| 摘要 |
The present invention concerns a method and an apparatus for extracting a low jitter power detect (PD) signal appropriate for burst dat transmission systems. The method is operative in a detector structure which is essentially characterised by a sophisticated thresholdinng logic producing the PD signal based on the value of a measured power signal and an approximation to the derivative of this signal. An extension of this structure incorporates information of data burst length and guard time in a frame control logic implementing a binary filtering on the PD and controlling the threshold values. A variation of the frame control logic exchanges simple messages with a collision control logic reducing drastically the number of wasted data bursts in communication systems employing asunchronous random access protocols. The invention more particularly applies to wired and wireless TDMA access systems, to satellite links, and to mobile ratio andoptical communications. |
