Results 221 to 230 of about 34,907 (243)

Differential Distributed Space-Time Coding

2013
This chapter is on the differential use of distributed space-time coding (DSTC). First, the transmission protocol and decoding of differential DSTC are explained in Sect. 4.1. Then several code designs are introduced in Sect. 4.2. Finally, simulated error probability of differential DSTC is shown in Sect. 4.3.
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Differential space-time codes with four transmit antennas

1st International Symposium onWireless Communication Systems, 2004., 2005
We give near optimal differential unitary space-time codes using Bruhat decomposition and Weyl group for four transmit antennas. In case of two transmit antennas, it has been assumed that the two channels are uncorrelated. However, for four transmit antennas, the assumption is no longer justified. Therefore the new codes are found by examination of the
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Improved codes for differential space-time-frequency coded OFDM

Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004., 2005
With no channel state information (CSI) at the receiver, the highest possible diversity order for multiantenna transmissions over frequency selective channels, is given by the product of the number of transmit and receive antennas and the multipath channel length, the same as the case with perfect CSI at the receiver.
null Qian Ma, C. Tepedelenlioglu
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Coded differential space-time modulation for flat fading channels

IEEE Transactions on Wireless Communications, 2003
In this paper, powerful coding techniques for differential space-time modulation (DSTM) over Rayleigh flat fading channels and noncoherent detection without channel state information at the receiver are investigated. In particular, multilevel coding, bit-interleaved coded modulation, and so-called hybrid coded modulation (HCM) are devised and compared.
Lutz H.-J. Lampe, Robert Schober, Robert F. H. Fischer   +2 more
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Algebraic designs for coherent and differentially coherent space-time codes

2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540), 2002
The authors previously presented a new space-time architecture combining generalized layered transmission, advanced iterative multi-user detection techniques, and space-time code design that provides superior performance compared to the layered architectures proposed by Foschini (1996) and Tarokh et al. (see IEEE Trans. on Information Theory, vol.IT-44,
Hesham El Gamal, A. Roger Hammons Jr.
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Distributed differential space-time codes based on Weyl's reciprocity

2009 IEEE International Symposium on Information Theory, 2009
In this paper, design of a distributed differential space time code is considered. To satisfy the commuting property required in the design, Weyl reciprocity is hired. Introducing methods and illustrating examples show that the proposed methods have more flexible, and more easy to get codes than existing methods, especially in a case with high ...
Haiquan Wang, Zhijin Zhao
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Differential Space-Time Line Codes

2023
Jingon Joung, Koichi Adachi
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Design of Differential Space-Time Codes Using Group Theory

2001
It is well-known that multiple transmit and receiving antennas can significantly improve the performance of wireless networks. The design of good modulation schemes for the model of multiple antenna wireless transmission in a fast fading environment (e.g., mobile communication) leads to an interesting packing problem for unitary matrices. Surprisingly,
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Comparison of coherent and differential space-time block codes over spatially correlated channels

IEEE Transactions on Consumer Electronics, 2004
F Said
exaly  

New group product differential unitary space-time codes with simplified design and detection

IEEE Transactions on Wireless Communications, 2008
David Smith, Leif Hanlen
exaly