Patent ID: 6822953
Filing Date: 2004-11-23
Classification: H04B,H04H

Abstract:
A method for transmitting and receiving radio signals by orthogonal frequency division multiplex (OFDM), comprising:transmitting a radio station on various carrier signals; selecting, via a user, a radio station; providing, via radio signals, an identification number for a particular radio station, wherein the radio signals include test symbols with pilot carriers, synchronization signals and useful data signals; determining continuously a signal quality of the selected radio station as a function of carrier signals on which the radio station is received; determining the identification number and the signal quality for the radio station from the radio signals; and using for reception of the selected radio station a carrier signal resulting in a best signal quality; replacing an already presented radio station which is received on a first carrier signal with the same radio station which is received on a second carrier signal without interrupting a presentation by the same radio station if the signal quality of the radio station on the second carrier signal is better than the signal quality of the radio station on the first carrier signal; indicating all carrier signals on which the same radio station is transmitted via data contained in the radio signals; preserving a symbol pulse when a switch is made to the carrier signal via which the same radio station is received as the radio station selected by the user; and determining the signal quality of the radio station received on the received carrier signals via the test symbols.