Abstract
In this paper, we synthesize and analyze algorithms for detecting ultra-wideband quasi-radio signals against the background of Gaussian white noise and interference with linear frequency modulation under various a priori uncertainty conditions. Among the many UWB signals, a separate most promising class was identified – UWB QRS, whose structure is similar to narrowband radio signals, but the condition of relative narrowband for them is not fulfilled. A linear frequency modulation signal is considered as an interference when estimating the effectiveness of the detector of a UWB QRS. The selected interfering signal can be either intentional or unintentional, and is of the greatest interest to consider, since it has a similar structure to a useful signal and have the greatest destructive effect on correct reception. The dependence of the signal omission probability on the interference parameter and the interference-to-signal ratio is obtained, which allows to increase the detection efficiency by several orders of magnitude. A comparative analysis of the resistance to interfering signals of various detector circuits is performed. Recommendations are formulated to improve the efficiency of detectors operating in a complex interference environment, destabilizing information and technical influences, or attempts to unauthorized access to information.
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