WSEAS Transactions on Signal Processing
Print ISSN: 1790-5052, E-ISSN: 2224-3488
Volume 20, 2024
Exploring Impact of Doppler Effect on
Time-Varying Multipath Wireless Communication Channels via
Model Based Characteristic Analysis
Author:
Abstract: In areas of outdoor wireless communication, the Doppler shift occurs due to the relative motion
between the transmitter and receiver. To apply any baseband channel model for multipath propagation, some
real-world phenomena must be taken into account, such as the Doppler effect, time dispersion, and multipath
scattering. Time dispersion of the radio channel leads to the Intersymbol Interference (ISI) which degrades
communication performance. Scattering at diverse angles gives rise to a range of Doppler frequency shifts
referred to as the Doppler spectrum. The maximum Doppler shift arises whenever the scattering direction is
opposite to the channel trajectory. The Rayleigh or Rician fading distributions of the communication channel
are used to characterize the line-of-sight path (LOS) and non-line-of-sight (NLOS) path radio propagation,
respectively. Multipath fading causes frequency-selectivity and Doppler shifting causes time-selectivity. Two
popular modeling techniques for fading channels are the Filtered White Gaussian Noise and Sum-Of-Sinusoids
schemes. The impact of the Doppler effect on wireless communication channel characteristics will be examined
using the model based performance analysis.
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Keywords: Wireless Communication, Multipath Fading Channel, Doppler Effect, Rayleigh Fading, Filtered
White Gaussian Noise Model, Sum-of-Sinusoids Channel Model
Pages: 145-152
DOI: 10.37394/232014.2024.20.15