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ICASSP
2008
IEEE

Impact of channel estimation error on performance of adaptive MIMO systems

8 years 9 months ago
Impact of channel estimation error on performance of adaptive MIMO systems
Adaptive modulation scheme has been widely used in multipleinput 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.
Jinliang Huang, Svante Signell
Added 30 May 2010
Updated 30 May 2010
Type Conference
Year 2008
Where ICASSP
Authors Jinliang Huang, Svante Signell
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