Results 241 to 250 of about 18,511,103 (281)
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Closed loop space-time block code
IEEE 54th Vehicular Technology Conference. VTC Fall 2001. Proceedings (Cat. No.01CH37211), 2002In 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 ...
Xiaofeng Tao 0001 +4 more
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Orthogonal Space-Time Block Codes with Feedback
Wireless Personal Communications, 2004In this paper we consider how Orthogonal Space-Time Block Codes (OSTBC) can be used in the presence of feedback from the receiver to the transmitter. First, we survey how some of the feedback techniques for AWGN channels with fading can be applied to OSTBC. Then we consider a simple scheme with diagonal weighting. The optimal diagonal weighting matrix,
Girish Ganesan +2 more
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Patched Distributed Space-Time Block Codes
2010 IEEE International Conference on Communications, 2010In 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 +2 more
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Block Coded Modulation for Space-Time Signaling
2006 IEEE International Symposium on Information Theory, 2006This 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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Linear toeplitz space time block codes
Proceedings. International Symposium on Information Theory, 2005. ISIT 2005., 2005In 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 +2 more
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Space-time block codes based on precoding
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004We 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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Shift-orthogonal space-time block codes
IEEE Transactions on Communications, 2010In this paper, we present a new class of spacetime block code, called shift-orthogonal space-time block codes (SOSTBC), which can maintain orthogonality (hence symbolwise linear decoding) in asynchronous wireless relay networks, under both amplify-and-forward (AF) and decode-and-forward (DF) relaying schemes.
Tian Peng Ren +3 more
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Space-time block codes for noncoherent CPFSK
IEEE Transactions on Wireless Communications, 2010In this paper the problem of space-time block coding for multiple-input multiple-output communication systems employing continuous phase frequency shift keying and one-shot noncoherent detection is investigated. First, the detection problem is analysed in a maximum likelihood perspective; then, design criteria for optimal space-time codes are proposed ...
PANCALDI, Fabrizio +2 more
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Space-Time Block Coding for Wireless Communications
2003Space-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), 2002Transmission 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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