Results 211 to 220 of about 33,097 (233)
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Precoded visible light communications
2013 9th International Conference on Information, Communications & Signal Processing, 2013Multiple input multiple output (MIMO) technology appears attractive for indoor visible light communication (VLC) systems as multiple light-emitting diodes (LED) sources are typically deployed for indoor environment. Most of current indoor MIMO VLC systems utilize single user terminal scenario to investigate the performance of the system.
null Jian Chen +3 more
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Precoded opportunistic multiuser detection
2012 IEEE International Conference on Communication Systems (ICCS), 2012In this paper, we study multi-user multi-input-multi-output (MU-MIMO) wireless system for spectrum sharing over a limited bandwidth, in which transmit covariance matrices of the coexisting users independently updated in an iterative manner for individual rate maximization.
Nirul Kumar, Aditya Trivedi
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An Iterative Precoder Design for Successive Zero-Forcing Precoded Systems
IEEE Communications Letters, 2012Successive zero-forcing (SZF) is a precoding technique for broadcast channels that partially precancels the multiuser interference. Due to the residual interference, the optimal precoder design for SZF is difficult to find, and currently unknown. This letter proposes a suboptimal iterative precoder design for the sum rate maximization problem for SZF ...
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Covariance-based linear precoding
IEEE Journal on Selected Areas in Communications, 2006This paper extends the self-contained theory of linear precoding to the field of covariance based spatio-temporal downlink processing for direct-sequence code-division multiple-access (CDMA) systems and shows the applicability to the release 6 of high-speed downlink packet access (HSDPA).
B. Zerlin +3 more
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Robust Tomlinson-Harashima Precoding
2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, 2006Tomlinson-Harashima precoding (THP) for a wireless system with multiple cooperative transmitters and non-cooperative receivers is considered (downlink channel). In the literature THP has been optimized for this channel assuming complete channel state information (CSI).
F.A. Dietrich, W. Utschick
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MIMO Wireless Linear Precoding
IEEE Signal Processing Magazine, 2007This article provides a tutorial of linear precoding for a frequency- flat, single-user MIMO wireless system, examining both theoretical foundations and practical issues. The article first discusses principles for CSIT (channel-side information at the transmitter) acquisition and develops a dynamic CSIT model, which spans perfectly to statistical CSIT,
Mai Vu, Arogyaswami Paulraj
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On Equivalence of GSVD-SLNR Precoding and JD-SLNR Precoding
2019GSVD-SLNR precoding and JD-SLNR precoding are two remarkable linear precoding schemes in downlink MU-MIMO systems. Both of them outperform the original SLNR precoding with considerable gains in terms of bit error rate. However, the relationship of such two schemes has not been investigated yet.
Zuoliang Yin, Zhian Deng
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2010
In practical communication systems, the transmitter usually sends out training symbols to the receiver, based on which the channel can be estimated at the receiver. It is therefore reasonable to assume that the channel is known to the receiver. When the channel state information is also known to the transmitter, we can optimize the transmitter to ...
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In practical communication systems, the transmitter usually sends out training symbols to the receiver, based on which the channel can be estimated at the receiver. It is therefore reasonable to assume that the channel is known to the receiver. When the channel state information is also known to the transmitter, we can optimize the transmitter to ...
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Precoding for convolutional codes
Proceedings of ICC/SUPERCOMM '96 - International Conference on Communications, 2002The study the distance relations between the input sequences and the code sequences in convolutional codes. Namely, starting from some encoder realization of a code, we investigate the effect of inserting a precoder before the encoder. The precoder is a one-to-one operation on input sequences, and it may have memory.
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