Title :
Envelope correlation of wide-band signals in Rayleigh fading and its implications for frequency diversity
Author :
Fekri, F. ; Krzymien, W.A. ; Sesay, A.
Author_Institution :
Telecommun. Res. Labs., Alberta Univ., Edmonton, Alta., Canada
Abstract :
We analyze the envelope correlation of two resolvable paths belonging to replicas of a wide-band signal modulated on two subcarriers in a Rayleigh fading channel. The results indicate that the frequency correlation of resolvable paths not only depends on the RMS delay spread but also on the signal bandwidth. The results can be used in appropriately choosing the subcarriers of direct sequence spread spectrum (DS-SS) communication systems employing frequency diversity for wide-band signals. For this analysis the authors assume a wide-sense stationary uncorrelated scattering (WSSUS) mobile radio channel in which the propagation takes place by single scattering
Keywords :
Rayleigh channels; correlation methods; delays; diversity reception; electromagnetic wave scattering; fading; land mobile radio; pseudonoise codes; radiowave propagation; spread spectrum communication; DS-SS communication systems; RMS delay spread; Rayleigh fading; direct sequence spread spectrum; envelope correlation; frequency correlation; frequency diversity; mobile radio channel; modulation; propagation; resolvable paths; signal bandwidth; single scattering; subcarriers; wide-sense stationary uncorrelated scattering; wideband signals; Bandwidth; Delay; Fading; Frequency; Rayleigh channels; Rayleigh scattering; Signal analysis; Signal resolution; Spread spectrum communication; Wideband;
Conference_Titel :
Vehicular Technology Conference, 1997, IEEE 47th
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-3659-3
DOI :
10.1109/VETEC.1997.596321
