Results 151 to 160 of about 508,076 (233)

Semiorthogonal Space–Time Block Codes

IEEE Transactions on Information Theory, 2010
In this paper, a new class of full-diversity, rate-one space-time block codes (STBCs) called semiorthogonal algebraic space-time block codes (SAST codes) is proposed. SAST codes are delay optimal when the number of transmit antennas is even. The SAST codeword matrix has a generalized Alamouti structure where the transmitted symbols are replaced by ...
null Ngoc-Dung Dao, C. Tellambura
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Distributed space-time block coding

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005
In this paper, a new class of distributed space-time block codes (DSTBCs) is introduced. These DSTBCs are designed for wireless networks which have a large set of single-antenna relay nodes Nscr, but at any given time only a small, a priori unknown subset of nodes SsubeNscr can be active.
S. Yiu, R. Schober, L. Lampe
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Differential space-time block codes

GLOBECOM'01. IEEE Global Telecommunications Conference (Cat. No.01CH37270), 2002
We propose a new differential modulation scheme for multiple-antenna systems based on square space-time block codes (STBC) when neither the transmitter nor the receiver knows channel state information. Compared with the known differential unitary space-time modulation (DUSTM), the proposed constellations generally have multiple amplitudes and do not ...
null Meixia Tao, R.S. Cheng
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Space-time block codes for noncoherent CPFSK

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005
In this paper the problem of unitary rate space-time block coding for multiple-input multiple-output communication systems employing continuous phase frequency shift keying is investigated. First, one-shot noncoherent detection is analysed in a maximum likelihood perspective; then, design criteria for optimal space-time codes are proposed and some ...
PANCALDI, Fabrizio, VITETTA, Giorgio Matteo   +1 more
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High-Rate Space-Time Block Coding Schemes

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2008
A rate-6/4 full-diversity orthogonal space-time block code (STBC) is constructed for QPSK and 2 transmit antennas by applying constellation scaling and rotation to the set of quaternions used in Alamouti code. Also given is a rate-9/8 full-diversity quasi-orthogonal space-time block code (QOSTBC) for 4 transmit antennas.
Duy H. N. Nguyen, Ha H. Nguyen, Hoang D. Tuan   +2 more
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Full Diversity Blind Space-Time Block Codes

IEEE Transactions on Information Theory, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhang, Jian-Kang, Huang, Fei, Ma, Shuang
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Closed loop space-time block code

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211), 2002
In 3GPP FDD specifications, space time transmit diversity (STTD) employs space-time block code (STBC) to maintain orthogonality between the two antennas in order to avoid self-interference in fading channels. However, the STTD technique is just open loop transmit diversity, and we investigate whether we can obtain further gain if closed loop STBC is ...
null Tao Xiaofeng, H. Harald, null Yu Zhuizhuan, null Qin Haiyan, null Zhang Ping   +4 more
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Space time block code for EDGE

IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211), 2002
Transmit diversity techniques have emerged as a very powerful tool to mitigate the adverse effect of fading in mobile radio communications. In transmission systems with weak channel coding or slow moving mobiles transmit diversity techniques that can improve uncoded transmission are of particular interest. In this paper we apply a space-time block code
G.P. Mattellini, K. Kuchi, P.A. Ranta
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Universal rotated space time block codes

2005 IEEE International Conference on Personal Wireless Communications, 2005. ICPWC 2005., 2005
In this paper, we give a family of orthogonal space time block codes (STBC), which is so called universal rotated STBC. The constructed codes include all existing STBC cases, and give several extended results suitable for different modulations, such as MPSK or M-QAM.
null Jia Hou, null Moon Ho Lee
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Nonlinear hierarchical space-time block codes

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004
Recent designs for space-time block codes (STBCs) have exploited the structure of the codes (unitary, orthogonal) to enable systematic construction. Code sets found by an exhaustive search to optimize cost functions can often achieve performance gains of several dB; however, such searches are not feasible for large block or constellation sizes.
null Jifeng Geng, U. Mitra
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