In this paper, a new transmitter-receiver structure for high speed train (HST) data transmission and detection in fifth generation (5G) communication systems is proposed. This structure employs a new Doppler shift frequency (DSF) estimation approach, projected in this paper, to calculate the channel taps' DSFs at the base station (BS) receiver. The estimated DSFs are used to calculate the channel taps' angle of departures (AoDs). Considering the estimated AoDs, the transmitter beamformer regulates its coefficients to suppress the non-line of sight channel taps (NLoSCTs) and a DSF compensation block is employed to alleviate the line of sight channel tap's (LoSCT's) DSF. The proposed DSF estimation approach is a two-phase scheme which obtains a coarse estimation of DSFs at the first phase and calculates DSFs more accurately at the second phase. While this two-phase DSF estimation approach is able to estimate DSFs in both multipath rich and Rician channel models, an alternative DSF estimation scheme for Rician channel models is proposed which can estimate the LoSCT's DSF with much lower computational complexity compared to the two-phase DSF estimation method. Simulation results indicate the fidelity of the proposed DSF estimation methods and the proposed transmitter-receiver structure.

本文提出了一种用于第五代（5G）通信系统中高速列车（HST）数据传输和检测的新型收发器结构。该结构采用了本文提出的一种新的多普勒频移（DSF）估计方法，以计算基站（BS）接收机处的信道抽头的DSF。估计的DSF用于计算通道抽头的偏离角（AoDs）。考虑到估计的AoD，发射机波束形成器调整其系数以抑制视线通道抽头（NLoSCT）的非线，并且采用DSF补偿块来减轻视线通道抽头（LoSCT）的DSF。所提出的DSF估计方法是两阶段方案，其在第一阶段获得DSF的粗略估计，并在第二阶段更准确地计算DSF。尽管此两阶段DSF估计方法能够估计多径丰富和Rician信道模型中的DSF，但提出了一种用于Rician信道模型的替代DSF估计方案，该方案可以估计LoSCT的DSF，且计算复杂度比两阶段低DSF估算方法。仿真结果表明了所提出的DSF估计方法和所提出的收发器结构的保真度。提出了另一种用于Rician信道模型的DSF估计方案，该方案可以估计LoSCT的DSF，其计算复杂度比两阶段DSF估计方法低得多。仿真结果表明了所提出的DSF估计方法和所提出的收发器结构的保真度。提出了另一种用于Rician信道模型的DSF估计方案，该方案可以估计LoSCT的DSF，其计算复杂度比两阶段DSF估计方法低得多。仿真结果表明了所提出的DSF估计方法和所提出的收发器结构的保真度。