Costas Georghiades | Texas A&M University (original) (raw)

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Research paper thumbnail of THENEAR-FABR PROBLEMl INSPREAD-SPECTRUM ROAD-AUTOMOBILE COMMUNICATIONSt

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Research paper thumbnail of Infrared Road-Automobile Communication

1991 American Control Conference, 1991

We investigate the problem of communication between road-side infrared beacon and moving automobi... more We investigate the problem of communication between road-side infrared beacon and moving automobile. The various noise sources are investigated and a worst-case throughput and error probability are determined.

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Research paper thumbnail of Block-by-Block Channel and Sequence Estimation for ISI/Fading Channels

Information Technology: Transmission, Processing and Storage, 1996

We look at the well studied problems of sequence estimation in unknown or fading channels, and in... more We look at the well studied problems of sequence estimation in unknown or fading channels, and introduce yet another set of algorithms that have reasonable complexity and perform well even in fast changing environments. The algorithms work on a block-by-block basis and utilize periodically, but sparsely inserted known data symbols. In producing their channel estimates, however, the algorithms do make use of the information contained in the received modulated data, thus reducing the rate at which known symbols need to be inserted, and improving performance. Simulation results show good performance for the algorithms.

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Research paper thumbnail of Compression of Binary Sources with Side Information at the Decoder Using LDPC Code

IEEE COMMUNICATIONS LETTERS, 2002

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Research paper thumbnail of Precoder Quantization for MIMO-OFDM Systems over Frequency Selective Channels

2007 16th IST Mobile and Wireless Communications Summit, 2007

Transmit beamforming can improve the performance of multi-input multi-output (MIMO) systems. For ... more Transmit beamforming can improve the performance of multi-input multi-output (MIMO) systems. For FDD systems, the beamforming matrix must be quantized and fed back to the transmitter side. Different compact quantization codebooks have been designed to reduce the overhead of the feedback channel. In this paper, we compare the performance of two different quantization methods for a fixed codebook: vector- wise

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Research paper thumbnail of Communications in Intelligent Vehicle Highway Systems--Part II. Interim Report

This report is a theoretical analysis of several communications techniques that will be useful in... more This report is a theoretical analysis of several communications techniques that will be useful in the full implementation of IVHS technologies. The report is a continuation of the work completed in Part I. It looks at some of the communications problems that have been mentioned as bringing some difficulties to spread spectrum, such as the near-far problem. The report also investigates the simulation protocol that could be used with spread spectrum radio to allow for individualized messages to be sent from traffic management centers to vehicles. The use of infrared as a multi-access communications technique is also investigated. Infrared was chosen since it is the system that is used by Semens in their Lisb and Autoguide systems of vehicle navigation. The third chapter discusses a totally different type of communications. This chapter looks at using radio frequency transponders on vehicles to determine the exact lateral and headway between vehicles. The Path program in California is ...

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Research paper thumbnail of Modulation and coding for high rate optical intersatellite links

15th International Communicatons Satellite Systems Conference and Exhibit, 1994

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Research paper thumbnail of Error performance analysis of space-time codes over Rayleigh fading channels

Journal of Communications and Networks, 2000

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Research paper thumbnail of Upper Bounds on the BER Performance of MTCM-STBC Schemes over Shadowed Rician Fading Channels

Eurasip Journal on Advances in Signal Processing, 2004

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Research paper thumbnail of Modulation and coding for throughput-efficient optical systems

Ieee Transactions on Information Theory, Sep 1, 1994

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Research paper thumbnail of Optimum modulation and frame synchronization for optical communications /

ABSTRACT

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Research paper thumbnail of Noise in Communication Systems

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Research paper thumbnail of Simultaneous slot and symbol synchronization for PPM optical communication

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Research paper thumbnail of Joint synchronization and detection from samples taken through integrate-and-dump

Circuits, Systems and Computers, 1977. Conference Record. 1977 11th Asilomar Conference on

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Research paper thumbnail of Error control coding for satellite and space communications

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Research paper thumbnail of Modulation and coding for throughput-efficient optical free-space links

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Research paper thumbnail of A Position Estimation Algorithm for Vehicle Following

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Research paper thumbnail of ICC'12 CT: IEEE ICC 2012-Communications Theory-Committees and Welcome

Page 1. ICC'12 CT: IEEE ICC 2012 - Communications Theory - Committees and Welcome fu... more Page 1. ICC'12 CT: IEEE ICC 2012 - Communications Theory - Committees and Welcome func_welcome(): message does not exist. Technical Program Committee Raviraj Adve University of Toronto Canada Jeffrey Andrews The University of Texas at Austin USA Amir Banihashemi Carleton University Canada Dror Baron North Carolina State University Israel Gerhard Bauch Universitaet der Bundeswehr Munich Germany Norman Beaulieu University of Alberta Canada Matthieu Bloch Georgia Institute of Technology USA ...

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Research paper thumbnail of Sequence Estimation in Narrowband Interference via the EM Algorithm

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Research paper thumbnail of MULTIUSER DETECTION FOR TURBO-CODED DS/CDMA Approved as to style and content by

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Research paper thumbnail of THENEAR-FABR PROBLEMl INSPREAD-SPECTRUM ROAD-AUTOMOBILE COMMUNICATIONSt

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Research paper thumbnail of Infrared Road-Automobile Communication

1991 American Control Conference, 1991

We investigate the problem of communication between road-side infrared beacon and moving automobi... more We investigate the problem of communication between road-side infrared beacon and moving automobile. The various noise sources are investigated and a worst-case throughput and error probability are determined.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Block-by-Block Channel and Sequence Estimation for ISI/Fading Channels

Information Technology: Transmission, Processing and Storage, 1996

We look at the well studied problems of sequence estimation in unknown or fading channels, and in... more We look at the well studied problems of sequence estimation in unknown or fading channels, and introduce yet another set of algorithms that have reasonable complexity and perform well even in fast changing environments. The algorithms work on a block-by-block basis and utilize periodically, but sparsely inserted known data symbols. In producing their channel estimates, however, the algorithms do make use of the information contained in the received modulated data, thus reducing the rate at which known symbols need to be inserted, and improving performance. Simulation results show good performance for the algorithms.

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Research paper thumbnail of Compression of Binary Sources with Side Information at the Decoder Using LDPC Code

IEEE COMMUNICATIONS LETTERS, 2002

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Research paper thumbnail of Precoder Quantization for MIMO-OFDM Systems over Frequency Selective Channels

2007 16th IST Mobile and Wireless Communications Summit, 2007

Transmit beamforming can improve the performance of multi-input multi-output (MIMO) systems. For ... more Transmit beamforming can improve the performance of multi-input multi-output (MIMO) systems. For FDD systems, the beamforming matrix must be quantized and fed back to the transmitter side. Different compact quantization codebooks have been designed to reduce the overhead of the feedback channel. In this paper, we compare the performance of two different quantization methods for a fixed codebook: vector- wise

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Research paper thumbnail of Communications in Intelligent Vehicle Highway Systems--Part II. Interim Report

This report is a theoretical analysis of several communications techniques that will be useful in... more This report is a theoretical analysis of several communications techniques that will be useful in the full implementation of IVHS technologies. The report is a continuation of the work completed in Part I. It looks at some of the communications problems that have been mentioned as bringing some difficulties to spread spectrum, such as the near-far problem. The report also investigates the simulation protocol that could be used with spread spectrum radio to allow for individualized messages to be sent from traffic management centers to vehicles. The use of infrared as a multi-access communications technique is also investigated. Infrared was chosen since it is the system that is used by Semens in their Lisb and Autoguide systems of vehicle navigation. The third chapter discusses a totally different type of communications. This chapter looks at using radio frequency transponders on vehicles to determine the exact lateral and headway between vehicles. The Path program in California is ...

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Research paper thumbnail of Modulation and coding for high rate optical intersatellite links

15th International Communicatons Satellite Systems Conference and Exhibit, 1994

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Research paper thumbnail of Error performance analysis of space-time codes over Rayleigh fading channels

Journal of Communications and Networks, 2000

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Research paper thumbnail of Upper Bounds on the BER Performance of MTCM-STBC Schemes over Shadowed Rician Fading Channels

Eurasip Journal on Advances in Signal Processing, 2004

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Research paper thumbnail of Modulation and coding for throughput-efficient optical systems

Ieee Transactions on Information Theory, Sep 1, 1994

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Research paper thumbnail of Optimum modulation and frame synchronization for optical communications /

ABSTRACT

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Research paper thumbnail of Noise in Communication Systems

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Research paper thumbnail of Simultaneous slot and symbol synchronization for PPM optical communication

ABSTRACT

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Research paper thumbnail of Joint synchronization and detection from samples taken through integrate-and-dump

Circuits, Systems and Computers, 1977. Conference Record. 1977 11th Asilomar Conference on

ABSTRACT

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Research paper thumbnail of Error control coding for satellite and space communications

ABSTRACT

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Research paper thumbnail of Modulation and coding for throughput-efficient optical free-space links

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Research paper thumbnail of A Position Estimation Algorithm for Vehicle Following

ABSTRACT

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Research paper thumbnail of ICC'12 CT: IEEE ICC 2012-Communications Theory-Committees and Welcome

Page 1. ICC'12 CT: IEEE ICC 2012 - Communications Theory - Committees and Welcome fu... more Page 1. ICC'12 CT: IEEE ICC 2012 - Communications Theory - Committees and Welcome func_welcome(): message does not exist. Technical Program Committee Raviraj Adve University of Toronto Canada Jeffrey Andrews The University of Texas at Austin USA Amir Banihashemi Carleton University Canada Dror Baron North Carolina State University Israel Gerhard Bauch Universitaet der Bundeswehr Munich Germany Norman Beaulieu University of Alberta Canada Matthieu Bloch Georgia Institute of Technology USA ...

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Research paper thumbnail of Sequence Estimation in Narrowband Interference via the EM Algorithm

ABSTRACT

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Research paper thumbnail of MULTIUSER DETECTION FOR TURBO-CODED DS/CDMA Approved as to style and content by

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