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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 FullSpectra™
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
Privately-held 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, GPS, WiMax and more. Single-chip RF transceivers developed using Sequoia Communications’ innovative approach and FullSpectra™ 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 |
