Blind Maximum Doppler Frequency Estimation Based on Channel Frequency Response Envelope PSD in OFDM Communication

A new blind maximum Doppler frequency estimation algorithm is proposed based on channel frequency response envelope power spectral density(PSD) in orthogonal frequency division multiplexing systems.The subcarriers modulated by constant-envelope modulation are utilized.The PSD of received subcarriers magnitude is estimated by classic periodogram method.The maximum Doppler frequency is derived by searching the edge of envelope PSD and noise PSD.It does not need channel estimation used in conventional PSD method.Simulation shows that the estimation precision is increased and the performance is robust in a wide range of Doppler spread values.