Abstract—This research addresses the issue of inter-carrier interference (ICI) in Orthogonal Frequency Division Multiplexing (OFDM) in Terrestrial Digital Video Broadcasting (DVB-T) systems. However, the sensitivity of OFDM systems to frequency offset leads to ICI, which manifests as Additive White Gaussian Noise (AWGN) and time-varying phase rotation during mobility scenarios. In this research a window known as Convolved Triangle ('CTW') that exhibits a narrow main loop in the frequency domain and low side loop power is introduced as a function of time. This results in reduced ICI and improved Bit Error Rate (BER) performance. To evaluate the BER performance of the proposed window the CODIT channel model (realistic channel conditions) that accounts for Doppler spread and frequency offset, which significantly contribute to ICI in mobile environments, is employed in addition to employing various windows and modulation schemes. BER performance results for fixed communication scenarios using different modulation schemes, including QPSK and 16QAM are presented. Results demonstrate that the CTW window improves the BER by 4 dB in QPSK and 12 dB in 16QAM compared to traditional OFDM. Furthermore, the impact of mobility by incorporating a maximum Doppler shift of 80 Hz, corresponding to a speed of 30 m/s is considered. ICI begins to affect the OFDM signal at a Signal-to-Interference Ratio (SIR) of approximately 29 dB in urban channels; the CTW window enhances the BER from 10^-3 to 10^-7.