Details

Autor(en) / Beteiligte

• Thi, Hoai Linh Nguyen
• Nguyen, Quoc Khuong
• Nguyen, Van Duc

Titel

A Doppler Compensation Method for MIMO-OFDM Systems on Fading Channels

Ist Teil von

• 2023 International Conference on Advanced Technologies for Communications (ATC), 2023, p.117-122

Ort / Verlag

IEEE

Erscheinungsjahr

2023

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE Xplore (IEEE/IET Electronic Library - IEL)

Beschreibungen/Notizen

• The paper proposes a Doppler compensation method for the MIMO-OFDM systems on fading channels. To deploy this method, we first propose a strategy to arrange the pilot symbols in the spatial domain, so that the orthogonality of subcarriers is maintained. Then, we develop a time synchronization method in the time domain, which uses both the correlation and the mean squared error function of the guard interval to improve the time synchronization performance. Finally, a novel Doppler compensation method is implemented in the frequency domain by using a non-uniform fast Fourier transform (FFT) matrix. The numerical simulations show that the proposed architecture provides a significant improvement in terms of system performance compared to the state of the art. At the same level of BER of 10^{-4}, our system mechanism gains SNR of 2 dB in the case of using the FEC coding scheme. Without FEC coding, the gain of the SNR is above 1 dB in the same level of BER mentioned above.