Discrete rate spectral efficiency improvement by scheme switching for MIMO systems
2008 (English)In: IEEE International Conference on Communications, ISSN 1550-3607, 3998-4002 p.Article in journal (Refereed) Published
Adaptive modulation scheme has been widely used in multiple-input multiple-output (MIMO) systems to enhance spectral efficiency while maintaining the bit error rate (BER) under a target level. We consider two MIMO schemes, orthogonal space-time block codes (OSTBC) and spatial multiplexing with zero-forcing receiver (SM-ZF), that apply adaptive modulation scheme and derive closed-form expressions of the average spectral efficiency and BER. Based on the closed-form expression of spectral efficiency, a low complexity switching method is utilized to obtain high spectral efficiency gain over an adaptive system using a single scheme.
Place, publisher, year, edition, pages
2008. 3998-4002 p.
OSTBC; ZF; adaptive modulation; CSIT
IdentifiersURN: urn:nbn:se:kth:diva-9794DOI: 10.1109/ICC.2008.751ISI: 000259505002241ScopusID: 2-s2.0-51249106622OAI: oai:DiVA.org:kth-9794DiVA: diva2:133034
QC 201008122009-01-072009-01-072010-08-12Bibliographically approved