Increasing of Wireless Frequency Usage Efficiency Using Orthogonal Signal Division Multiplexing with Multiple Antennas

Suehiro, et al. have proposed a new information transmission method using the Kronecker product between the rows of DFT matrix and the data sequences. It has been shown that the method has far better error probability property than OFDM method under the heavy multipath environment by a simulation under the stable multi-path environment. Because the 16 QAM system of the new method has almost the same error performance with the QPSK. system of the OFDM method, the new method can be regarded as two-times more efficient method than the OFDM method from the view point of wireless frequency usage efficiency. In this paper, the authors show the new method is fittable to multiple-antenna systems and the K antenna/K antenna system has almost 2K times larger wireless frequency usage efficiency than the single antenna OFDM system.