Results 221 to 230 of about 17,613 (262)

Diversity and Multiplexing Tradeoff of Spatial Multiplexing MIMO Systems With CSI

IEEE Transactions on Information Theory, 2008
Following the seminal work of Zheng and Tse, this paper investigates the fundamental diversity and multiplexing tradeoff of multiple-input-multiple-output (MIMO) systems in which knowledge of the channel state at both sides of the link is employed to transmit independent data streams through the channel eigenmodes.
Luis Garcia Ordóñez, Alba Pagès-Zamora, Javier Rodríguez Fonollosa   +2 more
openaire   +1 more source

Spatial-Multiplexed Soft Handoff

2007 IEEE Wireless Communications and Networking Conference, 2007
We present a new soft handoff scheme in forward link code division multiple access cellular systems, wherein each base station participating in soft handoff sends only a subset of the main data stream (called sub-stream) and the mobile receiver reassembles the sub-streams and restores the main data stream. This approach can reduce the data transmission
openaire   +1 more source

Spatial multiplexing via antenna switching

IEEE Communications Letters, 2009
Udgivelsesdato ...
Osama N. Alrabadi, Constantinos B. Papadias, Antonis Kalis, Nicola Marchetti, Ramjee Prasad   +4 more
openaire   +1 more source

Transmit selection in spatial multiplexing systems

IEEE Communications Letters, 2002
In this letter we solve the transmit antenna selection problem for a zero forcing spatial multiplexing system with knowledge of the channel statistics at the transmitter. We show through Wishart matrix analysis that the signal-to-noise ratio on the kth stream is a weighted Chi-squared variable with the weight equal to-the kth diagonal entry of the ...
Dhananjay Gore, Robert W. Heath Jr., Arogyaswami Paulraj   +2 more
openaire   +1 more source

Confidential Spatial Multiplexing in the Presence of Eavesdropper

MILCOM 2013 - 2013 IEEE Military Communications Conference, 2013
In this paper, we present a confidential spatial multiplexing scheme in the presence of an eavesdropper, when the number of antennas at the source is less than that at the intended destination. To degrade the eavesdropper's channel, a pre-coded interference is added to the message at the source.
Taha A. Khalaf, Sang Wu Kim
openaire   +1 more source

State-based Spatial Multiplexing (SBSM)

2006 40th Annual Conference on Information Sciences and Systems, 2006
State-based spatial multiplexing (SBSM) is a novel multiple input multiple output (MIMO) technology that enables MIMO operations between simple COTS radios. The SBSM technique works at the medium access control (MAC) layer; therefore, the radio only needs to be synchronized at the symbol level instead of the carrier.
Marc P. Olivieri, Jon Russo, Alex Lackpour   +2 more
openaire   +1 more source

Quantized Feedback for Spatial Multiplexing System

2008 IEEE Wireless Communications and Networking Conference, 2008
In this paper we present a quantized preceding scheme for the spatial multiplexing system equipped with MMSE-SIC receiver. The preceding matrix, consisting of a beamforming matrix and a power allocation matrix, is selected to maximize the minimum post-detection SINR of the MMSE-SIC receiver.
Qiubin Gao, Xian-Da Zhang, Jian Li 0053
openaire   +1 more source

Superresolved spatially multiplexed interferometric microscopy

Optics Letters, 2017
Superresolution capability by angular and time multiplexing is implemented onto a regular microscope. The technique, named superresolved spatially multiplexed interferometric microscopy (S2MIM), follows our previously reported SMIM technique [Opt. Express22, 14929 (2014)OPEXFF1094-408710.1364/OE.22.014929, J. Biomed.
José Ángel, Picazo-Bueno, Zeev, Zalevsky, Javier, García, Vicente, Micó   +3 more
openaire   +2 more sources

Orthogonalized Spatial Multiplexing for MIMO Systems

IEEE Vehicular Technology Conference, 2006
In this paper, we propose a new spatial multiplexing scheme for transmission over flat-fading multiple-input multiple-output (MIMO) channels, which allows a simple maximum-likelihood decoding at the receiver with small feedback information. We begin with a real-valued representation of the complex-valued system model and show that we can achieve ...
Heunchul Lee, Seokhwan Park, Inkyu Lee
openaire   +1 more source

Modal Dynamics in Spatially Multiplexed Links

Optical Fiber Communication Conference (OFC) 2019, 2019
We investigate the vibration sensitivity of spatially multiplexed links by measuring the mode-coupling dynamics of a four-core coupled-core fiber and a reference single-mode fiber. We show that the speed of dynamics increases with mode count.
Karthik Choutagunta, Roland Ryf, Nicolas K. Fontaine, Steffen Wittek, Juan Carlos Alvarado-Zacarias, Mikael Mazur, Haoshuo Chen, René-Jean Essiambre, Rodrigo Amezcua Correa, Tetsuya Hayashi, Yoshiaki Tamura, Takemi Hasegawa, Toshiki Taru, Joseph M. Kahn   +13 more
openaire   +2 more sources