Yu.E. Korchagin – Dr.Sc.(Phys.-Math.), Associate Professor, Head of Department of Radiophysics,  Voronezh State University

E-mail: korchagin@phys.vsu.ru

K.D. Titov – Ph.D.(Phys.-Math.), Assistant, Department of Radiophysics, Voronezh State University E-mail: titovkd@gmail.com

We synthesized the maximum likelihood algorithm for detecting a coherent sequence of ultra-wideband quasi-radio signals of arbitrary shape with unknown amplitude and initial phase observed against the background of Gaussian white noise. We found the structure and statistical characteristics of the detection algorithm. Comparison of the detection efficiency of a sequence of ultra-wideband quasi-radio signals and a sequence of narrow-band radio signals was performed.

In the article considered quasi-likelihood algorithm detection of ultra-wideband quasiradiosignal of a arbitrary waveform with unknown amplitude, initial phase and duration. Under the ultra-wideband quasiradiosignal is understood the signal, the structure of which is similar to narrowband radiosignal without performed relatively narrow bandwidth condition. Proposed flowchart quasilikelihood detector. A block diagram of the maximum likelihood detectors of sequences of ultra-wideband quasiradiosignals and narrowband radiosignals was proposed. The analysis of the synthesized detection algorithm was performed, the false alarm probability and missing probability was found. It is shown that expressions for false alarm and missing probabilities of a coherent sequence of ultra-wideband quasiradiosignals match the same expressions for a single ultra-wideband quasiradiosignal with the difference that the signal-to-noise ratio in power increases in proportion to the number of pulses in the sequence. Depending on the initial phase, the efficiency of optimal detection of ultra-wideband quasiradiosignals cattle can be either higher or lower than the detection efficiency of a sequence of narrowband radiosignals.

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