The Michigan Engineer News Center

Work in software defined radio earns Best Paper Award at ICRO-41

The winning paper describes a commercial prototype processor that targets wireless baseband processing for the next generation of cellular phones.| Short Read
EnlargeScott Mahlke, Trevor Mudge, Mark Woh, Sangwon Seo
IMAGE:  Scott Mahlke, Trevor Mudge, Mark Woh, Sangwon Seo

EECS graduate students Mark Woh and Sangwon Seo, and Professors Scott Mahlke and Trevor Mudge won the Best Paper Award at the 41st International Symposium on Microarchitecture for their paper entitled, “From SODA to Scotch: The Evolution of a Wireless Baseband Processor.”

This work is part of an ongoing collaboration between ARM Ltd., Arizona State University, and U-M on designing the next generation mobile computer systems. Co-authors of this paper are former U-M graduate student Yuan Lin now at Cavium Networks, Prof. Chaitali Chakrabarti at Arizona State University, and ARM Ltd. research team members Richard Bruce, Danny Kershaw, Alastair Reid, Mladen Wilder, and Krisztian Flautner.

This paper describes a commercial prototype processor that targets wireless baseband processing for the next generation of cellular phones. Current mobile computer systems consist of a variety of general-purpose processors, digital signal processors, and hardwired accelerators to deliver high-performance signal processing on sub-Watt power budgets needed for cell phones.  Ardbeg (named after a brand Scotch Whisky) takes a different approach by providing a fully programmable multicore system that delivers a cost effective and flexible solution by executing a wide variety of wireless protocols in software – GSM in Europe, CDMA in the USA and some parts of Asia, and 802.11 in coffee shops.  High-performance is achieved by providing a 512-bit 32-lane single-instruction multiple-data (SIMD) datapath combined with an efficient SIMD shuffle network to permute data as the core execution engine on each processor.  This paper shows the architectural evolution of going from a research design previously done at U-M in 2006 code named SODA to the Ardbeg commercial prototype, including the goals, tradeoffs, and final design choices.

Scott Mahlke, Trevor Mudge, Mark Woh, Sangwon Seo
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The electrons absorb laser light and set up “momentum combs” (the hills) spanning the energy valleys within the material (the red line). When the electrons have an energy allowed by the quantum mechanical structure of the material—and also touch the edge of the valley—they emit light. This is why some teeth of the combs are bright and some are dark. By measuring the emitted light and precisely locating its source, the research mapped out the energy valleys in a 2D crystal of tungsten diselenide. Credit: Markus Borsch, Quantum Science Theory Lab, University of Michigan.

Mapping quantum structures with light to unlock their capabilities

Rather than installing new “2D” semiconductors in devices to see what they can do, this new method puts them through their paces with lasers and light detectors. | Medium Read