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Sequans Ups Uplink Performance with WiMAX Expo Taiwan Announcement
Sequans announces uplink MIMO support across entire 802.16e-2005 chipset family, increasing functionality and cost-savings.
Sequans Communications announced new WiMAX
chipset capabilities this week at the opening of the WiMAX Expo in Taiwan. The
provider enabled a second transmitter in its 802.16e-2005 silicon to boost
performance using uplink MIMO. The additional transmitter could lead to
infrastructure cost-savings of up to 50 percent.
Sequans is enabling the second transmitter in its mobile station semiconductor
products to boost Mobile WiMAX system performance. The company claims it is the
only WiMAX provider offering this capability across its entire product family.
As a result, smart antenna techniques applying MIMO in the uplink (device to
infrastructure base station) are now possible in addition to the downlink. "The
benefits of uplink MIMO cannot be ignored," said Georges Karam, Sequans CEO. "WIMAX
network operators' recent experiences show that, as in other wireless networks,
coverage is limited by the uplink. With the diversity introduced by uplink MIMO,
up to a 50 percent reduction in infrastructure costs can be achieved with very
little incremental cost to the mobile device and no incremental cost at the base
station."
The benefits of uplink MIMO can be introduced to any mobile WiMAX network
through Sequans' use of a technique called "tile switched diversity" (TSD),
regardless of the base station used. Further gains can be achieved if an uplink
MIMO receiver is also implemented at the base station. The benefits of uplink
MIMO can be applied either to extend the cell coverage or reduce the power
consumption and cost of the mobile device. With uplink MIMO, the resultant
diversity and combining gains can nearly double the cell coverage area.
Uplink MIMO is implemented in all of Sequans' mobile WIMAX solutions, including
the SQN1130 baseband mobile station chip, the SQN1140 and SQN1145 mobile station
RF chips, the SQN1170 integrated baseband/RF/SDRAM mobile station chip, and the
SQN2130 baseband base station chip.
By Jeff Orr
ORR Technology, LLC
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