FDD and TDD Single-User Capacity Bounds

Konferenz: SCC 2013 - 9th International ITG Conference on Systems, Communication and Coding
21.01.2013 - 24.01.2013 in München, Deutschland

Tagungsband: SCC 2013

Seiten: 6Sprache: EnglischTyp: PDF

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Casta˜neda, Mario H.; Nossek, Josef A. (Institute for Circuit Theory and Signal Processing, Technische Universität München, Munich, Germany)

Multiple antennas increase significantly the capacity of wireless links under the assumption of perfect channel state information (CSI). In practice, however, in time division duplex (TDD) or frequency division duplex (FDD) systems, the available CSI is obtained with training and/or limited feedback and hence, is not perfect. In this work, we derive tight capacity bounds for the uplink and downlink of TDD/FDD systems with multiple antennas at the base station and a single-antenna user. We also present a performance comparison between the two systems based on the achievable rates and discuss further issues for a relevant comparison.