| 摘要 |
PURPOSE:To obtain a code sequence conforming with a transmission line without deteriorating the transmission efficiency, by inserting a synchronizing bit of 1 bit into a pseudo random code sequence. CONSTITUTION:As for a pseudo random code generated from a shift register having feedback of (n) stages, 2<n>-1 bit length is 1 period. To this pseudo random code, a synchronizing bit of 1 bit is added. As a pseudo random code assigned to each subscriber, that which has shifted the pseudo random code of the same code pattern by 1 bit each is assigned in order. As for the pseudo random code including the synchronizing bit, too, the correlation becomes ''0'' in 1 period, the number of positive and negative bits is made same within 1 period, and a DC component is removed. |
