TRANSMITTER, TRANSMISSION METHOD, RECEIVER AND RECEPTION METHOD

• Main Authors: SHIMIZU IPPEI, TAGA NOBORU, ONO HIDEKI, FURUKAWA TSUYOSHI, OBATA HARUKA, MASUDA TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 26.08.2022
• Subjects: BROADCAST COMMUNICATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MULTIPLEX COMMUNICATION; PICTORIAL COMMUNICATION, e.g. TELEVISION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

To provide a transmitter transmitting a signal capable of demodulating a signal by a receiver even if the receiver receives a signal from the transmitter not corresponding to an LDM system in addition to a signal from the transmitter corresponding to the LDM system.SOLUTION: A transmitter generates a transmission signal by adding a first signal of a first power level and a second signal of a second power level lower than the first power level, and transmits the transmission signal. The first signal includes a first known signal. The second signal includes a second known signal. The frequency of the first known signal is different from that of the second known signal.SELECTED DRAWING: Figure 3 【課題】受信装置がＬＤＭ方式に対応した送信装置からの信号に加えてＬＤＭ方式に対応していない送信装置からの信号を受信しても、受信装置が信号を復調することができることを可能とする信号を送信する送信装置を提供する。【解決手段】実施形態による送信装置は、第１電力レベルの第１信号と前記第１電力レベルより低い第２電力レベルの第２信号を加算することにより送信信号を生成し、送信信号を送信する。第１信号は第１既知信号を含む。第２信号は第２既知信号を含む。第１既知信号の周波数は第２既知信号の周波数と異なる。【選択図】図３