| 摘要 |
<p>Probabilistic scrambling, and the complementary probabilistic descrambling, for purposes of assuring reasonably frequent transitions in a transmitted signal for the purposes of receiver clocking. The transmitter (30) is provided with apparatus (16) for generating one or more different seeds. For transmitting any particular message, a seed is selected. The seed is generated randomly in order to increase the probability of successful transmission. The seed is used to generate a scrambling bit sequence which is combined with the data for transmission to generate a transmitted signal. The transmitted signal include at least some information identifying the scrambling bit sequence or the particular seed used for generating the scrambling bit sequence. Preferably, the seed itself (in scrambled or unscrambled form) precedes the scrambled data. At the receiver, (40) this seed is used to generate a complementary descrambling bit sequence which is combined with the received data to generate the original data scrambled at the transmitter (30).</p> |
