Noise immunity of radio and mobile communications

Abstract

In work results of development of the compact radio transmitter supporting the USB interface for data exchange are presented. The radio transmitter is the duplex device working with is frequency-controlled signals. Correction of transmission errors was carried out by means of application of a Reed-Solomon code. The integrity of the accepted data was controlled by comparison of the resulting sum of the transferred package of data. Results of pilot studies of the maximum steady range of a radio communication at various speeds of data transmission, in the conditions of direct visibility are presented in article. The experiment was made in the mode of continuous monitoring of the accepted data at increase in distance from the transferring radio device. Application of noise immunity coding has been recorded most effectively at a data transfer rate (up to 3 dB). It is proved that increase in range of a radio communication is possible through reduction in the rate of data transmission and it is caused by dependence of sensitivity of the receiver on manipulation speed. Reduction of the sizes of the device through creation of constructive modification is recorded.