Product category: Communications ICs (Wireless)
News Release from: Texas Instruments (April 2001-March 2006) | Subject: GC1115
Edited by the Electronicstalk Editorial Team on 16 February 2005
Processor boosts basestation efficiency
The GC1115 is a crest factor reduction processor designed to significantly increase the efficiency of basestation power amplifiers - the highest-cost component in cellular basestation systems
New from Texas Instruments, the GC1115 is a crest factor reduction (CFR) processor designed to significantly increase the efficiency of basestation power amplifiers - the highest-cost component in cellular basestation systems. The GC1115 CFR chip limits signal peaks, driving down the peak-to-average ratio (PAR) of multi-user multicarrier 3G signals, allowing cellular basestation manufacturers to purchase less expensive power amplifiers.
This article was originally published on Electronicstalk on 16 February 2005 at 8.00am (UK)
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TI's new CFR processor meets all of the signal quality requirements for 3G signals at output PARs of less than 6dB.
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 20MHz.
Similarly, in-band quality metrics are within 3GPP2 standards at 6dB PAR for CDMA signals.
TI's GC1115 can be programmed for a variety of carrier configurations so basestation and power amplifier manufacturers retain maximum flexibility for 3G air interface support.
The GC1115 receives its input from a digital up-convertor (such as TI's GC5016), processes the data based on user-programmed settings via a 16bit control port, and provides its output to a digital-to-analogue convertor (such as TI's DAC5687).
'The introduction of the GC1115 CFR processor broadens TI's product offerings by providing 3G basestation customers with the ability to lower both capital and operating costs', said David Briggs, Manager of TI's Wireless Infrastructure Analogue Products Group.
'These savings enable infrastructure customers to focus development dollars towards enhancing their service offerings'.
A GC1115 CFR evaluation module (EVM) daughtercard 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 initialise and to operate the GC1115 for a variety of single and multicarrier 3G configurations.
Samples of the GC1115 CFR are available now.
Production models will be available in March 2005 and may be purchased for US $35 (1000-off).
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