Frame alignment and time domain equalization for communications systems using multicarrier modulation

Abstract From the Canadian patent

A discrete multitone (DMT) receiver has a time domain equalizer (TDEQ) which is trained during initialization using an estimated channel impulse response (CIR). To, eliminate wrap-around of the estimated CIR relative to the DMT frame alignment, and, to remove leading zeroes the estimated CIR is circularly advanced relative to the frame, alignment for training the TDEQ. In subsequent communications of DMT symbols via, the channel and the TDEQ, the equalized samples of the received DMT symbols are, buffered to compensate, in a frame alignment of the received DMT symbols for , the, advance of the estimated CIR in the initialization process and for a delay in the TDEQ.