Accession Number : ADA260976


Title :   An Introduction to Doppler Effect and Fading in Mobile Communications


Descriptive Note : Master's thesis


Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA


Personal Author(s) : DE Paula, Abdon B


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a260976.pdf


Report Date : Dec 1992


Pagination or Media Count : 98


Abstract : In this research we present an introductory analysis of a complex aspect of mobile communications: Doppler effect is evaluated in both Ricean and Rayleigh channels. A noncoherent 2-FSK scheme is selected to evaluate the behavior of the system under very strong fading channel conditions. The analysis is conducted for the binary case due to the possibility of developing closed form solutions. Therefore, the approach is simplified avoiding long lasting simulations that may obscure the concepts. The probability of bit error for the 2-FSK case can also be used as an initial bound for a M-FSK scheme. Diversity is evaluated as a means of combating fading and Doppler effects. Error correcting codes, in the form of a convolutional codes, are also used and applied to both effects. Mobile communications with Doppler effect, fading channels.


Descriptors :   *COMMUNICATION AND RADIO SYSTEMS , *RADIO LINKS , *DOPPLER EFFECT , SIMULATION , PROBABILITY , THESES , MOBILE , ERRORS , GAIN , SATELLITE COMMUNICATIONS , RADIO SIGNALS , CHANNELS , BESSEL FUNCTIONS


Subject Categories : Radiofrequency Wave Propagation
      Radio Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE