Title :
Angular partitioning to yield equal Doppler contributions
Author :
Norklit, O. ; Vaughan, Rodney G.
Author_Institution :
Ind. Res., Lower Hutt, New Zealand
fDate :
9/1/1999 12:00:00 AM
Abstract :
A beam partitioning is introduced for a mobile surrounded uniformly by dense scatterers. The beams generate signals with equal mean Doppler shift contributions. The equal Doppler contribution of each signal is desirable in antenna combining or diversity systems. Beams that correspond to the partitioning are synthesized using the Fourier method, and a fading rate reduction scheme is described. The fading rate reduction is quantified as an increased correlation distance relative to omnidirectional antennas
Keywords :
Doppler shift; Fourier analysis; diversity reception; electromagnetic wave scattering; land mobile radio; radiowave propagation; Fourier method; angular partitioning; antenna arrays; antenna combining; antenna diversity systems; beam partitioning; beamforming; correlation distance; dense scatterers; equal mean Doppler shift contributions; fading rate reduction; mobile radio; omnidirectional antennas; Digital communication; Diversity reception; Doppler effect; Doppler shift; Fading; Frequency; Mobile antennas; Scattering; Signal generators; Signal synthesis;
Journal_Title :
Vehicular Technology, IEEE Transactions on
