Single-Sideband Techniques in UHF Long-Range Communications

Morrow, W. E.; Mack, C. L.; Nichols, Beverley; Leonhard, Julian

doi:10.1109/jrproc.1956.275087

Cited by 10 publications

(3 citation statements)

References 17 publications

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“…The circumstances initially considered are those often applicable to postdetection combining in an AM system, or a single-sideband system in which provision is made for maintaining coherence of the postdetection signals. [27] These conditions are as follows: assume that simultaneous functions, represent the signals received in different diversity channels as corrupted by noise and fading; each , represents the corrupted signal in the th channel containing the originally transmitted signal . For convenience, suppose that is a steady test tone at a representative midband frequency, or some other steady test signal with a constant local mean square .…”

Section: Basic Assumptions and Other Preliminariesmentioning

confidence: 99%

“…The first point to be noticed is that implies (27) without regard to the distribution of the or the possible dependence of these variables. If, in particular, , , then (28) This behavior is in marked contrast to the corresponding relationship (18) for selection diversity, which increases much less rapidly with than (28) does.…”

Section: Maximal-ratio Diversitymentioning

confidence: 99%

“…Instrumentation for postdetection maximal-ratio combining has been discussed by Kahn [6] and by Morrow, et al [27] for what amount to AM systems, and by Mack [45] for FM systems. An ingenious predetection maximal-ratio combiner has been devised by Granlund.…”

Section: Predetection Vs Postdetection Combiningmentioning

confidence: 99%

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Linear diversity combining techniques

2003

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This paper provides analyses of three types of diversity combining systems in practical use. These are: selection diversity, maximal-ratio diversity, and equal-gain diversity systems. Quantitative measures of the relative performance (under realistic conditions) of the three systems are provided. The effects of various departures from ideal conditions, such as non-Rayleigh fading and partially coherent signal or noise voltages, are considered. Some discussion is also included of the relative merits of predetection and postdetection combining and of the problems in determining and using long-term distributions. The principal results are given in graphs and tables, useful in system design. It is seen that the simplest possible combiner, the equal-gain system, will generally yield performance essentially equivalent to the maximum obtainable from any quasilinear system. The principal application of the results is to diversity communication systems and the discussion is set in that context, but many of the results are also applicable to certain radar and navigation systems.

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Section: Basic Assumptions and Other Preliminariesmentioning

confidence: 99%

Section: Maximal-ratio Diversitymentioning

confidence: 99%