| 摘要 |
PURPOSE:To reproduce correctly two code strings instantly, by using a disturbance (CRV) of the code regularity of a high speed code string to reproduce correctly the 2nd code string in transmitting a pulse while superimposing a low speed code. CONSTITUTION:One word consists of two blocks, and when the low speed code string is changed in the polarity of code in the direction of ''1'', the regularity of the selection of the preceding block in the word is disturbed and when the polarity of code is changed in the direction of ''0'', the regularity of the selection of the succeeding block in the word is disturbed. When the 2nd code string 103 is superimposed on the original CMI (code mark inversion) code string 102 according to the direction, the code string 201 is obtained. Further, the 202 in Figure shows the location of block where the regularity of selection of block is disturbed. The code string 201 is received at the receiving side to use the word synchronism and it is detected that the disturbance of the regularity of the selection of block in the word takes place in the preceding block or the succeeding clock to discriminate the change in the ''1 '' or ''0'' direction of the 2nd code string superimposed on the code string 201. |
