| 摘要 |
<p>The invention relates to a wireless local area network system comprising data terminals and transceivers which communicate with the data terminals and transmit and receive data, for forming a wireless link between at least two data terminals, the system transmitting data as outputs in a certain frequency range. The output comprises a signal (B) which is visible as a narrow-band signal in the frequency range of the output. The signal (B) can be detected from farther away than a conventional output by arranging means (7, 8, 9) in the local area network system for filtering and detecting the narrow-band signal of a certain frequency from the received signal.</p> |
