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Results 1 - 10
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8,148
Evaluations of Elliptical Modulation Scheme
"... Abstract—This paper aimed to evaluate some modulation methods, which have been defined based on Elliptical Modulation Scheme, namely are Eccentricity Shift Keying (ESK), Inclination Angle Shift Keying (IASK) and Elliptical Phase Shift Keying (EPSK). In this paper, signal characteristics of these thr ..."
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Cited by 1 (1 self)
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Abstract—This paper aimed to evaluate some modulation methods, which have been defined based on Elliptical Modulation Scheme, namely are Eccentricity Shift Keying (ESK), Inclination Angle Shift Keying (IASK) and Elliptical Phase Shift Keying (EPSK). In this paper, signal characteristics
Design of Coded Modulation Schemes for
- in IEEE transaction on Communications
, 2001
"... In this paper, we propose a technique to decouple the problems of spatial and temporal diversity gain maximization involved in the design of space-time codes in fast Rayleigh fading channels by using orthogonal transmit diversity systems. We will also introduce the idea of constellation expansion (i ..."
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(in dimension or size) to design coded modulation schemes with maximum temporal diversity gain for orthogonal transmit systems. The Chernoff upper bound for the error probability is used to show that the code design criterion reduces to the maximization of Hamming and product distances in the expanded
Modulation Scheme Performance
"... I am deeply grateful to my thesis advisor Dr. Edit K. Bourgeois for steadily helping, guiding and assisting me all these months. She has undoubtedly been a crucial architect in the development of this research. I thank all my professors, classmates, and friends for their immense contribution to my e ..."
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and remain my source of inspiration. Chirp-Slope Keying (CSK) is a new and innovative digital modulation scheme for underwater data transmission. The underwater environment brings up several challenges to the manufacturing and operation of communication systems. This thesis shows through analysis
A Rate-Adaptive MAC Protocol for Multi-Hop Wireless Networks
, 2001
"... Wireless local area networks (W-LANs) have become increasingly popular due to the recent availability of affordable devices that are capable of communicating at high data rates. These high rates are possible, in part, through new modulation schemes that are optimized for the channel conditions bring ..."
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Cited by 484 (5 self)
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Wireless local area networks (W-LANs) have become increasingly popular due to the recent availability of affordable devices that are capable of communicating at high data rates. These high rates are possible, in part, through new modulation schemes that are optimized for the channel conditions
An Efficient Modulation Scheme for Dual Beam
, 2008
"... Abstract. An eight stage balanced modulation scheme for dual beam polarimetry is presented in this paper. The four Stokes parameters are weighted equally in all the eight stages of modulation resulting in total polarimetric efficiency of unity. The gain table error inherent in dual beam system is re ..."
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Abstract. An eight stage balanced modulation scheme for dual beam polarimetry is presented in this paper. The four Stokes parameters are weighted equally in all the eight stages of modulation resulting in total polarimetric efficiency of unity. The gain table error inherent in dual beam system
Differential Space-Time Modulation Schemes
, 2001
"... Differential space-time modulation (DSTM) schemes were recently proposed to fully exploit the receive and transmit antenna diversities without the need for channel state information. DSTM is attractive in fast flat fading channels since accurate channel estimation is difficult to achieve. In this pa ..."
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Differential space-time modulation (DSTM) schemes were recently proposed to fully exploit the receive and transmit antenna diversities without the need for channel state information. DSTM is attractive in fast flat fading channels since accurate channel estimation is difficult to achieve
Least squares quantization in pcm.
- Bell Telephone Laboratories Paper
, 1982
"... Abstract-It has long been realized that in pulse-code modulation (PCM), with a given ensemble of signals to handle, the quantum values should be spaced more closely in the voltage regions where the signal amplitude is more likely to fall. It has been shown by Panter and Dite that, in the limit as t ..."
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Cited by 1362 (0 self)
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Abstract-It has long been realized that in pulse-code modulation (PCM), with a given ensemble of signals to handle, the quantum values should be spaced more closely in the voltage regions where the signal amplitude is more likely to fall. It has been shown by Panter and Dite that, in the limit
Correcting Charge-Constrained Errors in the Rank-Modulation Scheme
"... We investigate error-correcting codes for a novel storage technology for flash memories, the rank-modulation scheme. In this scheme, a set of n cells stores information in the permutation induced by the different charge levels of the individual cells. The resulting scheme eliminates the need for dis ..."
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Cited by 37 (22 self)
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We investigate error-correcting codes for a novel storage technology for flash memories, the rank-modulation scheme. In this scheme, a set of n cells stores information in the permutation induced by the different charge levels of the individual cells. The resulting scheme eliminates the need
ANALYSING THE BER OF VARIOUS MODULATION SCHEMES
"... An interesting approach for implementing diversity is space–time trellis coding, where symbols are encoded according to the antennas through which they are simultaneously transmitted and are decoded using a maximum likelihood decoder. This scheme is very effective, as it combines the benefits of for ..."
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An interesting approach for implementing diversity is space–time trellis coding, where symbols are encoded according to the antennas through which they are simultaneously transmitted and are decoded using a maximum likelihood decoder. This scheme is very effective, as it combines the benefits
CONFIGURATIONS AND MODULATION SCHEMES TRADE-OFF
"... During the preliminary phase A of the Ground-based European Nulling Interferometer Experiment (GENIE), a number of interferometric configurations have been studied, in the cases of exozodiacal cloud and hot Jupiter detection. Their expected performances have been computed in light of the measured or ..."
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matching will be critical issues for this configuration. In the case of hot Jupiter detection, a double Bracewell with internal modulation in the L ’ band seems well appropriate, and should allow to carry out low resolution spectroscopy on a few bright exoplanets. The basic assumptions and computations
Results 1 - 10
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8,148
