Feasibility Studies on the Use of Higher Frequency Bands and Beamforming Selection Scheme for High Speed Train Communication

Algorithm 1

Proposed beamforming selection scheme (PBSS).

   Input:

   BS retrieves initial HST position

   BS retrieves estimated velocity of the HST

   BS retrieves geometry of track and have

   Initialization:

   *: number of MRNs on the HST*

()  for    do

()   BS uses based on initial location

       Train uses based on initial location

    Iteration:

    *TTI: transmission time interval*

()  for  each TTI  do

()  for    do

()    

()  

   * : number of beam direction in codebook*

()  while    do

()      

()       Start    count down in nanoseconds

()    if    then

()      for    do

()        BS uses next    based on initial

        location

        Train uses    based on initial location

()      

()      Continue

()  Update