Channel re-estimation in communication systems

摘要

It is described a communication system having a transmitter and a receiver communicating over a channel. The estimated channel state information can be improved by channel reestimation while taking into account correctly decoded symbols as pilot symbols. Computational problems may be avoided by rotating the symbols on the diagonals of the matrix of the symbols to be transmitted so as to ensure that the matrix is a full-rank matrix. On the receiver side the symbol rotation is inverted, thus yielding the original symbols.