繁樹 森山

TL;DR: In this article, the transmission information is classified by an information classification circuit 8 depending on the importance of information and the important information is sent by using the SS transmission methods 2, 5 and the other information was sent using the OFDM transmission methods 3, 7.

TL;DR: In this article, the authors proposed a retransmitter capable of reducing bandwidth when a digital broadcast signal is retransmitted, where a plurality of receiving parts are provided with a carrier selection circuit for selecting at least one of segments in the received digital broadcast signals, by channels, on the basis of a preset segment number.

TL;DR: In this article, the authors proposed to send each OFDM modulation signal at a maximum bit rate per a transmission frequency band by allocating a transmission band in a form that an adjacent spectrum is in contact with spectrums of each OFD modulation signal and locking a symbol clock phase.

TL;DR: In this article, the authors proposed a receiver for ground digital broadcast that reduces a time for frame synchronization establishment that is the main cause to a delay time when a channel is switched, in order to set up frame synchronization in a short time even at broadcast channel switching.

TL;DR: In this paper, a mapping memory circuit 3 and the content of correspondence between complex data and each carrier is set to the circuit 3 as a mapping pattern to be registered therein so as to set freely the power of each carrier and the modulation system.