Patent ID: 8867641

Claim:
A concatenated transmission system comprising: a plurality of OFDM signal generating units configured to generate OFDM signals of OFDM (Orthogonal Frequency Division Multiplexing)-frame structure from unit transmission waves of broadcast transport streams for a plurality of systems, each unit transmission wave being composed of at least one segment; and a concatenate processing unit configured to concatenate the OFDM signals which have been generated from the unit transmission waves by the OFDM signal generating units, wherein a transmission symbol of a frame-head part of each of the OFDM signals that are concatenated differs from a transmission symbol of an adjacent frame-head part, thereby to generate one concatenated OFDM signal, and wherein the OFDM signal generating units arrange pilot signals, each having a specific phase, at a prescribed position in a frame; and the concatenate processing unit displaces the OFDM signals so that the pilot signal for any one of the unit transmission waves is identical in position and phase to the pilot signal for an adjacent unit transmission wave having a lower or higher frequency.