An improved spectral temporal average method for mitigating Doppler effects in V2V communications Online publication date: Fri, 10-Dec-2021
by Wahyu Pamungkas; Jans Hendry; Walid Maulana Hadiansyah
International Journal of Vehicle Information and Communication Systems (IJVICS), Vol. 6, No. 3/4, 2021
Abstract: V2V channel has the main characteristic of high Doppler effect which causes communication channel to change very rapidly. This can be overcome by employing the dynamic equalisation called Spectral Temporal Average (STA) method. The STA uses Least Squares (LS) as channel estimation method which has limitations in the shapes that linear models may assume over long ranges, probably weak extrapolation properties and sensitivity to outliers. To solve this problem, this study proposed the piecewise method for the channel estimation section as part of the STA method. Both methods were tested and compared in low-speed and high-speed scenarios with 100 symbols. The simulation results that piecewise method had an advantage of up to 99.3% compared to the LS method at a speed of 10 m/s and SNR of 17 dB, and 98.5% at speed of 100 m/s and SNR of 20 dB with 100 symbols.
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