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Single-carrier space-time block-coded transmissions over frequency-selective fading channels
2003
IEEE Transactions on Information Theory
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We study space-time block coding for single-carrier block transmissions over frequency-selective multipath fading channels. ...
Index Terms-Block transmissions, frequency-selective multipath channels, space-time block coding. ...
Anantharam Swami from ARL for suggesting footnote 2, and anonymous reviewers for their helpful suggestions. ...
doi:10.1109/tit.2002.806158
fatcat:vvqrvacwujajboics3ttjdwdse
Multiplexing
[chapter]
2019
Multiplexing [Working Title]
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A demultiplexer does the reverse operation of multiplexing. It takes digital information from a single line and distributes it to a given number of output lines. ...
A multiplexer is a device that allows digital information from several sources to be routed onto a single line for transmission to a single destination. ...
over a single communication channel by dividing the time frame into equal slots. ...
doi:10.5772/intechopen.85866
fatcat:kll6zjbcg5c6xljk6u3fcskb6i
Analysis of L-Band Digital Aeronautical Communication Systems: L-DACS1 and L-DACS2
2011
2011 Aerospace Conference
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ACKNOWLEDGEMENTS The authors would like to thank Warren Wilson and Tim Brown for useful comments on earlier draft of the paper. ...
In the reverse direction, the first 6.72 ms slot is reserved for two random access opportunities for new aircrafts to join the network. ...
It was designed for 118-137 MHz VHF band using MC-CDMA (multi-carrier code division multiple access) and time division duplexing (TDD). ...
doi:10.1109/aero.2011.5747378
fatcat:zi7aj6ekjbfqzlye45djcfqfk4
Performance Analysis of DVB- T2 using MIMO-OFDM Technique
2013
International Journal of Computer Applications
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To analyze this system, OFDM with Multiple-Input Multiple-Output (MIMO) systems have been used by applying an algorithm called Space-Time Block Code (STBC). ...
Moreover, it leads to significant data rates with improved bit error performance over links having only a single antenna at both the transmitter and receiver. ...
Since two symbols are transmitted in two time slots, the overall transmission rate is 1 symbol per channel use [6] . ...
doi:10.5120/12086-8050
fatcat:6hgbs3fymrfcpgwxamyfwibofe
The WiMAX PHY Layer
[chapter]
2012
Digital Communication
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Space/time encoding for transmit diversity is also implemented in this stage. ...
Block turbo and LDPC coding These are some of the optional channel coding schemes for WiMAX. ...
doi:10.5772/31682
fatcat:vay4fgbxkrepvcgnrxxl5d347m
Space–Time Coded Multi-Transmission Among Distributed Transmitters Without Perfect Synchronization
2004
IEEE Signal Processing Letters
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In this letter a new transmission scheme is proposed which employs distributed space-time block codes to achieve full diversity while tolerating imperfect synchronization. ...
For mobile users without antenna arrays, transmission diversity can be achieved with cooperative space-time encoded transmissions. ...
INTRODUCTION Space-time coding and processing are powerful techniques for transmission diversity, among which space-time block codes (STBC) [1] , [2] are especially promising because of their low computational ...
doi:10.1109/lsp.2004.838213
fatcat:v4l4xgon3rakvgv5wah3cg2xgu
A Cooperative Space-Time Transmission Scheme Based On Symbol Combinations
2014
Zenodo
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This paper proposes a cooperative Alamouti space time transmission scheme with low relay complexity for the cooperative communication systems. ...
In the proposed scheme, the source node combines the data symbols to construct the Alamouti-coded form at the destination node, while the conventional scheme performs the corresponding operations at the ...
The conventional scheme requires time-reversal operation at the relay nodes for the Alamouti coded form. ...
doi:10.5281/zenodo.1337468
fatcat:omvsxiupyff6vfv5jpfh7hjyea
A Cooperative Space-Time Transmission Scheme Based On Symbol Combinations
2014
Zenodo
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This paper proposes a cooperative Alamouti space time transmission scheme with low relay complexity for the cooperative communication systems. ...
In the proposed scheme, the source node combines the data symbols to construct the Alamouti-coded form at the destination node, while the conventional scheme performs the corresponding operations at the ...
The conventional scheme requires time-reversal operation at the relay nodes for the Alamouti coded form. ...
doi:10.5281/zenodo.1096262
fatcat:iwoirslxt5hfdo2nfootmzdbnm
OFDMA WiMAX Physical Layer
[chapter]
2010
WiMAX Networks
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IEEE 802.16 physical (PHY) layer is characterized by Orthogonal Frequency Division Multiplexing (OFDM), Time Division Duplexing, Frequency division Duplexing, Quadrature Amplitude Modulation and Adaptive ...
Slot -Slot is the minimum possible data allocation in the time-frequency domain. It always consists of a single subchannel and two, three or six OFDM symbols depending on the physical mapping. ...
The encoding block size depends on the number of slots allocated and the modulation specified for the current transmission. ...
doi:10.1007/978-90-481-8752-2_2
fatcat:4cgvqpgi2bcbvbygdevtvcbf5u
Implementation of linear detection techniques to overcome channel effects in mimo
2016
International Journal on Cybernetics & Informatics
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In this paper single input single output system (SISO) is compared with multiple input multiple output system (MIMO) in terms of bit error rate performance. ...
Bit error rate performance is also evaluated for MIMO with least squares (LS) and Minimum mean square error (MMSE) linear detection. ...
Space frequency coded alamouti transmission scheme is over different frequency rather than over different time slots as in space time coding, where a symbol goes through four different paths at two different ...
doi:10.5121/ijci.2016.5220
fatcat:hjiayob5nvdrho6pfz2iju3wi4
BER Assessment of FBMC Systems Augmented with Different Space-Time Coding Schemes Over Diverse Channels
2018
International Journal of Engineering & Technology
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Diverse methodologies of encoding schemes like space-time block codes (STBC), orthogonal space-time block codes (OSTBC) &quasi-orthogonal space-time block codes (QOSTBC) are being proposed as alternatives ...
Alamouti and Space-time block codes are widely used in MIMO system because of their ability to achieve full diversity and the different channels are used at the receiver. ...
For instance Alamouti's scheme, Space-time block coding, Omni directional space-time block coding and Quasi space-time block coding. ...
doi:10.14419/ijet.v7i3.8.16844
fatcat:pukwsbs5ofcubimh42blhezsum
Relay ARQ strategies for single carrier MIMO broadband amplify-and-forward cooperative transmission
2010
21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications
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This paper investigates throughput-efficient relay ARQ protocols for single carrier MIMO systems with amplify-and-forward relaying. ...
Compared to the conventional relaying techniques, the proposed mechanisms require only one time slot duration for transmitting the entire data packet at each ARQ round. ...
Relay ARQ with Slots-Mapping Reversal (SMR) Instead of transmitting sub-packet z1 followed by z2 during two consecutive time slots for all ARQ rounds, we propose in this version to reverse the sub-packet ...
doi:10.1109/pimrc.2010.5671613
dblp:conf/pimrc/El-MoutaouakkilAYS10
fatcat:4zh2xczt25dv5mtsodp7x7h3bm
Short Range Gigabit Wireless Communications Systems: Potentials, Challenges and Techniques
2007
2007 IEEE International Conference on Ultra-Wideband
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Figure II shows Despite the large unlicensed bandwidth offered by the 60GHz the general IEEE 802.15.3c user requirement parameters for frequency band, severe technical challenges exist towards making multi-Gbps ...
diagram of the two systems on spatial multiplexing and space time codes is naturally one are quite similar, as shown in Figure 2 . potential candidate. ...
Multiplexing and Channel Access Schemes single carrier syIsteml iS Slightl favorable when the code rate iS-.. .. hinghwhle themulti-carrier system is slightly favorable whentheco Possible techniques for ...
doi:10.1109/icuwb.2007.4380927
fatcat:xbjktqsygbgk7l62zelw4x7xym
Towards Systems Beyond 3G Based on Adaptive OFDMA Transmission
2007
Proceedings of the IEEE
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The presented results indicate that high-performance adaptive OFDM transmission systems are indeed feasible, also for challenging scenarios that involve vehicular velocities, high carrier frequencies, ...
We provide a systematic overview of the design problems, such as the dimensioning of the allocated time-frequency resources, the influence of duplexing schemes, adaptation control issues for downlinks ...
Pfletchinger, CTTC, for many useful comments. The views expressed in this paper do not necessarily represent those of all partner organizations. ...
doi:10.1109/jproc.2007.907119
fatcat:2vkhh2slrvcshptvlant6o76yu
Adaptive link layer strategies for asymmetric high-speed wireless communications
2002
IEEE Transactions on Wireless Communications
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The adaptive FEC algorithm is based on the use of variable-rate trellis coded modulation with fast channel estimation, while the MAC protocol employs a centralized, dynamic slot allocation technique. ...
Both proposals exhibit a high degree of adaptability and flexibility, which allows for increased data throughput while providing a wide range of quality-of-service requirements. ...
Fig. 3 (a) shows the block diagram of the particular set of PTCM codes selected for this application. One single rate-1/2 convolutional code is used for all constellation sizes. ...
doi:10.1109/twc.2002.800541
fatcat:sr6vp3xlcndfbmhlwjq62jkrku
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