| 摘要 |
<p>Apparatus for extracting communications signals from power lines, which lines are arranged such that leakage of signals occurs between them. The apparatus receives a signal from each of at least two of the lines (BLUE, RED, YELLOW) and combines the received signals so as to increase the ratio of wanted signal to interference plus noise S/(I+N). Preferably the combining is achieved by weights (WB, WR, WY) and a summer (400). The weights phase shift and scale the received signals in amplitude. The apparatus can also be used for transmitting in the downstream direction.</p> |
