A Study on a LTE-Based Channel Sounding Scheme for High-Speed Railway Scenarios

This paper studies a novel broadband wireless channel sounding scheme for High-Speed Railway (HSR) scenarios. The proposed scheme employs the downlink signal of Long Term Evolution (LTE) as the excitation signal to acquire the channel impulse responses (CIR) based on the frequency domain method. Then, channel characteristics such as time delay spread, Doppler frequency feature, spatial correlation and directions of departure and arrival can be obtained by the post-processing algorithms. Finally, the verification is performed by comparing the predefined channel models with the derived results.