Institute of Electrical & Electronic Engineers
Discrete Fourier Transform (DFT) based Channel Estimation (CE) has been widely studied as a practical CE scheme over the OFDM based wireless systems. The conventional DFT-based channel estimation utilizes a transform domain cut-off filter to suppress the noise in the time domain. However, this method can suffer significant performance loss due to the Channel Impulse Response (CIR) energy leakage, especially when the available pilot sub-carriers are confined to a small portion of the system bandwidth. In this paper, the authors propose an enhanced DFT-based channel estimation technique for the Long Term Evolution (LTE) based cellular uplink.