Optimum Binary Fsk For Transmitted Reference Systems Over Rayleigh Fading Channels
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Optimum Binary Fsk For Transmitted Reference Systems Over Rayleigh Fading Channels
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Author : Neil J. Bershad
language : en
Publisher:
Release Date : 1965
Optimum Binary Fsk For Transmitted Reference Systems Over Rayleigh Fading Channels written by Neil J. Bershad and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Decision theory categories.
It is well known that in communicating over randomly time-varying channels, a receiver which performs a channel measurement can make a better decision than one that does not. It is shown that a channel-measuring system improves system performance even when the channel characteristics are fixed only during the present message interval. The randomly time-varying channel studied is that of a Rayleigh fading medium with independently fading mark and space channels whose fading is fixed over one baud interval but is independent from baud to baud. The transmission system is a modified frequency shift keying (FSK) system such that during a portion of a baud interval the mark and space frequencies are always transmitted so as to act as reference signals. For the above system, the following characteristics have been established: (a) Optimum receiver configuration, (b) Optimum ratio alpha of information energy to total signal energy as a function of total available signal-to-noise ratio for a single fading channel, (c) Asymptotic optimum alpha for an M-diversity channel, (d) Error probabilities for (b) and asymptotic error probabilities for (c) for alpha opt as a function of total signal-to-noise ratio. The asymptotic results show that by using reference techniques the order of diversity is effectively doubled. (Author).
Optimum Binary Fsk For Transmitted Reference Systems Over Rayleigh Fading Channels
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Author : Neil J. Bershad
language : en
Publisher:
Release Date : 1965
Optimum Binary Fsk For Transmitted Reference Systems Over Rayleigh Fading Channels written by Neil J. Bershad and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Decision theory categories.
It is well known that in communicating over randomly time-varying channels, a receiver which performs a channel measurement can make a better decision than one that does not. It is shown that a channel-measuring system improves system performance even when the channel characteristics are fixed only during the present message interval. The randomly time-varying channel studied is that of a Rayleigh fading medium with independently fading mark and space channels whose fading is fixed over one baud interval but is independent from baud to baud. The transmission system is a modified frequency shift keying (FSK) system such that during a portion of a baud interval the mark and space frequencies are always transmitted so as to act as reference signals. For the above system, the following characteristics have been established: (a) Optimum receiver configuration, (b) Optimum ratio alpha of information energy to total signal energy as a function of total available signal-to-noise ratio for a single fading channel, (c) Asymptotic optimum alpha for an M-diversity channel, (d) Error probabilities for (b) and asymptotic error probabilities for (c) for alpha opt as a function of total signal-to-noise ratio. The asymptotic results show that by using reference techniques the order of diversity is effectively doubled. (Author).
Ozone Absorption In The 9 0 Micron Region
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Author : Shepard Anthony Clough
language : en
Publisher:
Release Date : 1965
Ozone Absorption In The 9 0 Micron Region written by Shepard Anthony Clough and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Hanscom AFB (Mass.) categories.
The absorption of ozone in the 9.0 micron region of the infrared spectrum, due to transitions from the ground state to the v1 and v3 states, has been studied. This report gives the numerical results of an anlysis of the spectrum including transition frequencies and perturbed intensities ordered by quantum number and by frequency. Calculated and observed special contours are included.
An Algorithm For The Deformation Method Of Quadratic Programming
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Author : Roger Even Bove
language : en
Publisher:
Release Date : 1965
An Algorithm For The Deformation Method Of Quadratic Programming written by Roger Even Bove and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Algorithms categories.
The following paper represents work to date on the deformation method for quadratic programming and thus may be regarded as a sequel to Zahl, S. (1964) A Deformation Method for Quadratic Programming, Research Note AFCRL-63-132. It gives an explanation of a modified Iverson programming language and uses this to give a detailed algorithm for the Zahl Deformation Method of Quadratic Programming.
Improved Method For Quantum Mechanical Three Body Problems
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Author : Leonard Eyges
language : en
Publisher:
Release Date : 1965
Improved Method For Quantum Mechanical Three Body Problems written by Leonard Eyges and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Integral equations categories.
The quantum-mechanical ground-state problem for three identical particles bound by attractive inter-particle potentials is discussed. For this problem it has previously been shown that it is advantageous to write the wave function in a special functional form, form which an integral equation which is equivalent to the Schrodinger equation was derived. In this paper a new method for solving this equation is presented. The method involves an expansion of a two-body problem with a potential of the same shape as the inter-particle potential in the three-body problem, but of enhanced strength.
A Discussion Of The Wheeler Feynman Absorber Theory Of Radiation
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Author : Ronald G. Newburgh
language : en
Publisher:
Release Date : 1965
A Discussion Of The Wheeler Feynman Absorber Theory Of Radiation written by Ronald G. Newburgh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Absorption categories.
The Wheeler-Feynman absorber theory of radiation is reviewed. A proof is offered to show that a sum of advanced and retarded effects from the absorber can provide the origin of radiative reaction. This proof is different from and perhaps simpler than that of Wheeler and Feynman. From arguments of momentum and energy conservation the necessity of the absorber for the emission of radiation is demonstrated for three cases. (Author).
Space Electricity
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Author : R. C. Sagalyn
language : en
Publisher:
Release Date : 1965
Space Electricity written by R. C. Sagalyn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Atmosphere, Upper categories.
Hydromagnetic Ionizing Waves
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Author : Allen G. Rubin
language : en
Publisher:
Release Date : 1965
Hydromagnetic Ionizing Waves written by Allen G. Rubin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Electromagnetic waves categories.
A theory of hydromagnetic ionizing waves has been developed which is valid in the region in which gas pressure is negligible, compared with magnetic pressure. The theory takes into account the energy expended in partial ionization of the gas behind the wave. The usual high conductivity boundary condition behind the wave is not employed. The electric field in front of the wave is taken as a parameter. Results of this theory are compared with available experimental measurements, and show good agreement. (Author).
Interaction Between Chlorophyll And Hydroquinone
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Author : Eiji Fujimori
language : en
Publisher:
Release Date : 1965
Interaction Between Chlorophyll And Hydroquinone written by Eiji Fujimori and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Chlorophyll categories.
The Paraboloid Mirror
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Author : Carlyle J. Sletten
language : en
Publisher:
Release Date : 1965
The Paraboloid Mirror written by Carlyle J. Sletten and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1965 with Satellite dish antennas categories.