New technology designed to boost LTE uplink speeds

UK-based Cambridge Consultants said it has developed a receiver technology that significantly improves the uplink performance of LTE networks without any alterations to devices.

The company claims its Dual-domain Uplink Equaliser for LTE (DUEL) receive technology uses what the company calls "unique and highly complex" algorithms to use properties of the LTE uplink signal to reconstruct what was transmitted with higher fidelity than a conventional text-book receiver. As a result it works well even when the signals received by each base station antenna are highly correlated, the company said.

Monty Barlow, group leader for DSP at Cambridge Consultants, explained: "There were two key challenges that we faced in designing a better receiver. Firstly, we needed to understand the information within the uplink signal that could be used to reconstruct what we received more accurately, which in itself was a mammoth mathematical challenge. Secondly, we needed to find a way to reduce the processing complexity so that it could be implemented within sensible resources. The outcome is that DUEL can be deployed on any base-station baseband platform, including DSP, FPGA and even ASIC."

Tim Fowler, commercial director in Cambridge Consultants' wireless division, said that while download speeds have been a primary focus, he believes the popularity of services such as social networking and video sharing will create a demand for better uplink performance. "We believe that this development fills a critical gap in the technology and will benefit both operators and end users," he said.

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