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In this paper novel analytical closed-form expressions for the level crossing rate (LCR) and the average fade duration (AFD) of the double κ-µ random process are presented. Capitalizing on them, second order statistics of multiple input multiple output keyhole fading channels with space-time block coding (STBC) are analyzed. Numerically obtained results are(More)
The technology can in many ways help visually impaired people, but problem of memorizing a large number of phone numbers for most of blind people is still not resolved. The aim of this study was to design, construct and test a device that would serve as a phone book for landline phones. The device is connected between the phone and the phone line and(More)
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