Impact of channel estimation error on performance of adaptive MIMO systems
2008 (English)In: Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing, ISSN 1520-6149, 2865-2868 p.Article in journal (Refereed) Published
Adaptive modulation scheme has been widely used in multiple-input multiple-output (MIMO) systems to enhance the spectral efficiency while maintaining the bit-error-rate (BER) under a target level. In this work, we investigate the performance of adaptive modulation in the presence of imperfect channel estimation and the impact of estimation noise on the spectral efficiency. The closed-form expressions for the average spectral efficiency are derived. Two MIMO schemes are considered, i.e., orthogonal space-time block codes (OSTBC) and spatial multiplexing with zero-forcing receiver (SM-ZF), and a low complexity method to enable the transmitter to switch between OSTBC and SM-ZF is utilized to achieve higher spectral efficiency than adaptive OSTBC and adaptive SM-ZF.
Place, publisher, year, edition, pages
2008. 2865-2868 p.
MIMO systems; communication system operations and management; communication system performance
IdentifiersURN: urn:nbn:se:kth:diva-9796DOI: 10.1109/ICASSP.2008.4518247ISI: 000257456702039ScopusID: 2-s2.0-51449096603OAI: oai:DiVA.org:kth-9796DiVA: diva2:133046
QC 201008122009-01-072009-01-072010-08-12Bibliographically approved