| 摘要 |
FIELD: communications engineering. SUBSTANCE: device has maximum-length sequence generator that generates maximum-length sequences according to code seed of maximum-length sequence whose length equals 2S-1 and preset initial value, and reboots initial value each time when maximum-length sequence whose length is shorter than 2S-1, is generated thereby affording multiple generation of maximum-length sequence. This is attained due to the fact that mask choice device incorporating first and second masks having desired shift undertakes choice of first mask within short period of maximum-length sequence and choice of second mask within other period. Modulo two adder functions to add output signal of maximum-length sequence generator to output signal of mask choice device thereby generating expansion code and cutting off maximum-length sequence upon arrival of second mask. EFFECT: provision for multiple execution of maximum-length sequence generation. 4 cl, 5 dwg, 1 tbl |
