Method and apparatus for channel estimation in a multicarrier radio system

摘要

A channel estimator is described for pilot symbol aided coherent detection of multicarrier modulated radio signals in which a single radio channel comprises a plurality of sub channels. The channel estimator is operative to estimate the channel response of sub channels at occurrences of known pilot symbols transmitted in the sub channel, and to interpolate channel responses between occurrences of the pilot symbols in both the frequency direction and the time direction. The two dimensional interpolation, fully exploits the continuity of the channel response in both the frequency direction and the time direction. <IMAGE>