New Baseband ASIC To Cut Power Consumption of Dual-Mode Terminals
February 23, 2003
Innovics Wireless today announced a new diversity processing solution
for next-generation wireless systems, which will significantly reduce
the power consumed by dual mode 2.5/3G terminals. By enabling a
significant increase in the rate of data download, the Innovics
IW7520 reduces the time spent downloading and thereby increases
terminal battery life.
Implemented in a small silicon area, the Innovics IW7520 device
has a low-power architecture that is compliant with 3GPP UMTS (WCDMA),
but also compatible with GPRS and GSM standards. This provides the
terminal user with access to existing 2G and 2.5G services as well
as 3G networks.
Like Innovics' existing 3G-only solution, the new IW7520 hardware
is capable of offering up to 2Mbit/s downloads and 768kbit/s uploads
via a 3G network. The new device also supports hard hand-off between
UMTS FDD and GSM cells, and complies with GSM Phase 2+ and GPRS
multi-slot class 12 (5 slots).
The IW7520 offers a full range of GSM standard vocoders, SMS services,
EMS messaging and circuit-switched and packet switched data - including
fax.
The IW7520 uses Innovics' patented terminal-based diversity processing
technology to increase the average data rate available per user
in a cellular system. Despite its small size, this low-cost, multi-mode,
multi-band baseband processor contains approximately 3 times the
processing power of other solutions.
In a typical 3G mobile terminal, diversity processing can increase
the signal to noise ratio (SNR) at the mobile terminal by 7dB on
average. This gain enables reliable broadband data connections at
the promised data rates (384kbit/s to 2Mbit/s) throughout the entire
3G cell. The effective coverage of a cell is dramatically extended
and capacity can be increased by up to a factor of four, reducing
the need for 3G cells and infrastructure costs by up to 50%.
Power-efficiency in the IW7520 is enhanced by the use of clock
gating and an intelligent adaptive algorithm, which controls the
power mode (active/sleep/shut-down) of different processing blocks
according to prevailing channel conditions and the required quality
of service. The device also uses dynamic voltage scaling (DVS) -
varying the supply voltage and clock frequency to minimise power
consumption.
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3G Motorola A920
