Patent ID: 6741866
Filing Date: 2004-05-25
Classification: H04B,H04L,H04W

Abstract:
Process for performing in operation fade margin tests in a radio relay system under interference from other radio sources, the relay system having a transmitter (TX) and a receiver (RX), the transmitter and receiver having forward error correction means (EM) for performing error correction of the received signal and means for providing a means of the forward error correction activity (FCA), the process involving a first routine comprising the following stepstransmitting at nominal output power, decreasing the output power level of the transmitter gradually until the forward error correction activity reaches a predetermined value (FCA1), while continuing communicating, determining a signal level (Rfin1, Pout1) related to the reduced output power level, determining a fade margin test value (FM) as the ratio of the measured signal level corresponding to the predetermined forward error correction value (FCA1) and a predetermined reference level (Rfin0; Poutnom) increasing the output power to nominal output power.