ÓÄÊ 621.396

Detection of coherent sequence of rectangular shape ultra-wideband quasi-radio signal

 

Y. E. Korchagin, K. D. Titov, O. N. Zavalishina

Voronezh State University, University sq. 1, Voronezh 394018, Russia

 

 The paper is received on December 3, 2019

 

Abstract. The most plausible algorithm for detecting a coherent sequence of ultra-wideband (UWB) quasi-radio signals (QRS) of rectangular shape with unknown amplitude and initial phase observed against the background of Gaussian white noise is researched. Among the many UWB signals, a separate most promising class was identified – UWB QRS, the structure of which is similar to narrowband radio signals, but the condition of relative narrowband is not fulfilled for them. It was assumed that the amplitudes and phases of the signal are unknown on the receiving side, but are the same for all pulses of the sequence (coherent sequence). The problem of detecting a sequence of signals against a background of white Gaussian noise was interpreted as a detection problem in the case of multichannel reception. The channels are spaced in time, and the noise in different channels is statistically independent. The structure of the detector was synthesized by the maximum likelihood method and its statistical characteristics were found. The efficiency of detection of the sequence of UWB QRS and the sequence of narrowband radio signals are compared. These results allow us to build an optimal sequence detector of UWB QRS, taking into account the non-narrowband nature of the pulses.

Key words: ultra-wideband, quasi-radio signal, the sequence of quasi-radio signals, ultrashort pulse, detection, estimation of parameters.

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For citation:
Korchagin Y.E., Titov K.D., Zavalishina O.N. Detection of coherent sequence of rectangular shape ultra-wideband quasi-radio signal. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2019. No. 12. Available at http://jre.cplire.ru/jre/dec19/7/text.pdf

DOI  10.30898/1684-1719.2019.12.7