TRANSMITTER, TRANSMISSION METHOD, RECEIVER UNIT AND RECEPTION METHOD

• Main Authors: SHIMIZU IPPEI, TAGA NOBORU, ONO HIDEKI, YODA DAIKI, OBATA HARUKA
• Format: Patent
• Language: English; Japanese
• Published: 17.12.2020
• Subjects: BROADCAST COMMUNICATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MULTIPLEX COMMUNICATION

To provide a transmitter and a transmission method where demodulation is less likely to delay on the receiving side, and to provide a receiver unit and a reception method where demodulation is less likely to delay.SOLUTION: A transmitter transmits a first modulation signal and a second modulation signal while summing. First symbol number of the first modulation signal is equal to or less than the second symbol number of the second modulation signal. The first symbol number is a value obtained by dividing the larger one of a first bit number representing the unit of first interleave processing and a second bit number representing the code length of an error correction code of the first modulation signal, by the logarithm of first modulation multilevel number of the first modulation signal of 2 bottom signal, when the first modulation signal is subjected to first interleave processing, and is a value obtained by dividing the second bit number by the logarithm of first modulation multilevel number of the first modulation signal of 2 bottom, when the first modulation signal is not subjected to interleave processing. The second symbol number is also a similar value.SELECTED DRAWING: Figure 4 【課題】 受信側で復調に遅延が生じにくい送信装置及び送信方法、並びに復調に遅延が生じにくい受信装置及び受信方法を提供すること。【解決手段】 実施形態による送信装置は、第１変調信号と第２変調信号とを加算して送信する。第１変調信号の第１シンボル数は、第２変調信号の第２シンボル数以下である。第１シンボル数は、第１変調信号が第１インタリーブ処理されている場合は、第１インタリーブ処理の単位を表す第１ビット数と第１変調信号の誤り訂正符号の符号長を表す第２ビット数のいずれか大きいビット数を、２を底とする第１変調信号の第１変調多値数の対数で割った値であり、第１変調信号がインタリーブ処理されていない場合は、第２ビット数を、２を底とする第１変調信号の第１変調多値数の対数で割った値である。第２シンボル数も同様な値である。【選択図】図４