Study of MIMO-GFDM in VehicularCommunications

• Main Authors: Pei-Hao Liu, 劉沛豪
• Other Authors: Fang-Biau Ueng
• Format: Others
• Language: en_US
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5441045%22.&searchmode=basic

碩士 === 國立中興大學 === 電機工程學系所 === 107 === In this paper, we mainly discuss the challenges faced by vehicle communication. Since the vehicle communication is composed of several channels, it includes the primary safety channel, control channel (CCH) and other service channels (SCHs). The magnitude of the out-of-band emission (OOB) can interfere with adjacent channels, this will be a problem. Since the relatively high differential speed between the vehicles travels, high time-varying and high-frequency selective channels are caused, which causes the channel information of the channel to be estimated to pass after several symbols, which may cause demodulation errors in the receiver. At the same time, the high time varying and high frequency selective channels cause synchronization errors for the coherent receiver and thus increase the error rate. This paper uses generalized frequency division multiplexing (GFDM) technology which use a pulse-shaping filter-based architecture with lower out-of-band emission and fewer cyclic prefixes relative to orthogonal frequency division multiplexing (OFDM). At the same time, constructing MIMO-GFDM by spatial multiplexing to increase the amount of data transmission. And using embedded pilots for synchronize estimation and channel estimation, channel estimation in this way can have similar error rate performance at different relative speeds. At the same time, the frequency domain equalizer scheme can handle interference between antennas (IAI). The simulation results show that our proposed scheme performs better at different relative speeds.