Patent ID: 7706461

Claim:
A communication method, comprising: transmitting a multipath characteristic measurement signal and a plurality of data transmission signals from a transmitter device of a communication system, the multipath characteristic measurement signal and data transmission signals being received by a reception processing device of the communication system, wherein, in the reception processing device, the multipath characteristic measurement signal and data transmission signals are a signal array formed by a plurality of coefficient matrices each having row vectors that are orthogonal to one another within the matrices and which comprise at least one coefficient array that is common in the column direction or row direction; and the multipath characteristic measurement signal formed by the respective coefficient matrices is the same signal array formed by the at least one common coefficient array, wherein a multipath characteristic measurement signal array is formed by using one row vector or column vector coefficient array with respect to the multipath characteristic measurement signal, and, by forming a data transmission signal array by using a row vector coefficient array that is orthogonal to the row vector or a column vector coefficient array that is orthogonal to the column vector with respect to the plurality of data transmission signals, the transmitted multipath characteristic measurement signal and plurality of data transmission signals are uncorrelated.