| 摘要 |
PURPOSE:To effectively utilize a frequency by realizing a modulated frequency as a value dividing entire transmission capacity T with a value, which is not a natural number such as 5/2, 7/3 and 7/2 or the like and utilizing an excess band by transmitting information as the combination of plural phase planes. CONSTITUTION:In the case of N=2, M=4, P=1, Q=1, A1=24 and A2=24 for the N number (two) values A1 and A2, a transmitting data train conversion circuit 10 converts a transmitted signal 100 to 9 (MXN+P) trains of transmitting data trains 1. A data conversion circuit 1 converts the transmitting data trains 1 to the two pairs (N pairs) respectively having the 5 (M+Q) trains of transmitting parallel data trains 2A and 2B. A parallel/serial conversion circuit 12 converts the transmitting parallel data trains 2A and 2B to the 5 (M+Q) trains of transmitting serial data trains 3. A multilevel modulation circuit 13 executes 24-value multilevel orthogonal modulation according to the 5 trains of the transmitting serial data trains 3 and outputs a modulated signal 4. From the modulated signal 4, a received signal 101 is reproduced through a multilevel demodulation circuit 23, serial/parallel conversion circuit 22, inverse conversion circuit 21 and data train number inverse conversion circuit 20. |
