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Title:
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A mixed-signal GFSK demodulator based on multi-threshold linear phase quantization.
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Author:
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Han, Dong.; Zheng, Yuanjin.
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Copyright year:
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2009 |
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Abstract:
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An ultralow-power Gaussian frequency-shift keying
(GFSK) demodulator with large tolerance for process variations
and wide coverage of data rate for low-intermediate-frequency
(low-IF) wireless receivers is presented. A novel multithreshold
linear phase quantization technique is proposed to improve the
demodulator sensitivity and relax the tradeoff between the selection
of the IF and the data rate. A dynamic threshold slicer is
employed to efficiently overcome the dc drifts caused by the input
frequency offset. The demodulator achieves 490-mV input dc offset
cancellation, 800-kHz frequency offset tolerance, and data rate
coverage from 100 kb/s to 2 Mb/s. The measured signal-to-noise
ratio (SNR) is 16.0 dB for a 0.1% bit error rate (BER) and a
0.25 modulation index. The demodulator has been fabricated in a
0.18-μm complimentary metal–oxide–semiconductor process with
only 0.14-mm2 active area and 450-μA current drawn from a
1.8-V power supply. |
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Subject:
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DRNTU::Engineering::Electrical and electronic engineering. |
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Type:
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Journal Article |
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Series/ Journal Title:
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IEEE transactions on circuits and systems—II |
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School:
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School of Electrical and Electronic Engineering |
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Rights:
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© 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. http://www.ieee.org/portal/site This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. |
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Version:
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Published version |
