Proceedings ArticleDOI
Analysis of MIMO Beamforming with Channel Response Variations Over the Frame Interval
E. Martos-Naya,Jose F. Paris,Unai Fernandez-Plazaola,Andrea Goldsmith +3 more
- pp 1597-1601
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TLDR
The impact of imperfect channel prediction on bit error probability (BEP) is analyzed in Rayleigh fading, taking into account the channel response variations over the frame interval, and results indicate that the BEP performance degrades on the order of 1.5 dB due to channel variations.Abstract:
Important throughput improvements in multiple- input multiple-output (MIMO) fading channels can be obtained by merging beamforming at the transmitter and maximal ratio combining (MRC) at the receiver. However, to attain these performance gains it is important to obtain accurate channel state information (CSI). For this purpose a channel estimation technique is used at the receiver: channel prediction to feed back to the transmitter for beamforming, and channel interpolation for MRC at the receiver. In this paper, the impact of imperfect channel prediction on bit error probability (BEP) is analyzed in Rayleigh fading, taking into account the channel response variations over the frame interval. An exact closed-form expression for BEP is obtained, and we evaluate this expression assuming both time-variant and time-invariant channel models. These results indicate that the BEP performance degrades on the order of 1.5 dB due to channel variations.read more
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Journal ArticleDOI
Performance of Dualbeam MIMO for Millimeter Wave Indoor Communication Systems
S Kirthiga,M Jayakumar +1 more
TL;DR: The dual beam MIMO using TSV is found to perform better compared to dualbeam MIMo using Rayleigh in the low Energy per bit to Noise level and an improved diversity order is achieved.
Journal ArticleDOI
Adaptive Modulation for MIMO Systems with Channel Prediction Errors
TL;DR: In this paper, exact closed-form expressions for the conditional and average bit error rate (BER) for both fixed and adaptive modulation are derived and a rate adaptation policy is designed that optimally adapts antenna use between beamforming and spatial multiplexing.
Journal ArticleDOI
Performance Studies and Review of Millimeter Wave MIMO Beamforming at 60 GHz
S Kirthiga,M Jayakumar +1 more
TL;DR: In this article, extensive research work carried out by us in MMW MIMO at 60 GHz covering aspects related to fixed-beam, adaptive beam and multibeam beamformers addressing line of sight and non-line-of-sight channel for MMW 60 GHz system is reviewed.
Proceedings ArticleDOI
Asymptotic BER Analysis for MIMO-BICM with Zero-Forcing Detectors Assuming Imperfect CSI
TL;DR: The asymptotic bit error rate (BER) for multiple-input multiple-output bit-interleaved coded modulation (MIMO-BICM) with linear zero-forcing receivers for a temporally correlated flat Rayleigh fading channel is derived and the deterioration due to imperfect channel state information (CSI) can be represented by a signal-to-noise ratio (SNR) degradation.
Journal Article
SMART GRID TECHNOLOGIES Performance Studies and Review of Millimeter Wave MIMO Beamforming at 60 GHz
TL;DR: Examination of aspects related to MIMO fixed-beam, adaptive beam and multibeam beamformers addressing line- of-sight and non-line-of-sight channel for MMW 60 GHz system is reviewed.
References
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A table of integrals
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