| 摘要 |
<p>57 A Local Area Network consists of a number of stations A, B, C, D connected together by a transmission line (3), each station having a transmitter (1) and a receiver (2). A transmitter (1) generates a sequence of information signals having individual message portions separated from one another by flag signals, each message portion having a predetermined number of symbols. A receiver (2) processes a message portion by analysing the content of each section formed by dividing the message portion into the predetermined number of equal parts. The receiver 2 includes stores (7) and (11), a detector (8), a signal-divider (9) and a unit (10) which determines a representative value.</p> |
