Patent ID: 7489622

Claim:
A communication system for transmitting and receiving a plurality of channels of multi-carrier modulated signals each created in accordance with transmission data, comprising: a transmission path estimation method selection circuit for each channel for selecting a transmission path estimation method in accordance with an attribute of said transmission data, a mapping circuit for each channel for arranging signal points based on said transmission data by modulation methods set with respect to a plurality of sub-carriers, a transmission path estimation processing circuit for each channel for signal processing for estimating the transmission path in accordance with said selected transmission path estimation method for an output signal of said mapping circuit, a multiplex circuit for multiplexing output signals for each channel from each transmission path estimation processing circuit and outputting a multiplexed signal a reception circuit for receiving a transmission signal from said transmission path, a first orthogonal transform circuit for orthogonally transforming the multiplexed signal from said multiplex circuit, a transmission circuit for transmitting an output signal of said first orthogonal transform circuit to the transmission path, a second orthogonal transform circuit for orthogonally transforming an output signal of said reception circuit, a transmission path estimation circuit for estimating a characteristic of the transmission path based on processing of an estimation of the transmission path carried out by said transmission path estimation processing circuit based on the output signal of said second orthogonal transform circuit, and a data output circuit for correcting said signal received by said reception circuit in accordance with the result of the estimation of said transmission path estimation circuit and outputting the predetermined received data, and a deinterleave circuit for rearranging the data in an output signal from data output circuit to restore the data to an original order.