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293
Massive MIMO for Crowd Scenarios: A Solution Based on Random Access
"... Abstract—This paper presents a new approach to intra-cell pilot contamination in crowded massive MIMO scenarios. The approach relies on two essential properties of a massive MIMO system, namely near-orthogonality between user channels and near-stability of channel powers. Signal processing technique ..."
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Abstract—This paper presents a new approach to intra-cell pilot contamination in crowded massive MIMO scenarios. The approach relies on two essential properties of a massive MIMO system, namely near-orthogonality between user channels and near-stability of channel powers. Signal processing
Adaptive Pilot Clustering in Heterogeneous Massive MIMO Networks
, 2015
"... We consider the uplink of a cellular massive MIMO network. Acquiring channel state information at the base stations (BSs) requires uplink pilot signaling. Since the number of orthogonal pilot sequences is limited by the channel coherence, pilot reuse across cells is necessary to achieve high spectra ..."
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We consider the uplink of a cellular massive MIMO network. Acquiring channel state information at the base stations (BSs) requires uplink pilot signaling. Since the number of orthogonal pilot sequences is limited by the channel coherence, pilot reuse across cells is necessary to achieve high
Before/After Precoding Massive MIMO Systems for Cloud Radio Access Networks
"... Abstract: In this paper, we investigate two types of in-phase and quadrature-phase (IQ) data transfer methods for cloud multiple-input multiple-output (MIMO) network operation. They are termed “after-precoding ” and “before-precoding”. We formulate a cloud massive MIMO operation problem that aims at ..."
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Cited by 1 (0 self)
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Abstract: In this paper, we investigate two types of in-phase and quadrature-phase (IQ) data transfer methods for cloud multiple-input multiple-output (MIMO) network operation. They are termed “after-precoding ” and “before-precoding”. We formulate a cloud massive MIMO operation problem that aims
permission. Structured Codes in Information Theory: MIMO and Network Applications
"... All rights reserved. ..."
Randomly Spread CDMA: Asymptotics via Statistical Physics
, 2005
"... This paper studies randomly spread code-division multiple access (CDMA) and multiuser detection in the largesystem limit using the replica method developed in statistical physics. Arbitrary input distributions and flat fading are considered. A generic multiuser detector in the form of the posterio ..."
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Cited by 101 (12 self)
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This paper studies randomly spread code-division multiple access (CDMA) and multiuser detection in the largesystem limit using the replica method developed in statistical physics. Arbitrary input distributions and flat fading are considered. A generic multiuser detector in the form
LOW-COMPLEXITY LINEAR PRECODING FOR MULTI-CELL MASSIVE MIMO SYSTEMS
"... Massive MIMO (multiple-input multiple-output) has been recognized as an efficient solution to improve the spectral efficiency of future communication systems. However, in-creasing the number of antennas and users goes hand-in-hand with increasing computational complexity. In particular, the precodin ..."
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be optimized to maximize the weighted max-min fairness. Using simulations, we compare the pro-posed TPE precoding with RZF and show that our scheme can achieve higher throughput using a TPE order of only 3. Index Terms—Massive MIMO, linear precoding, low complexity, multi-cell systems, random matrix theory. 1.
Robust linear receivers for multi-access space-time block coded MIMO systems: A probabilistically constrained approach
- IEEE J. Sel. Areas Commun
, 2006
"... Abstract—Traditional multiuser receiver algorithms developed for multiple-input–multiple-output (MIMO) wireless systems are based on the assumption that the channel state information (CSI) is precisely known at the receiver. However, in practical situations, the exact CSI may be unavailable because ..."
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Cited by 15 (5 self)
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Abstract—Traditional multiuser receiver algorithms developed for multiple-input–multiple-output (MIMO) wireless systems are based on the assumption that the channel state information (CSI) is precisely known at the receiver. However, in practical situations, the exact CSI may be unavailable because
Linear-dispersion Division Multiple-Access for Uplink MIMO systems
"... Abstract: Comprehensive study on Linear-Dispersion Division Multiple-Access (LDDMA) for multi-user uplink MIMO systems was proposed in this work. In this multiplexing scheme, each user’s information symbol was dispersed by a user-specific matrix (USM) both in space and time domain. Then, multi-user ..."
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Abstract: Comprehensive study on Linear-Dispersion Division Multiple-Access (LDDMA) for multi-user uplink MIMO systems was proposed in this work. In this multiplexing scheme, each user’s information symbol was dispersed by a user-specific matrix (USM) both in space and time domain. Then, multi
1Coded Random Access: Applying Codes on Graphs to Design Random Access Protocols
"... The rise of machine-to-machine communications has rekindled the interest in random access protocols as a support for a massive number of uncoordinatedly transmitting devices. The legacy ALOHA approach is developed under a collision model, where slots containing collided packets are considered as was ..."
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random access protocols are described, as well as a case study on how to upgrade a legacy ALOHA system using the ideas of coded random access. I.
TO CODE OR NOT TO CODE
, 2002
"... de nationalité suisse et originaire de Zurich (ZH) et Lucerne (LU) acceptée sur proposition du jury: ..."
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de nationalité suisse et originaire de Zurich (ZH) et Lucerne (LU) acceptée sur proposition du jury:
Results 1 - 10
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