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Technology Stocks : Qualcomm Incorporated (QCOM) -- Ignore unavailable to you. Want to Upgrade?

To: Drew Williams who wrote (31266)	5/28/1999 7:10:00 PM
From: Robert	Respond to of 152472

Qualcomm, DSP Communications show latest CDMA chip sets By Loring Wirbel EE Times (05/27/99, 12:03 p.m. EDT) eet.com SAN DIEGO — Pushing aside remaining patent-pool and modulation issues for 3G standardization, Qualcomm Inc's CDMA technologies group has announced a next-generation Mobile Station Modem 5000 chip set for handsets and a Cell Site Modem 5000 chip set for basestations, both of which Qualcomm calls "3G compatible." The chip sets follow the spreading-rate format proposed by the cdma2000 Phase One proposal, though that does not insure universal compatibility with UMTS-2000 standards. DSP Communications Inc. (Cupertino, Calif.), meanwhile, has opted for a new generation of CDMA chip set. The company's D5431 WorldCDMA set offers data rates to 115 kbits/second, but the company only claims it is compatible with IS-95B, and future IS-95C and cdma2000 standards. Qualcomm CDMA vice president of marketing Johan Lodenius said that the Qualcomm Mobile Station Modem chip set exceeds the 144 kbits/s data rates specified by the International Telecommunication Union, and offers data speeds of 153.6 kbits/s on both forward and reverse links. Capacity improvements over traditional CDMA networks also can be realized by 800-Hz forward power control, and by enhanced modulation methods, such as quasi-orthogonal functions for increasing the number of forward channels. The Voice V1 software for Mobile Station chip set handles all voice code algorithms, including EVRC, IS-96A and PureVoice. The Packet Data P1 service extends to 153.6 kbits/s through the use of primary and supplemental channels, while a separate quick-paging channel can be utilized for pages. Use of the paging channel allows handset standby time to be increased by up to 50 percent, Qualcomm said. The primary baseband chip is packaged in 196-pin BGA, and can interface to existing RF handset chips, such as the Q5500 IF receive AGC amp, the Q5312 analog baseband processor, as well as with IFR3000 and IFT30000 IF-to-baseband converters. Qualcomm's equivalent baseband offering for basestations is the single-chip CSM5000, which supports 32 user channels. It can support forward and reverse data links as fast as 307.2 kbits/s. The chip can support six antenna sectors, which allows the support of six individual transmit antennas and 12 receive antennas. In addition to traditional forward error codes, the CSM5000 supports selective use of convolutional codes and turbo-codes on a per-user basis. The multiple channels are controlled through an on-chip ARM-7 processor, which is responsible for handling such reverse-link tasks as multipath tracking and finger assignment. At DSP Communications, the latest D5431 WorldCDMA chip set supports a twin-finger function for rake receiving, thus allowing sub-chip time tracking. The processor supports multiple vocoders, including 8-kbit QCELP, 13-kbit QCELP, and EVRC. It also supports echo cancellers for hands-free automotive applications. DSP Communication's D5431 is based on the ARM7TDMI microcontroller and utilizes multiple sleep controllers to extend standby time to 350 hours. DSP Communications also supplies an RF/IF unit, audio codec, and software for voice processing and advanced services. Robert.