TY - GEN
T1 - Doppler Spread Analysis for Reducing High-Mobility Massive MIMO V2V Channel Time-Variation
AU - Yan, Zeyu
AU - Zhang, Weile
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - In this paper, we consider fast time-varying channels of high-mobility vehicle-to-vehicle (V2V) communications for massive multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. Large-scale uniform linear arrays (ULA) are configured at the transmitter and receiver to separate multiple angle domain Doppler frequency offsets (DFOs) based on transmit and receive beamforming with high spatial resolution. Then each beamforming branch comprises only one dominant DFO. Next, we perform the conventional channel estimation method for each beamforming branch, and carry out maximum-ratio-combining (MRC) for data detection. Power spectrum density (PSD) and Doppler spread of the equivalent link between the transmitter and receiver are derived and regarded as the criterion for assessing the residual channel time-variation caused by limited antennas in practice. Interestingly, the asymptotic scaling law between Doppler spread and the number of transceiver antennas shows that Doppler spread is proportional to the maximum DFO and decreases at the rate of √ 1/NT2 + 1/NR2, where NT and NR are the number of transmit and receive antennas, respectively. Simulation results confirm the validity of the proposed Doppler suppression framework for high-mobility V2V communications.
AB - In this paper, we consider fast time-varying channels of high-mobility vehicle-to-vehicle (V2V) communications for massive multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. Large-scale uniform linear arrays (ULA) are configured at the transmitter and receiver to separate multiple angle domain Doppler frequency offsets (DFOs) based on transmit and receive beamforming with high spatial resolution. Then each beamforming branch comprises only one dominant DFO. Next, we perform the conventional channel estimation method for each beamforming branch, and carry out maximum-ratio-combining (MRC) for data detection. Power spectrum density (PSD) and Doppler spread of the equivalent link between the transmitter and receiver are derived and regarded as the criterion for assessing the residual channel time-variation caused by limited antennas in practice. Interestingly, the asymptotic scaling law between Doppler spread and the number of transceiver antennas shows that Doppler spread is proportional to the maximum DFO and decreases at the rate of √ 1/NT2 + 1/NR2, where NT and NR are the number of transmit and receive antennas, respectively. Simulation results confirm the validity of the proposed Doppler suppression framework for high-mobility V2V communications.
KW - Doppler spread
KW - High-mobility V2V communications
KW - OFDM
KW - massive MIMO
KW - time-varying channel
UR - https://www.scopus.com/pages/publications/85173063732
U2 - 10.1109/ICCC57788.2023.10233357
DO - 10.1109/ICCC57788.2023.10233357
M3 - 会议稿件
AN - SCOPUS:85173063732
T3 - 2023 IEEE/CIC International Conference on Communications in China, ICCC 2023
BT - 2023 IEEE/CIC International Conference on Communications in China, ICCC 2023
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2023 IEEE/CIC International Conference on Communications in China, ICCC 2023
Y2 - 10 August 2023 through 12 August 2023
ER -