Plurality-count Diversity Combining for Fading M-ary Transmissions PDF Download
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Author: John N. Pierce
Publisher:
ISBN:
Category : Alphabets
Languages : en
Pages : 38
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Book Description
The performance of a plurality-count diversity combiner for fading M-ary transmissions is analyzed, and calculated error probabilities are presented graphically for alphabet sizes of 2, 8, and 32. The performance is shown to be within 3 dB of that of an optimum square-law combiner for moderate alphabet sizes when there is no restriction on the allowable number of diversity branches. It is shown that a worthwhile saving in transmitted power can be effected by using nonbinary alphabets with plurality-count combining for the transmission of binary data. The availability of extra information from the combiner for use with error-correction is discussed.
Author: John N. Pierce
Publisher:
ISBN:
Category : Alphabets
Languages : en
Pages : 38
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Book Description
The performance of a plurality-count diversity combiner for fading M-ary transmissions is analyzed, and calculated error probabilities are presented graphically for alphabet sizes of 2, 8, and 32. The performance is shown to be within 3 dB of that of an optimum square-law combiner for moderate alphabet sizes when there is no restriction on the allowable number of diversity branches. It is shown that a worthwhile saving in transmitted power can be effected by using nonbinary alphabets with plurality-count combining for the transmission of binary data. The availability of extra information from the combiner for use with error-correction is discussed.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 440
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Book Description
Author: Leonard Eyges
Publisher:
ISBN:
Category : Integral equations
Languages : en
Pages : 18
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Book Description
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.
Author: Shepard Anthony Clough
Publisher:
ISBN:
Category : Hanscom AFB (Mass.)
Languages : en
Pages : 90
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Book Description
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.
Author: Sally J. Nauman
Publisher:
ISBN:
Category : Dielectric resonators
Languages : en
Pages : 162
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Book Description
The resonant frequencies for the fundamental modes in circular cylindrical and rectangular parallelopiped high dielectric resonators have been calculated by computer for a range of values of physical dimensions and relative dielectric constant. The frequency range extends from zero to 50,000 Mc/sec, the relative dielectric constant from 50 to 1800, and physical dimensions from zero to 500 mils. Results are presented in tabular and graphical form with frequency plotted versus resonator length for parametric values of relative dielectric constant and cross sectional dimensions. A brief review of earlier work with high dielectric resonators is included. Expressions for the resonant frequency and fundamental mode field configurations are given. (Author).
Author: Robert J. Papa
Publisher:
ISBN:
Category : Electron distribution
Languages : en
Pages : 10
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Book Description
Author: William Swider (Jr.)
Publisher:
ISBN:
Category : Chemical reactions
Languages : en
Pages : 26
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Book Description
Author: E. T. Peters
Publisher:
ISBN:
Category : Boron
Languages : en
Pages : 14
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Book Description
Author: E. Czerlinsky
Publisher:
ISBN:
Category : Anisotropy
Languages : en
Pages : 14
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Book Description
Author: Air Force Cambridge Research Laboratories (U.S.)
Publisher:
ISBN:
Category : Atmosphere, Upper
Languages : en
Pages : 88
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Book Description
The bibliography of AFCRL in-house technical reports lists all reports issued in the existing series. In addition, appendices list reports issued from 1962 to 1964 when series designations were not used, and reports issued in now-defunct series.
