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The second most important source of indoor radon, after soil beneath dwelling, is building material. With the increase in environmental awareness and new energy-saving policies, residents tend to replace the existing windows with tighter windows, which leads to a decrease in air exchange rate and consequently an increase in indoor radon concentration. In case of low exchange rates, dose caused by...
This paper describes realization of the remote monitoring for the microwave repeater systems with solar and wind power supply using GPRS technology. The microwave repeater systems are used instead of the passive plane repeaters. The microwave repeater systems have smaller dimensions, lower cost, easier installations and better performance then the passive plane repeaters.
In this paper we describe realization of low cost 2 Mbit/s digital simplex link at 23 GHz for Digital Audio Modulation Transmission in urban areas. Usage of jitter attenuator after demodulation and extremely low residual BER of 1E-10 gives excellent audio performances. The main requirement was low cost which is achieved by usage of direct modulation and avoiding costly digital signal processing wherever...
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