| 摘要 |
PROBLEM TO BE SOLVED: To decrease error rate and to increase data rate by actualizing such a communication method that the amplitude of a base band signal represents antennas that respective columns constitute, respective rows are represented as a matrix showing individual time intervals, and the matrix is proportional to a matrix whose columns are orthogonal. SOLUTION: Respective transmit signals are sets of M vectors in a temporal viewpoint, have length T, and accompany transmitting antennas. Those are all a notation system which is proportional to a matrixϕl of T×M. All the columns of each matrixϕl are regularly orthogonal and the base band signal is Sl=(TP (mean electric power sent to each antenna))1/2ϕl. The base band signal is inputted to the transmission array of antennas 15.1 to 15.3 and transmitted to the reception array of antennas 20.1 and 20.1. A singular value is a measure with which different M partial spaces of a T-dimensional space are generated from a linear combination of M columns of an unprime matrix. As the singular value is smaller and smaller, nonsimilariaty becomes larger and larger.
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