Results 221 to 230 of about 33,986 (255)

Block Coded Modulation for Space-Time Signaling

2006 IEEE International Symposium on Information Theory, 2006
This paper presents a method for increasing the coding gain of all varieties of space-time block codes (STBC), without using a trellis or introducing dependency between successive transmission blocks, using ideas from Block-Coded Modulation (BCM). For a given STBC, we first increase the constellation size, then prune the codewords of the expanded ...
Mohammad Janani, Aria Nosratinia
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On an Orthogonal Space-Time-Polarization Block Code

Journal of Communications, 2009
Over the past several years, diversity methods such as space, time, and polarization diversity have been successfully implemented in wireless communications systems. Orthogonal space-time block codes efficiently combine space and time diversity, and they have been studied in detail.
Beata J. Wysocki, Tadeusz A. Wysocki, Sarah Spence Adams   +2 more
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Space-Time Block Coding for Wireless Communications

2003
Space-time coding is a technique that promises greatly improved performance in wireless networks by using multiple antennas at the transmitter and receiver. Space-Time Block Coding for Wireless Communications, first published in 2003, is an introduction to the theory of this technology.
Erik G. Larsson, Petre Stoica
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Power adaptation in space-time block code

GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270), 2002
Transmission power adaptations are considered in a space-time block code (STBC) system utilizing feedback channel gain information. We investigate the optimal power adaptation scheme that minimizes the average BER subject a fixed average transmission power constraint.
Myeongsook Seo, Sang Wu Kim
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Differential space-time block-diagonal codes

Science in China Series F: Information Sciences, 2007
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhendong Luo, Yuanan Liu, Jinchun Gao
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Diagonal algebraic space-time block codes

IEEE Transactions on Information Theory, 2002
Summary: We construct a new family of linear space-time (ST) block codes by the combination of rotated constellations and the Hadamard transform, and we prove them to achieve the full transmit diversity over a quasi-static or fast fading channel. The proposed codes transmit at a normalized rate of 1 symbol/\(s\).
Mohamed Oussama Damen, Karim Abed-Meraim, Jean-Claude Belfiore   +2 more
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Noncoherent space-time block coded modulation

2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577), 2004
Unitary space-time modulation is well tailored for flat fading channels where the noncoherent receiver is used. In this paper, we propose a novel scheme of unitary space-time modulation, called noncoherent space-time block coded modulation, by using the set partitioning of signal sets and multilevel coding.
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Performance of space-time block coding and space-time trellis coding for impulse radio

IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2005
Ultra wideband (UWB) systems have attracted a lot of research interest lately, owing to their appealing features in short-range mobile communications. These features include low power peer-to-peer transmissions, multiple access communications, high data rates, and precise positioning capabilities.
Heliot, F, Ghavami, M, Nakhai, M R, Aghvami, A H   +3 more
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Distributed Convolutional-Coded Differential Space-Time Block Coding

2010 IEEE 71st Vehicular Technology Conference, 2010
A low complexity distributed coding scheme is proposed for communications over Rayleigh fading channels. Convolutional Coding (CC) assisted Differential Phase-Shift Keying (DPSK) modulation is employed at the source node for conveying the source signals to two relay nodes as well as to the destination node during the first transmission period ...
Soon Xin Ng, Yang Wang, Lajos Hanzo
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A quasi-orthogonal space-time block code

2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540), 2001
Summary: It has been shown that a complex orthogonal design that provides full diversity and full transmission rate for a space-time block code is not possible for more than two antennas. Previous attempts have been concentrated in generalizing orthogonal designs which provide space-time block codes with full diversity and a high transmission rate.
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