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BELL SYSTEM TECHNICAL JOURNAL 



Fig. 2 — View of musa receivers. 



General 



When waves arriving over several paths from the same transmitter 

 are demodulated in a simple receiver the severity of the resultant 

 selective fading is dependent upon the relative amplitudes at the 

 demodulator of the several path contributions, the differences in the 

 times of transmission over the several paths, and the rates at which 

 tlie path lengths are varying.^ When the difference in the time of 



^ R. K. Potter, "Transmission Characteristics of a Short -Wave Telephone Cir- 

 cuit," Proc. I.R.E., Vol. 18, No. 4, pp. 581-648, April 1930. 



