ANALYSIS, SIMULATION AND TESTS OF INTERFERENCE BETWEEN DIGITAL CARRIERS

Interference caused by a digital carrier or carriers into another digi tal carrier is a common type of interference in satellite communicatio n systems. So far this type of interference has generally been assumed to be noise-like. Since the probability distributions of digital carr iers and Gaussian noise are dissimilar, the validity of this assumptio n needs to be re-examined. The mechanism of interference caused by dig ital carriers has been analysed in this paper for a variety of situati ons, including single and multiple-carrier interference, wideband inte rference into a narrowband carrier and narrowband interference into a wideband carrier. The impact of other types of interference has also b een evaluated for comparison purposes. The quantitative difference bet ween the original digital interference and its noise-like equivalent h as been defined by computer simulation and further verified by laborat ory tests. (C) 1998 John Wiley & Sons, Ltd.