Performance monitoring of antijam satellite communication network

摘要

A scheme for monitoring the performance of a multiple access satellite communication network, particularly an antijam pseudo-noise spread code division multiple access network, operational in the presence of one or more up-link jammers having arbitrary waveforms, wherein the probability of error (or some directly related quantity) in the output data is considered to be the measure of link quality. Measurements on signal quality received over a selected (strong) link are performed at a prescribed (control) terminal. Such measurements include deriving a statistical mean and variance of decision voltages on a symbol-by-symbol basis. The measured means and variances are processed to account for differences in the link parameters of any desired link and the link used for measurement. The means and variances for the desired link are further processed to give output error probability, accounting for any error correction decoding in use. The desired link may be one of the actual links in the network or another link whose parameters differ from the links of the network.