Abstract: High Speed Trains (HST) is a wonderful way for transporting that raised more attention in wireless communication system within great speed environments. Numerous experiments of HST till 450 km/h are done around the world. The investigation of performance for standard structure design is concentrates on mobile system in the urban with respect of speediness. There are more factors that effect on the activity of this system but the most important effect is the Doppler shift frequency which becomes essential factor that corrupting the performance of the system which increases errors of received signal. The aim of this study is to demonstrate the robust of the system that is serve in HST by investigate the throughput with the Bit Error Rate (BER) for the signal that is transferred from the antenna and which error will be occurred with the same signal when it is received by the user outside or inside the train. The tests are done within different circumstances and variable cases in order to measures the powerful of this system. The results show that the system provides a high throughput with lower BER with variable parameters such as number of antennas, doppler shift frequency and reference channels.