A SIGNAL- AND NOISE-MEASUREMENT PROCEDURE FOR AN ANTENNA/RF RECEIVER COMBINATION IN A SHORT-RANGE AUTOMOTIVE COMMUNICATION SYSTEM

摘要

A signal- and noise-measurement test procedure for an RF remote keyless entry (RKE) is presented. RKE systems are often designed for automotive applications, and include an RF receiver along with either an integrated antenna or a separately located external active antenna. Unlike previous methods, the new test procedure presented here allows measurement of the signal and noise levels at the output of an RKE system's RF receiver while the receiver is installed in its usual location on board the vehicle and connected with its antenna. This procedure also solves the problem of obtaining signal and noise measurements in systems with integrated receiver/antenna units.