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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.

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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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Tuesday, June 03, 2008 in ApplicationsBusiness  | Permalink |  Comments (0)


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