Patent ID: 6760300
Filing Date: 2004-07-06
Classification: H04L

Abstract:
An apparatus for receiving and/or transmitting signals using orthogonal frequency division multiplexing, said apparatus being adapted for outputting a first output signal, comprising:a time synchronisation circuit, being adapted for determination of control information from a first signal in the time domain representation, said first signal comprising at least of a first part being a non-orthogonal frequency division multiplexing signal and a second part being an orthogonal frequency division multiplexing signal, said determination of control information exploiting said first part of said first signal; said time synchronisation circuit, further being adapted for converting said second part of said first signal into a second signal, being in time domain representation; a transformation circuit at least converting said second signal into a third signal, being in frequency domain representation, wherein said frequency domain representations are characterised by a set of carriers, and wherein said transformation circuit comprises a cascade of a fast Fourier transform circuit and a symbol reordering circuit, and said fast Fourier transform circuit performs either a fast Fourier transformation or an inverse fast Fourier transformation; a first frequency domain circuit, at least converting said third signal into said first output signal; and said second signal and said second part of said first signal being orthogonal frequency division multiplexing signals.