AUTOMATIC SELECTION OF COHERENT AND NONCOHERENT TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM

摘要

Based on coherent transmission mode or the noncoherent transmission mode is estimated Doppler frequency shift due to the movement of the mobile terminal to be automatically selected for transmission. If a pilot signal overhead is not excessive to uniquely characterize the screen to the Doppler frequency shift in the sub-carrier frequency time relative velocity result is coherent mode is selected in. A noncoherent mode is selected if the excess screen to the pilot signal overhead is uniquely characterized by a Doppler frequency shift at higher carrier frequency times relative velocity results. Both coherent and noncoherent mode both silent mode has advantages with respect to each of their respective carrier frequency time relative velocity region. ;