A 280-MHz CMOS Intra-Symbol Intermittent RF Front End for Adaptive Power Reduction of Wireless Receivers According to Received-Signal Intensity in Sensor Networks
In: IEICE transactions on electronics, Jg. 96 (2013), Heft 1, S. 93-101
academicJournal
- print, 22 ref
Zugriff:
To reduce the power dissipation of the receiver in accordance with the intensity of the received signal, we developed the first intra-symbol intermittent (ISI) radio-frequency (RF) front end with 0.35-μm CMOS technology. In the demodulation mechanism, the RF output of the low-noise amplifier (LNA) is down-converted to an intermediate frequency (IF) by the mixer, and the LNA and mixer operate synchronously and intermittently within the length of a single symbol. Because the time-averaged power consumption is proportional to the operating time, the demodulation can be performed with low power by making the total operating time short. We experimentally demonstrate that demodulation (BPSK: 9.6 kbps) is properly achieved with the operating-time ratio of 12%. This ISI operation of the RF front end is enabled by a newly devised fast-transition LNA and mixer. A theoretical analysis of aliasing noise reveals that RF ISI operation is more useful than current-control with continuous operation and that an operating-time ratio of 10% is optimal.
Titel: |
A 280-MHz CMOS Intra-Symbol Intermittent RF Front End for Adaptive Power Reduction of Wireless Receivers According to Received-Signal Intensity in Sensor Networks
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Autor/in / Beteiligte Person: | NAKAMURA, Mitsuo ; UGAJIN, Mamoru ; HARADA, Mitsuru |
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Zeitschrift: | IEICE transactions on electronics, Jg. 96 (2013), Heft 1, S. 93-101 |
Veröffentlichung: | Oxford: Oxford University Press, 2013 |
Medientyp: | academicJournal |
Umfang: | print, 22 ref |
ISSN: | 0916-8524 (print) |
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