| 摘要 |
A Signal Strength Indicator for Digital Systems is disclosed. The Indicator is based on the output of the correlation operation performed in the synchroniser of a digital receiver. In particular, the correlator output indicating the position and timing of the guard intervals in the digital signal, is used as a measure of signal strength. Indicator means, such as a numerical display, graphical display, or indicator light, give an indication of the signal strength to the user. Various techniques are employed to improve the accuracy of the signal strength indication, such as discerning between a digital signal and noise or other kind of signal. Thus, the invention has application to the Digital Radio Mondiale (DRM) system. |
