On the MMSE Criterion for Space-Time Coded Signaling in the Presence of Unknown Interference

摘要

The primary goal of this letter is to provide comparative assessments to the two cases where different criteriaare 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.