METHOD AND DEVICE FOR DETERMINING THE CHARACTERISTICS OF THE COMMUNICATION CHANNEL COMPONENTS UNDER LOADING

摘要

(57) To determine the characteristics of the communication channel components, for example, a satellite communication repeater, the pure carrier signal f (t) is modulated with a PN noise signal (PN) and transmitted through the communication channel with a level below the payload signal transmitted through the communication channel simultaneously. The received signal s ′ (t) is correlated by the same pseudo-noise signal PN (t) to obtain the signal of the recovered carrier f ′ (t). Both the pure carrier signal f (t) and the recovered carrier signal f ′ (t) can be used to determine the necessary characteristics. Since the modulated PN carrier signal s (t) is transmitted at a low level, it is possible to perform measurements without turning off the payload signal. The international search report published 1999.08.12.