On the MMSE criterion for space-time coded signaling in the presence of unknown interference

Authors:
Tad Matsumoto;Aihua Hong
Affiliations:
Japan Advanced Institute of Science and Technology, Ishikawa, Japan and Center for Wireless Communication, University of Oulu, Oulu, Finland;Institute for Information Technology, Ilmenau University of Technology, Ilmenau, Germany
Venue:
Research Letters in Communications - Regular issue
Year:
2007

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Abstract

The primary goal of this letter is to provide comparative assessments to the two cases where different criteria are used in joint over antenna minimum mean squared error (JA-MMSE) spatial filtering for space-time coded systems in the presence of unknown interference. It is shown that additional constraints to preserve the space-time coded signal structure in JA-MMSE spatial filtering place floor in bit error rate (BER) performance, while imposing no additional constraint places no error floor.