Space time codes
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ICC 2021 - IEEE International Conference on Communications
IEEE ICC is one of the two flagship IEEE conferences in the field of communications; Montreal is to host this conference in 2021. Each annual IEEE ICC conference typically attracts approximately 1,500-2,000 attendees, and will present over 1,000 research works over its duration. As well as being an opportunity to share pioneering research ideas and developments, the conference is also an excellent networking and publicity event, giving the opportunity for businesses and clients to link together, and presenting the scope for companies to publicize themselves and their products among the leaders of communications industries from all over the world.
ECTC is the premier international conference sponsored by the IEEE Components, Packaging and Manufacturing Society. ECTC paper comprise a wide spectrum of topics, including 3D packaging, electronic components, materials, assembly, interconnections, device and system packaging, optoelectronics, reliability, and simulation.
This conference provides an exchange of technical topics in the fields of Solid State Modulators and Switches, Breakdown and Insulation, Compact Pulsed Power Systems, High Voltage Design, High Power Microwaves, Biological Applications, Analytical Methods and Modeling, and Accelerators.
IEEE Global Communications Conference (GLOBECOM) is one of the IEEE Communications Society’s two flagship conferences dedicated to driving innovation in nearly every aspect of communications. Each year, more than 2,900 scientific researchers and their management submit proposals for program sessions to be held at the annual conference. After extensive peer review, the best of the proposals are selected for the conference program, which includes technical papers, tutorials, workshops and industry sessions designed specifically to advance technologies, systems and infrastructure that are continuing to reshape the world and provide all users with access to an unprecedented spectrum of high-speed, seamless and cost-effective global telecommunications services.
The ICASSP meeting is the world's largest and most comprehensive technical conference focused on signal processing and its applications. The conference will feature world-class speakers, tutorials, exhibits, and over 50 lecture and poster sessions.
The IEEE Aerospace and Electronic Systems Magazine publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments.
Speech analysis, synthesis, coding speech recognition, speaker recognition, language modeling, speech production and perception, speech enhancement. In audio, transducers, room acoustics, active sound control, human audition, analysis/synthesis/coding of music, and consumer audio. (8) (IEEE Guide for Authors) The scope for the proposed transactions includes SPEECH PROCESSING - Transmission and storage of Speech signals; speech coding; speech enhancement and noise reduction; ...
The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...
Video A/D and D/A, display technology, image analysis and processing, video signal characterization and representation, video compression techniques and signal processing, multidimensional filters and transforms, analog video signal processing, neural networks for video applications, nonlinear video signal processing, video storage and retrieval, computer vision, packet video, high-speed real-time circuits, VLSI architecture and implementation for video technology, multiprocessor systems--hardware and software-- ...
Covers topics in the scope of IEEE Transactions on Communications but in the form of very brief publication (maximum of 6column lengths, including all diagrams and tables.)
IEEE Transactions on Communications, 2003
Proceedings 2003 IEEE Information Theory Workshop (Cat. No.03EX674), 2003
Maximizing the mutual information of high rate linear matrix modulation schemes for MIMO channels is considered. Linear matrix modulators are described in terms of a space-time basis, which is a three-index object, one index for the symbol, one for time and one for transmit antennas. Corresponding to these, there are three kinds of transformations that leave mutual information invariant; orthogonal ...
IEEE Communications Letters, 2002
We show that when the number of receive antennas is large, the Euclidean distance among codewords dominates the performance of space-frequency codes, the same result as for space-time codes. Therefore, in the presence of a large number of receive antennas, space-frequency codes can be optimized by using the Euclidean-distance criterion valid for additive white Gaussian noise channels. Simulation results show ...
The 5th International Symposium on Wireless Personal Multimedia Communications, 2002
We present a novel space-time spreading scheme for the down-link in a multiuser system. The primary goals of this work are to increase bandwidth efficiency, and to provide joint multiuser detection and space-time decoding, in each mobile station. Each receiver just needs to know its own spreading code and no information about the channel is required in the transmitter. In ...
2009 9th International Symposium on Communications and Information Technology, 2009
In this work, we study the performance of rate-compatible punctured convolutional (RCPC) coded cooperation system. Theoretical bit error probability is deduced over slow Rayleigh fading channel based on the characteristics of RCPC codes and coded cooperation. The coded cooperative system obtains two inherent benefits, such as achieving the spatial diversity offered by the relay channel and also the coding advantages ...
IROS TV 2019-STAR LAB at the University of Surrey Space Technology for Autonomous systems & Robotics
Robotics History: Narratives and Networks Oral Histories:Joel Burdick
8-Element, 1-3GHz Direct Space-to-Information Converter - Matthew Bajor - RFIC Showcase 2018
IEEE Region 5 Presents Stepping Stone Awards on the 50th Anniversary of Apollo 11
Power Electronics for the Space Exploration Hype: APEC 2019
Modulaciones Digitales Avanzadas - Parte 1
2013 IEEE Dennis J. Picard Medal
Fog Computing in Energy and Environment Panel - Fog World Congress 2017
MicroApps: Simulation of Airborne, Space-Borne and Ship-Based Radar Systems with Complex Environment (Agilent EEsof)
John P. Lehoczky, Ragunathan Rajkumar and Lui Sha accept the IEEE Simon Ramo Medal - Honors Ceremony 2016
Volunteers: The IEEE Perpetual Power Source
The Prospects for Scalable Quantum Computing with Superconducting Circuits - Applied Superconductivity Conference 2018
Q&A with Karen Bartleson: IEEE Technology Time Machine Podcast, Episode 3
"IEEE's Role in Developing the National Electrical Code" - IEEE Hampton Roads Section Presentation
IEEE Hampton Roads Presentation "IEEE's Role in Developing the National Electrical Code"
PES-Scholarship Plus: Building the Power Workforce
Active Space-Body Perception and Body Enhancement using Dynamical Neural Systems
Modulaciones Digitales Avanzadas - Parte 2
Maximizing the mutual information of high rate linear matrix modulation schemes for MIMO channels is considered. Linear matrix modulators are described in terms of a space-time basis, which is a three-index object, one index for the symbol, one for time and one for transmit antennas. Corresponding to these, there are three kinds of transformations that leave mutual information invariant; orthogonal symbol rotations, unitary time and unitary antenna rotations. If a group structure is required of the parts of these transformations that embed into the other, the space-time basis is a set of Clebsch-Gordan coefficients realizing the equivalence of representations of this group, and the space-time basis is an extremum of second-order mutual information. Thus, maximal mutual information matrix modulators may be found using the well developed theory of group representations. As an example, symbol rate 1.5 schemes for four transmit antennas, extending over four channel uses, are considered.
We show that when the number of receive antennas is large, the Euclidean distance among codewords dominates the performance of space-frequency codes, the same result as for space-time codes. Therefore, in the presence of a large number of receive antennas, space-frequency codes can be optimized by using the Euclidean-distance criterion valid for additive white Gaussian noise channels. Simulation results show that this conclusion is also valid when the number of antennas is small.
We present a novel space-time spreading scheme for the down-link in a multiuser system. The primary goals of this work are to increase bandwidth efficiency, and to provide joint multiuser detection and space-time decoding, in each mobile station. Each receiver just needs to know its own spreading code and no information about the channel is required in the transmitter. In the proposed architecture, to achieve high bandwidth efficiency, the number of user-channels, is maximized by taking advantage of the large potential capacity of a multiple antenna system.
In this work, we study the performance of rate-compatible punctured convolutional (RCPC) coded cooperation system. Theoretical bit error probability is deduced over slow Rayleigh fading channel based on the characteristics of RCPC codes and coded cooperation. The coded cooperative system obtains two inherent benefits, such as achieving the spatial diversity offered by the relay channel and also the coding advantages provided by the RCPC codes and coded cooperative system. Performance improvement of the coded cooperative system is also provided at last, compared with amplify-and-forward scheme and non-cooperative scheme.
As a joint design of coding, modulation and transmit diversity for flat Rayleigh fading channels, space-time code modulation can obtain both diversity gain and coding gain. This paper describes a new trellis code more fit for DS- SS (direct sequence spread spectra) communication systems, as well as the approach to construct it. We can find the optimal space-time code through systematic code search by computer; also we can construct them with optimal distance convolutional code. The space-time code proposed here can get maximal diversity gain and coding gain in a DS-SS system. The simulation results indicate that it outperforms other known codes in a DS-SS system.
We consider the capacity of multiple-input-multiple-output (MIMO) systems that use OFDM as the modulation format. We point out a basic equivalence between antennas and OFDM-tones. This similarity immediately allows us to essentially reuse all space-time codes designed for flat-fading channels in MIMO-OFDM systems operating in frequency-selective channels. An optimum code would thus code across all antennas and tones (as well as time) simultaneously. Since this can become very complex, we propose a method for grouping antennas and codes in such a way that the inherent diversity is retained, while the complexity is greatly reduced. Capacity computations between the full- complexity and the reduced-complexity systems illustrate this tradeoff.
The determinant and rank criteria used for space-time code design apply at high SNR. Code design metrics developed for low SNR assume a channel autocorrelation matrix with equal eigenvalues, which does not hold in many practical scenarios. This paper shows that a space-time code designed to ensure full diversity at high SNR can suffer significant degradation when implemented at low-to-medium SNR because of the channel autocorrelation profile. We examine the effect of the channel autocorrelation matrix on a space-time code's performance and discuss how knowledge of this matrix can be used for code design, particularly from the aspect of space-time trellis code minimum memory requirements. Our discussion applies to both flat-fading and frequency-selective channels that are treated in a unified manner.
Distributed space-time coding achieves full diversity in wireless relay networks without channel information at the relays. This paper is on the design of specific distributed space-time codes. By Cayley transform, the design of unitary matrices is transformed to that of Hermitian matrices. Gradient-descent method is used in the optimization to find codes that are ¿close¿ to orthogonal designs, which is known to be optimal in both coding gain and diversity. The proposed code design method can be used for networks with any relays and transmission rate. The optimized codes are adaptive to the information symbol constellation. Simulation shows that the designed codes achieve full diversity, and outperform the random code and other existing distributed space-time codes.
In this paper, we study the association of nonorthogonal space-time block coding (NO-STBC) with channel coding and propose an efficient iterative receiver. For two transmit antennas, the use of the Alamouti scheme as STBC is optimal owing to its orthogonality and its unitary rate. For more than two antennas, full rate is maintained by giving up the orthogonality. This nonorthogonality makes the decoding often complex and sub-optimal in terms of exploitation of the diversity. In this paper, we present a low complexity receiver based on iterative process performing jointly space-time decoding and channel decoding. Simulations over uncorrelated Rayleigh flat fading channels show that such a receiver exploits at best the space-time diversity provided by the nonorthogonal STBC and the channel coding.
The project defines a standard for high-speed (>100 Mbps at the physical layer) communication devices via electric power lines, so-called broadband over power line (BPL) devices. This standard uses transmission frequencies below 100 MHz. It is usable by all classes of BPL devices, including BPL devices used for the first-mile/last-mile connection (<1500 m to the premise) to broadband services as ...
This document is part of the POSIX series of standards for applications and user interfaces to open systems. It defines the Ada language bindings as package specifications and accompanying textual descriptions of the applications program interface (API). This standard supports application portability at the source code level through the binding between ISO 8652:1995 (Ada) and ISO/IEC 9945-1:1990 (IEEE Std 1003.1-1990 ...