Sequoia Communications’ SEQ7400 HEDGE Transceiver Supports
TD-SCDMA, HSUPA, S-Band, and GMR Specifications
Company’s patented polar architecture enables “SDR-like” flexibility
without cost or power tradeoff
SAN DIEGO and BARCELONA, SPAIN –
February 11, 2008 – Sequoia Communications, the RF semiconductor
company setting new benchmarks in multi-mode design and integration,
today announced at Mobile World Congress that its SEQ7400 HEDGE transceiver
has been verified to support HSUPA, TD-SCDMA, S-Band and GMR satellite
specifications via extensive testing, making it the first true “flexible
radio.” Originally introduced in May 2007, the SEQ7400 is based on the
company’s patented FullSpectratm architecture, which includes the only
transmitter in the industry to use polar modulation in all modes. Sequoia
Communications’ all-polar architecture enables this flexibility without
the sub-optimal cost and power consumption that plagues traditional
software-defined radio (SDR) approaches.
Sequoia Communications
will demonstrate the SEQ7400, operating in all of these modes, in the
company’s booth (Hall 2, Stand 2F69) at Mobile World Congress in Barcelona,
Spain, held February 11-14, 2008.
The Polar Advantage
The SEQ7400, the industry’s most highly integrated single-chip HEDGE
transceiver, has been well received in the market and is currently being
integrated into several baseband reference platforms targeting 3G phones
later this year. The key to its ability to easily support additional
modes, like TD-SCDMA, lies in the all-polar transmitter which uses a
single transmit path for all modes.
“Our continued leadership
and innovation in polar modulation provides the best combination of
flexibility and cost in the industry, finally delivering a flexible
radio that can meet the strict cost and power constraints of wireless
handsets,” said Dave Shepard, CEO of Sequoia Communications.
The single-path polar architecture for the analog portion of the radio
gives it the most efficient size and power consumption possible. The
company then added a very flexible, all-digital programming interface
that is easily modified in software to accommodate additional modes
and frequency bands. This combination of analog and digital approaches
provides the most optimal tradeoff between flexibility and the key handset
metrics.
“Our patented polar architecture is fundamental to enabling
the ‘flexible radio’ concept,” said John Groe, CTO and founder of Sequoia
Communications. “It uniquely provides the flexibility to process both
narrow-band and wide-band modulation schemes using a single radio.”
Flexible Radio vs. SDR
Attempts have been
made to develop a software-defined radio that can be programmed in software
to handle various modes. To date, SDR has failed to meet the stringent
cost and power consumption requirements for wireless handsets. In contrast,
the flexible radio concept utilizes a single radio architecture capable
of supporting all modulation types using customized digital circuitry.
This provides a solution that can be easily upgraded to support next
generation standards with minor changes in the digital design.
Test results prove that the SEQ7400 meets the most difficult of
cellular specifications for WCDMA and HSDPA, and as a result is proven
to be the best single-chip HEDGE solution on the market. Further testing
has proven that the SEQ7400 can be extended to a variety of other applications
without any modifications to the chip itself. It needs only to be re-programmed
and then tested to the new specifications. The SEQ7400 is the first
true “flexible radio.”
About Sequoia Communications
Sequoia Communications is a fabless semiconductor company focusing
on multimode RF solutions. The company uniquely integrates different
modes using a common architecture on a single chip enabling effective
communications across multiple wireless standards including GSM, GPRS,
EDGE, WCDMA, HSDPA, HSUPA, TD-SCDMA, LTE and more. Single-chip RF transceivers
developed using Sequoia Communications’ innovative approach and FullSpectratm
architecture will set new industry benchmarks in chip cost, component
count, PCB size and power consumption. Sequoia Communications is headquartered
in San Diego, CA. For more information, visit:
www.sequoiacommunications.com.
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