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Coherence‐time characterization in a suburban environment
Author(s) -
Ribeiro Antonio Marcelo O.,
Conforti Evandro
Publication year - 2006
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21568
Subject(s) - coherence (philosophical gambling strategy) , coherence time , autocorrelation , microwave , cumulative distribution function , degree of coherence , spectrum analyzer , envelope (radar) , computer science , electronic engineering , physics , optics , statistics , mathematics , telecommunications , engineering , radar , probability density function
An experimental technique for the coherence‐time characterization of a mobile radio envelope employing the autocorrelation coefficient is presented. Field trials at 836 MHz in a suburban area are carried out using a spectrum analyzer as the acquisition apparatus. Autocorrelation coefficients are calculated from the acquired envelopes and the coherence time is calculated for a 0.5 correlation level. Due to the significant variation of the coherence time with the position of the mobile receiver, cumulative distribution functions of the coherence time are calculated in order to interpret the results. The coherence‐time parameter is estimated from these cumulative distribution functions by computing the value above which the coherence time stays for 90% of time. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1137–1141, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21568