| 摘要 |
PURPOSE:To remove interference between channels by calculating a difference from the signal generated by diffusing a multiplex signal reversely with diffusion codes of all channels which are bit-shifted by different numbers and performing averaging operation. CONSTITUTION:On a reception side R, reference clocks of M-series codes generated by communication channel C1 diffusion code generators GRY and GRZ are synchronized with a reference clock of M-series codes generated by a diffusion code generator G1 and a multiplex signal X is diffused reversely with the output signal Sn of the diffusion code generator GRY to remove excessive high-frequency components, thereby generating a demodulated signal Y. Similarly, only signal components of information signals A2-An-1 can be obtained over communication channels C2-Cn-1 on the reception side R. Therefore, those frequency spectra contain no DC component. Consequently, even if the DC transmission characteristics of a transmission line 2 are inferior, the multiplex signal X is sent without any deterioration. |
