| 摘要 |
<p>PURPOSE:To improve economical efficiency and reliability due to decrease in the number of required parts by inputting a product obtained by multiplying the result of the first operation by a twist coefficient to the same discrete Fourier transform arithmetic unit (DFT). CONSTITUTION:Data taken out r at a time in the direction of column from the first and change circuits CT22 are supplied to a DFT20 through a switching circuit 23. The switching circuit 23 switches outputs of the first CT22 and outputs of the second CT24 at every tauhr of the DFT20 and leads to the DFT20. Outputs of the DFT20 are switched at every tauhr, and arithmetic outputs of data from the first CT22 are inputted to a multiplier 25, and outputs of data from the second CT24 are inputted to an output register 28. Output data of r in number, of the multiplier 25 are stored in the second buffer 27, and transferred to the second CT24.</p> |
