OFDM SIGNAL TRANSMITTER, OFDM SIGNAL RECEIVER, OFDM SIGNAL TRANSMISSION METHOD, OFDM SIGNAL RECEPTION METHOD AND CHIP

摘要

PROBLEM TO BE SOLVED: To add a new layer for 2 layer structure by an FDM system consisting of a fixed hierarchy and a mobile hierarchy, when performing hierarchical transmission of OFDM signal by multiplexing multiple layers.SOLUTION: A power calculation unit 12 of an OFDM signal transmitter 1 calculates power parameters Pand Pbased on a preset power ratio G. An LDM multiplex unit 14 performs hierarchy division multiplex of the data carrier of mobile hierarchy multiplied by the power parameters P, and the data carrier of additional hierarchy multiplied by the power parameters P. An FDM multiplex unit 16 performs frequency division multiplex of the data carrier of fixed hierarchy, and the data carrier of the mobile hierarchy and additional hierarchy subjected to hierarchy division multiplex by FDM system. An OFDM frame unit 18 generates data carrier after frequency division multiplex, and an OFDM frame containing control information of power ratio G, or the like.SELECTED DRAWING: Figure 2