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Optimal Modulation for Known Interference
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-7926-5081
KTH, School of Electrical Engineering (EES), Communication Theory.
2008 (English)In: IEEE Transactions on Communications, ISSN 0090-6778, E-ISSN 1558-0857, Vol. 56, no 11, 1892-1899 p.Article in journal (Refereed) Published
Abstract [en]

We present a symbol-by-symbol approach to the problem of canceling known interference at the transmitter in a communication system. In the envisioned system, the modulator maps an information symbol (taken from a finite alphabet) and an interference symbol (from the complex field) onto a transmitted constellation point. Our scheme is based on joint optimization of a modulator and demodulator, subject to a constraint on the average transmit power. The demodulator picks the information symbol (as a function of the received symbol) that minimizes the average error probability. We emphasize that our focus is on transmission in a single (complex) dimension, and hence the proposed technique is a "modulation" rather than a "coding" scheme. We illustrate that the new scheme outperforms Tomlinson-Harashima precoding, which is a classical but suboptimal solution to the one-dimensional known-interference precoding problem. In our simulations, the new approach is able to perform close to the no-interference bound.

Place, publisher, year, edition, pages
IEEE Communications Society, 2008. Vol. 56, no 11, 1892-1899 p.
Keyword [en]
Costa precoding, Modulation, dirty paper coding, interference cancellation, joint design
National Category
URN: urn:nbn:se:kth:diva-17994DOI: 10.1109/tcomm.2008.060382ISI: 000261076800018ScopusID: 2-s2.0-57449092669OAI: diva2:336039
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2012-03-20Bibliographically approved

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Skoglund, MikaelLarsson, Erik G.
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