| 摘要 |
1. In combination, a secrecy signaling system for transmitting a polarity modulated message pulse series from a transmitting station to a receiving station including scrambling pulse generating means at both said stations, to produce a pair of identical scrambling pulse series, for scrambling and unscrambling, respectively, said message pulse series, scrambling pulse converting means at each of said stations to convert a scrambling control pulse series of arbitrarily varying polarity into a final scrambling pulse series, said converting means comprising a pulse shift register having a plurality of cascade-connected pulse storage stages and an input fed by said control pulse series, at least one feedback circuit connecting the output of a first one of said stages to the input of a second preceding stage of said register, and at least one logical circuit interposed in the path of said feedback circuit, to produce final scrambled pulses at the output of said register. |
