| 摘要 |
PURPOSE:To generate white noise and pink noise by using an M series (Maximum Length) random number generating method in a DSP (digital signal processor). CONSTITUTION:The method consists of a 1st step in which an initial value is transferred to A1 and A2 registers, a 2nd step in which the content of the A1 register is transferred to a D1 register being an accumulator and the content of the D1 register is shifted logically left by (K-L) bits, a 3rd step in which the content of the A1 register and the content of the D1 register are exclusively ORed and the result is stored in the D1 register, a 4th step in which the content of the D1 register is shifted logically right by (K-L) bits, a 5th step in which the content of the A1 register and the content of the D1 register are ANDed and the result is stored in the D1 register, a 6th step in which the content of the D1 register is transferred to the A1 register and the initial value is transferred from the A2 register to the D1 register, and 7th and 8th steps in which the content of the D1 register is shifted logically left by L-bits and the result is ORed with the content of the A1 register. |
