Patent ID: 8340238

Claim:
A system for transmitting and receiving time-multiplexed signals, comprising: a transmitting arrangement including at least first and second OFDM transmitting devices which can each emit OFDM radio signals on at least one carrier frequency; wherein: the OFDM transmitting devices each includes a synchronization unit, each of which serve to synchronize with one another the frames of the OFDM signals emitted by the OFDM transmitting devices; and the OFDM signals transmitted by the OFDM transmitting devices possesses successively transmitted time-related frames having OFDM symbols that are variously coded, wherein each frame begins with a synchronization null symbol for coarse synchronization of the frame, a data symbol that contains additional data, including a transmitter identification list, and multiple subchannel symbols each of which is associated with a specific program source; an OFDM receiving unit located in a receiving region of the first OFDM transmitting device and the second OFDM transmitting device and capable of receiving the OFDM signals on each of the at least one carrier frequencies; and a context changing unit operatively coupled to the OFDM receiving unit for switching, for the duration of a data symbol in a frame of the first time-multiplexed signal on the first carrier frequency, to reception of the second time-multiplexed signal on the second carrier frequency, so that the OFDM receiving unit can receive an OFDM signal on another carrier frequency, so as to receive and evaluate the data symbol of the OFDM signal on the other carrier frequency to obtain the data coded therein, wherein this switchover by the OFDM receiving device is performed only outside a time window during which the useful symbol containing the useful data for reception of the selected program source are being performed.