Understanding the effects of carrier frequency difference in concurrent transmission

Authors:
Yasutaka Yamashita;Yukou Tashiro;Makoto Suzuki;Yoshihiro Hase;Hiroyuki Morikawa
Affiliations:
The University of Tokyo;The University of Tokyo;The University of Tokyo;The University of Tokyo;The University of Tokyo
Venue:
Proceedings of the 11th ACM Conference on Embedded Networked Sensor Systems
Year:
2013

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Abstract

This paper presents how carrier frequency differences among transmitters affect concurrent transmission in wireless sensor networks. The carrier frequency differences cause two problems: reverse phase rotation and signal level fluctuations. The effects of these problems depend on modulation schemes. The demonstration shows these problems with moving images of superposed baseband signal and constellation transmitted from 1-6 nodes concurrently.