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Interpolated linear precoding and space-frequency coding for MIMO-OFDM systems
2008
2008 42nd Asilomar Conference on Signals, Systems and Computers
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We investigate the design of space-frequency codes and efficient feedback-aided precoding schemes for multipleinput multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. ...
The space-frequency coded symbols are then processed with a spatial precoding matrix for each OFDM tone before transmission. ...
CLOSED-LOOP SPACE-FREQUENCY-CODED MIMO-OFDM Feedback-aided precoding can greatly improve the capacity and error performance of MIMO-OFDM systems. ...
doi:10.1109/acssc.2008.5074506
fatcat:2ija7gu5tjayzhuaeisfphuzii
Limited-Feedback Precoding for Closed-Loop Multiuser MIMO OFDM Systems with Frequency Offsets
2008
IEEE Transactions on Wireless Communications
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Linear precoding and non-linear Tomlinson-Harashima precoding (THP) are thus developed for spatially-multiplexed multiuser OFDM and orthogonal space-time block-coded (OS-TBC) OFDM. ...
Our precoders not only offer significant bit error rate (BER) improvement for spatially-multiplexed multiuser MIMO OFDM with frequency offsets, but are equally effective for both OSTBC MIMO OFDM and spatially ...
In this paper, we propose both linear precoding and nonlinear limited-feedback THP (LFB-THP) for closed-loop multiuser MIMO OFDM systems with frequency offsets. ...
doi:10.1109/t-wc.2008.060868
fatcat:wfe7hghmozcojebqxd5glngiyi
Interpolation Based Unitary Precoding for Spatial Multiplexing MIMO-OFDM With Limited Feedback
2006
IEEE Transactions on Signal Processing
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Spatial multiplexing with linear precoding is a simple technique for achieving high spectral efficiency in multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. ...
Linear precoding requires channel state information for each OFDM subcarrier, which can be achieved using feedback. ...
Strohmer (strohmer@math.ucdavis.edu) for his help in constructing sets of unitary matrices algebraically. ...
doi:10.1109/tsp.2006.881251
fatcat:bj2mbdhecnaihn3nwcm56rvq3i
A Weighted Least Squares Approach to Precoding With Pilots for MIMO-OFDM
2006
IEEE Transactions on Signal Processing
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Linear spatial precoding is a popular technique for channel adaptation where the transmitted space-time signal for each subcarrier is multiplied by a precoding matrix before transmission. ...
In this paper, we present a subspace interpolation method for designing spatial precoders for all subcarriers by using the precoders known on pilot tones. ...
For MIMO-OFDM systems the linear precoding matrix F n must be designed as a function of H n for every subcarrier. ...
doi:10.1109/tsp.2006.880241
fatcat:qfritpkhq5euvjveine7tv2gba
Reduced Feedback MIMO-OFDM Precoding and Antenna Selection
2007
IEEE Transactions on Signal Processing
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In MIMO-OFDM systems precoder matrices have to be designed for all subcarriers and the amount of feedback can get prohibitively large. ...
Transmitter precoding for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) is an effective way of leveraging the diversity gains afforded by a multiple transmit-multiple ...
In [6] - [8] the conventional linear interpolator is modified for interpolating between pilot precoders in the MRT/MRC and spatial multiplexing MIMO-OFDM systems. ...
doi:10.1109/tsp.2006.890936
fatcat:nozmzf4qgvgb3n6sui776dtj3y
Interpolation-Based Multi-Mode Precoding for MIMO-OFDM Systems with Limited Feedback
2007
IEEE Transactions on Wireless Communications
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Index Terms-Multiple-input multiple-output (MIMO), OFDM, limited feedback, vector quantization, mode selection, linear precoding, matrix interpolation under a unitary constraint. ...
precoder frequency down-sampling and interpolation, to efficiently reconstruct the precoding matrices on all subcarriers based on the feedback of the indexes of the quantized precoders only on a fraction ...
It is inspired from pilot-aided linear MIMO channel estimation for OFDM. ...
doi:10.1109/twc.2007.05334
fatcat:bkd7tk5pzvar7jp7y6x7dsr2b4
A Reconfigurable Method for Time-Correlated MIMO Channels with a Decision Feedback Receiver
2017
Zenodo
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This work considers the combined design of bit loading, precoding and receives filters for a multiple-input-multipleoutput (MIMO) digital communication system. ...
It is well known that, for linear MIMO transceivers, orthogonal transmission (i.e., diagonalization of the channel matrix) is optimal for some criteria such as maximum mutual information. ...
SPACE-TIME CODING TECHNIQUES FOR MIMO-OFDM OFDM is an effective and low-complexity strategy for dealing with frequency-selective channels When the subchannel bandwidth is sufficiently narrow, the frequency ...
doi:10.5281/zenodo.3603753
fatcat:skfp74gscfb3zldngu5m2iltwe
Link Adaptation in Linearly Precoded Closed-Loop MIMO-OFDM Systems with Linear Receivers
2009
2009 IEEE International Conference on Communications
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Upcoming multi antenna systems such as 3GPP-LTE employ code book based multi-mode precoding in order to adapt to a wide range of channel conditions. ...
In this contribution 1 we propose link adaption based on the measure of mutual information between the channel input and the linear detector output and evaluate the behavior of the proposed algorithm in ...
SUMMARY AND CONCLUSIONS In this contribution we proposed a link adaptation strategy for multi-mode precoded MIMO-OFDM systems with linear receivers. ...
doi:10.1109/icc.2009.5199138
dblp:conf/icc/OhlmerF09
fatcat:jt7mbvjxbraclkraycmbjgjeb4
Precoding for Orthogonal Space–Time Block-Coded OFDM Downlink: Mean or Covariance Feedback?
2009
IEEE Transactions on Vehicular Technology
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This paper presents linear and nonlinear precoding design for error-rate improvement in orthogonal space-time block-coded (OSTBC) multiple-input-multiple-output (MIMO) orthogonal frequency-division-multiplexed ...
Index Terms-Correlated antennas, covariance precoding, mean-feedback precoding, multiple-input-multiple-output (MIMO) orthogonal frequency-division-multiplexed (OFDM) downlink, orthogonal space-time block ...
1 OSTBC stands for orthogonal space-time block-coded/coding, depending on the context. ...
doi:10.1109/tvt.2009.2017544
fatcat:nxkdjxhzqjclxlat6tbwded4my
On 3G LTE Terminal Implementation - Standard, Algorithms, Complexities and Challenges
2008
2008 International Wireless Communications and Mobile Computing Conference
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In addition to the computational complexity of even a simple linear equaliser, one of the challenges is an efficient implementation considering necessary flexibility for different MIMO modes, power consumption ...
The air interface of E-UTRAN is based on OFDMA and MIMO in downlink and on SCFDMA in uplink. ...
Parts of this work are carried out within the scope of the EUREKA MEDEA+ project MIMOWA, which is partly funded by the German Federal Ministry of Education and Research. ...
doi:10.1109/iwcmc.2008.168
fatcat:nwry7zbdvndlnkbl3i7rtuzfl4
A Next Generation Wireless Simulator Based on MIMO-OFDM: LTE Case Study
2010
EURASIP Journal on Wireless Communications and Networking
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The design and evaluation of MIMO-OFDM systems require a detailed analysis of a number of functionalities such as MIMO transmission modes, channel estimation, MIMO detection, channel coding, or cross-layer ...
In this paper we present a MIMO-OFDM-based simulator that includes the main physical and link layer functionalities. ...
Acknowledgments This work has been partially supported by the Spanish Government (projects TIC2003-07819 and TEC2007-67289), Junta de Andalucía (Proyecto de Excelencia TIC 03226), and AT4wireless. ...
doi:10.1155/2010/161642
fatcat:cvg475wm4vcp3jaiwxreba7cku
Lattice All-Pass Filter based Precoder Adaptation for MIMO Wireless Channels
[article]
2023
arXiv
pre-print
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2023 pre-print arXiv:2302.11204v1 fatcat:n4mfwdbiivgrvantwueckprzo4
Modern 5G communication systems employ multiple-input multiple-output (MIMO) in conjunction with orthogonal frequency division multiplexing (OFDM) to enhance data rates, particularly for wideband millimetre ...
Since these systems use a large number of subcarriers, feeding back the estimated precoder for even a subset of subcarriers from the receiver to the transmitter is prohibitive. ...
In [4] , a comprehensive survey of linear precoding techniques for massive MIMO systems is covered. ...
arXiv:2302.11204v2
fatcat:a6vokv2t2bc3rib7ooenxz74ae
Frequency-Selective Channel State Feedback in Multiuser MIMO Downlink
2012
IEEE Transactions on Communications
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In this paper we derive a novel method for encoding the MIMO channel state information (CSI) for frequency selective channels and limited feedback. ...
The technique is based on the decomposition of the directional information of a MIMO channel in a two-coordinate system formed by the tangent space of a Grassmann manifold and the tangent space of a unitary ...
in a MIMO-OFDM system. ...
doi:10.1109/tcomm.2012.070912.110184
fatcat:wa24vtfggbhl5eowyrmhpfqbam
An overview of limited feedback in wireless communication systems
2008
IEEE Journal on Selected Areas in Communications
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We review work in systems using various combinations of single antenna, multiple antenna, narrowband, broadband, single-user, and multiuser technology. ...
The transmitter in many systems (such as those using frequency division duplexing) can not leverage techniques such as training to obtain channel state information. ...
ACKNOWLEDGEMENTS The authors would like to thank Nihar Jindal, Kyeongyeon Kim, Marios Kountouris, Vasanthan Raghavan, Shahab Sanayei, and Randa Zakhour for reviewing this document. ...
doi:10.1109/jsac.2008.081002
fatcat:ko5kyqjpsbag5lkril7c75ahly
Exploring the Physical Layer Frontiers of Cellular Uplink - The Vienna LTE-A Simulator
[article]
2015
arXiv
pre-print
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MIMO processing in current wireless communications, as an example, mostly employs codebook based pre-coding to save computational complexity at the transmitters and receivers. ...
Communication systems in practice are subject to many technical/technological constraints and restrictions. ...
While there is no need for interpolation over frequency, the temporal spacing is about twice the spacing of the reference symbols in the downlink. ...
arXiv:1509.02351v1
fatcat:vdtruagg7fd67gz33ajcjrbhre
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