| 摘要 |
PURPOSE:To enable to transmit digital modulation wave efficiently by obtaining the predicted signal showing the prediction value of digital signal output from the absolute value circuit after one sampling interval from the output at present time of the absolute value circuit. CONSTITUTION:The digital modulation wave in n-bit per one sampling incoming to the terminal 7, is stored in the shift register 8 and fed to the absolute value circuit 9 for the absolute value. The output of this circuit 9 is delayed by one sampling interval or more at the delay register circuit 10, then it is fed to the adder 12 and added with the signal at present time from the circuit 9. Thus, the output signal of the circuit 12 is fed to the multiplier 13 as the difference signal and it is multiplied with the weighting coefficient from the coefficient device 14. Further, the output from the multiplier 13 is fed to the adder 15, and it is added with the output of the circuit 9 to obtain the prediction signal representing the prediction value of digital signal outputted from the circuit 9 after one sampling interval from the output at present time from the circuit 9. Thus, the transmission of digital modulation wave can be made efficiently. |
