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Low data rate ground wave communications over land
C. M. Crain
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Abstract
This report indicates the potential of ground wave communications under the assumed condition of no ionospheric transmission of either wanted signal or unwanted noise, a condition for which practical experience is generally lacking. It is shown that a system which can give reliable very low data rate transmission to distances of the order of 1000 miles during conditions of negligible ionospheric transmissions also is capable of providing reliable voice communications during normal conditions. (Author)