process. Its design and topology also promises to reduce handset BOM (bill-of-materials) costs by eliminating external passive components, such as SAW (surface acoustic wave) filters. The device comes in an 8-mm x 8-mm QFN package.

Sampling is scheduled for the fourth quarter of the year as part of Qualcomm’s Mobile Station Modem MSM6800 and MSM7500 chipsets.

Unfortunately, that's about all that Qualcomm is revealing at this time. There's no datasheet available on its Web site.

You can try to get more details by contacting Qualcomm, Inc., 5775 Morehouse Dr., San Diego, Calif. 92121. Phone: 858- 587-1121. Fax: 858-658-2100

Qualcomm , 858-587-1121, www.cdmatech.com/rtr6500

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