Imec and Holst Centre Present Wi-Fi HaLow Low-Power Fully Digital Polar Transmitter for IoT Applications

At this week’s IEEE International Solid-State Circuits Conference (ISSCC 2016), nanoelectronics research center imec and Holst Centre (initiated by imec and TNO) presented a 1.3nJ/b fully digital polar transmitter optimized for IoT applications and the novel IEEE 802.11ah Wi-Fi protocol, with a ten-fold power reduction as compared to state-of-the-art OFDM transmitters.

At the Consumer Electronics Show (CES 2016) in January 2016, the Wi-Fi Alliance® has introduced the HaLow (TM) designation for the new low power, long range Wi-Fi protocol IEEE802.11ah, developed by the IEEE standardization committee. This new protocol is especially optimized for Internet-of-Things applications. Compared to other IoT standards, its sub-GHz carrier frequency and mandatory modes with 1MHz/2MHz channel bandwidths allow devices to operate in a longer range with scalable data rates from 150kb/s to 2.1Mb/s. The standard uses OFDM to improve the link robustness against fading, which is important in urban environments, and to achieve a high spectral efficiency (data rate over a given bandwidth).

Imec and Holst Centre’s fully-digital polar transmitter meets the tight spectral mask and error-vector-magnitude (EVM) requirements of conventional Wi-Fi standards. The measured phase noise at 1.5MHz offset is -115dBc/Hz which is 15dB lower than the spectral mask requirement for the IEEE 802.11ah standard. At 1MHz/2MHz with 64-QAM OFDM data packets, both the far-out and close-in spectrum pass the mask with at least 4.8dB margin. The EVM is below 4.4%. The power consumption of the transmitter is as low as 7.1mW, when delivering 0dBm output power and operating from a 1V supply. This represents a 10x power reduction compared to state-of-the-art OFDM transceivers, and consequently, the prototype transmitter chip meets the stringent requirements for IoT applications.

Imec’s Intuitive internet-of-things R&D program aims at developing the building blocks for the future internet-of-things, an intuitive IoT, with sensor systems that are aware of us, our perspective and our environment and react exactly as we need or want, assisting us in an unobtrusive way. Imec’s research activities focus on the development of ultra-small, low-cost, intelligent, and ultra–low power sensors, radio chips and heterogeneous sensor networks. Interested companies are invited to join our research efforts as research partner or they can have access to the technology for further development through licensing programs.

About imec
Imec performs world-leading research in nanoelectronics. Imec leverages its scientific knowledge with the innovative power of its global partnerships in ICT, healthcare and energy. Imec delivers industry-relevant technology solutions. In a unique high-tech environment, its international top talent is committed to providing the building blocks for a better life in a sustainable society. Imec is headquartered in Leuven, Belgium, and has offices in Belgium, the Netherlands, Taiwan, USA, China, India and Japan. Its staff of about 2,200 people includes almost 700 industrial residents and guest researchers. In 2014, imec's revenue (P&L) totaled 363 million euro. Further information on imec can be found at www.imec.be. Stay up to date about what’s happening at imec with the monthly imec magazine, available as an app for iOS and Android or via the website www.imec.be/imecmagazine
Imec is a registered trademark for the activities of IMEC International (a legal entity set up under Belgian law as a "stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Flemish Government), imec the Netherlands (Stichting IMEC Nederland, part of Holst Centre which is supported by the Dutch Government), imec Taiwan (IMEC Taiwan Co.)and imec China (IMEC Microelectronics (Shanghai) Co. Ltd.) and imec India (Imec India Private Limited).

About Holst Centre
Holst Centre is an independent open-innovation R&D centre that develops generic technologies for Wireless Autonomous Transducer Solutions and for Systems-in-Foil. A key feature of Holst Centre is its partnership model with industry and academia around shared roadmaps and programs. It is this kind of cross-fertilization that enables Holst Centre to tune its scientific strategy to industrial needs.
Holst Centre was set up in 2005 by imec (Flanders, Belgium) and TNO (The Netherlands) with support from the Dutch Ministry of Economic Affairs and the Government of Flanders. It is named after Gilles Holst, a Dutch pioneer in Research and Development and first director of Philips Research.
Located on High Tech Campus Eindhoven, Holst Centre benefits from the state-of-the-art on-site facilities. Holst Centre has over 180 employees from around 28 nationalities and a commitment from more than 45 industrial partners.
Visit us at www.holstcentre.com

Contact:
imec: Hanne Degans, Press officer and external communications specialist, T: +32 16 28 17 69, Mobile : +32 486 06 51 75, hanne.degans@imec.be