DECAFE – Digitally Enhanced and Calibrated Front Ends

Description of research

Wireless communication is becoming pervasive. With the explosive growth in available wireless standards, next generation wireless transceivers are required to have multi-mode capabilities in order to meet cost, size and time-to-market demands.

Multi-mode transceivers suffer from co-existence problems that result in reduced performance when more than one transmitter and/or receiver are active at the same time. Especially when a receiver is trying to receive a weak signal and at the same time at least one other transmitter is active, this can result in high linearity requirements to prevent desensitization through blocking. The 1-dB compression point and intermodulation intercept points for multi-mode transceiver combinations that are expected to be needed in the foreseeable future can be as much as 20dB higher than in current single-mode radios. Obviously, increasing power dissipation of a transceiver IC - via classical scaling - by a factor of 100 is not acceptable. Therefore, another solution is required.

This project aims at a major reduction of power dissipation through such an optimization across the RF/baseband border line. In particular, RF circuits will be modified for reduced power at the cost of increased tolerances and distortions. Concurrently, these tolerances and distortions will be compensated for, partly in RF (through calibration and/or adaptation) and partly in baseband (through digital algorithms). Besides reduced power dissipation, such a joint design approach is expected to yield further benefits, such as smaller RF circuit size, and hence cost. Techniques developed in the project can also be applied to other low-power and high performance receivers.

Advisor(s)

prof.dr.ir. Bram Nauta

Dr. ir. Ronan van der Zee

Duration

1 feb 2009 – 1 feb 2013

Project

Digitally Enhanced and Calibrated Front Ends - Decafe

Funding institution

STW

Strategic Research Orientation

Wireless and Sensor Systems

Links to relevant web pages:

http://icd.ewi.utwente.nl/

Pictures

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Home CTIT symposium 2013 About CTIT News NIRICT Research Meet the PhDs Working at CTIT Internal Information Conferences Open Calls (updated May 3, 2013) Library and Videos Knowledge Transfer Links Sitemap Search	DECAFE – Digitally Enhanced and Calibrated Front Ends Description of research Wireless communication is becoming pervasive. With the explosive growth in available wireless standards, next generation wireless transceivers are required to have multi-mode capabilities in order to meet cost, size and time-to-market demands. Multi-mode transceivers suffer from co-existence problems that result in reduced performance when more than one transmitter and/or receiver are active at the same time. Especially when a receiver is trying to receive a weak signal and at the same time at least one other transmitter is active, this can result in high linearity requirements to prevent desensitization through blocking. The 1-dB compression point and intermodulation intercept points for multi-mode transceiver combinations that are expected to be needed in the foreseeable future can be as much as 20dB higher than in current single-mode radios. Obviously, increasing power dissipation of a transceiver IC - via classical scaling - by a factor of 100 is not acceptable. Therefore, another solution is required. This project aims at a major reduction of power dissipation through such an optimization across the RF/baseband border line. In particular, RF circuits will be modified for reduced power at the cost of increased tolerances and distortions. Concurrently, these tolerances and distortions will be compensated for, partly in RF (through calibration and/or adaptation) and partly in baseband (through digital algorithms). Besides reduced power dissipation, such a joint design approach is expected to yield further benefits, such as smaller RF circuit size, and hence cost. Techniques developed in the project can also be applied to other low-power and high performance receivers. Advisor(s) prof.dr.ir. Bram Nauta Dr. ir. Ronan van der Zee Duration 1 feb 2009 – 1 feb 2013 Project Digitally Enhanced and Calibrated Front Ends - Decafe Funding institution STW Strategic Research Orientation Wireless and Sensor Systems Links to relevant web pages: http://icd.ewi.utwente.nl/ Pictures