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New TI Power Amplifier Digital Pre-Processor Chip Dramatically Cuts Wireless Base Station Costs

Crest Factor Reduction Processor Significantly Improves Power Amplifier Efficiency

Feb 14, 2005

CANNES, France (February 15, 2005) - Texas Instruments Incorporated (TI) (NYSE: TXN) today announced the new GC1115 crest factor reduction (CFR) processor designed to significantly increase the efficiency of base station power amplifiers - the highest-cost component in cellular base station systems. The GC1115 CFR chip limits signal peaks, driving down the peak-to-average ratio (PAR) of multi-user, multi-carrier 3G signals, allowing cellular base station manufacturers to purchase less expensive power amplifiers.
TI's new CFR processor meets all of the signal quality requirements for 3G signals at output PARs of less than 6 decibels (dB). With this device, in-band peak code domain error (PCDE) and composite error vector magnitude (cEVM) metrics are kept well within 3GPP UMTS standards for signal bandwidths up to 20 MHz. Similarly, in-band quality metrics are within 3GPP2 standards at 6 dB PAR for CDMA signals. TI's GC1115 can be programmed for a variety of carrier configurations so base station and power amplifier manufacturers retain maximum flexibility for 3G air interface support. The GC1115 receives its input from a digital up-converter (such as TI's GC5016), processes the data based on user-programmed settings via a 16-bit control port, and provides its output to a digital-to-analog converter (such as TI's DAC5687).
"The introduction of the GC1115 CFR processor broadens TI's product offerings by providing 3G base station customers with the ability to lower both capital and operating costs," said David Briggs, manager of TI's Wireless Infrastructure Analog Products Group. "These savings enable infrastructure customers to focus development dollars towards enhancing their service offerings."

Enhancing TI´s Cellular Transmit Chain

The GC1115 complements TI´s complete offering of wireless infrastructure components for the cellular transmit signal chain, including TI´s digital signal processors (DSPs), high-performance digital-to-analog converters (DACs), and digital up-converters (DUCs). Expanding the industry´s broadest portfolio of wireless infrastructure optimized analog and DSP products, TI today also introduced two new high-performance, low-power analog and DSP products -- the DAC5687 digital-to-analog converter and the TMS320TCI6482 DSP.

Design Support

A GC1115 CFR evaluation module (EVM) daughter card is available to developers for use with TI´s GC101EVM evaluation system. Example software is also included to ease the design process. The software provides GC1115 configuration examples and demonstrates how to initialize and to operate the GC1115 for a variety of single and multi-carrier 3G configurations. 

Pricing and Availability

Samples of the GC1115 CFR are available now. Production models will be available in March 2005 and may be purchased for US $35 (1K). All products and evaluation kits may be purchased at www.ti.com/gc1115cfrpr.