Results 251 to 260 of about 60,674 (300)

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 ...
Meixia Tao, Roger S. Cheng
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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
Gian Paolo Mattellini, Kiran Kuchi, Pekka A. Ranta   +2 more
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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.
Jifeng Geng, Urbashi Mitra
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Space-time block codes based on precoding

GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004
We propose a space-time block coding framework based on precoding. The code design is aimed to the tradeoff between rate, diversity and complexity. Specifically, for P transmit antennas, our block codes are based on L distinct precoding matrices, where L/spl les/P.
Zhihong Hong, Akbar M. Sayeed
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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 ...
Fabrizio Pancaldi, Giorgio Matteo Vitetta   +1 more
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Linear toeplitz space time block codes

Proceedings. International Symposium on Information Theory, 2005. ISIT 2005., 2005
In this paper we consider coherent flat fading wireless communication systems with multiple transmitter antennas and single receiver antenna (MISO). We propose a Toeplitz linear space time block code (STBC) that converts an original MISO flat fading channel into a Toeplitz virtual multiple inputs multiple outputs (MIMO) channel.
Jian-Kang Zhang 0002, Jing Liu 0026, Kon Max Wong   +2 more
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Patched Distributed Space-Time Block Codes

2010 IEEE International Conference on Communications, 2010
In this paper, we propose Patched Distributed Space-Time Block Codes (DSTBC) for the Dynamic Decode and Forward (DDF) Relaying protocol, in which the relay transmits combination of information from the first and second phase of the DDF protocol, and the destination makes a linear combination of symbols received in the two phases.
Mélanie Plainchault, Nicolas Gresset, Ghaya Rekaya-Ben Othman   +2 more
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On diagonal algebraic space-time block codes

IEEE Transactions on Communications, 2003
Theoretical and practical aspects of diagonal algebraic space-time block codes over n transmit and m receive antennae are examined. These codes are obtained by sending a rotated version of the information symbols over the principal diagonal of the n /spl times/ n space-time matrix over n transmit antennae and n symbol periods.
Mohamed Oussama Damen, Norman C. Beaulieu   +1 more
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Space-time block codes: a capacity perspective

IEEE Communications Letters, 2000
Space-time block codes are a remarkable modulation scheme discovered recently for the multiple antenna wireless channel. They have an elegant mathematical solution for providing full diversity over the coherent, flat-fading channel. In addition, they require extremely simple encoding and decoding.
Sumeet Sandhu, Arogyaswami Paulraj
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On non-linear space-time block codes

IEEE International Conference on Acoustics Speech and Signal Processing, 2002
A number of space-time block codes have been proposed for the quasi-static, flat-fading channel with coherent receiver. All of these block codes are linear codes, i.e., the encoded codeword is a linear function of the input scalar symbols. Here we propose new non-linear space-time block codes, i.e., the codewords are non-linear functions of the input ...
Sumeet Sandhu, Arogyaswami Paulraj, Krishna Pandit   +2 more
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