| 摘要 |
A method for modulating a binary data stream into a code format suitable for encoding information that employs a non-return-to-zero (NRZ) technique. The method consisting in: (1) defining a bitcell as the time t between two adjacent clock transitions; (2) writing a first clock transition at the beginning of the bitcell; and (3) encoding a binary data transition in the ratio of td/t, where td is the time duration between the first clock tansition and the data transition, with the proviso that td/t NOTEQUAL 1/2. Preferably, the ratio td/t < 1/2 encodes a data 0 bit, and the ration td/t > 1/2 encodes a data 1 bit. The method is specially advantageously employed where the information transfer rate is dependent on unpredicable and variable transfer rate velocities and accelerations. |
