Maximum Doppler Shift Identification using Decision Feedback Channel Estimation

Doppler shifts are a common occurrence in high mobility environments as a result of the relative motion of the transmitter and receiver. Inter-carrier interference (ICI) is a result of this, which affects communication quality and emphasizes the need for adaptive communication systems beyond 5G and 6G. The most extreme of estimation method, which inserts pilot signals at the leading and last portion of the communication packets, enables highly precise estimation. However, this method has serious latency problem because of the pilot signals inserted at the last portion of the communication packet. In this paper, we proposes a novel estimation method for the maximum Doppler shift identification using decision feedback channel estimation (DFCE). Our proposed method can identify the channel and compensate the faded signal. In this case, we can use the defeated signal as a reference signal. Therefore, our proposed method can estimate the Doppler shift without any additional pilot signal at the last portion of the communication packet.