Study of interference resistance of autocorrelative receiving methods in broadband communication systems

DOI: 10.31673/2412-9070.2022.054046

Abstract

Modern broadband communication systems are not able to completely eliminate the effects of interference characteristic of various communication channels, namely interference caused by the multipath nature of signal propagation and concentrated interference which reduce the reliability of information transmission. Although the picture is qualitatively clear, the variety of interference and the specificity of the impact of some of them on broadband communication systems do not allow one to quantitatively take into account the impact of all interference at the same time. Therefore, there is a need to study the issue of increasing immunity to various reception methods.
This article is devoted to the study of methods of increasing immunity to interference in broadband communication systems with fluctuating interference using autocorrelation methods of reception. The probability of errors in a multi-position system with orthogonal signals at incoherent reception with incoherent accumulation is investigated. Probabilities of errors during autocorrelation reception of signals with single phase-difference modulation are analyzed. The article defines that the immunity of intercorrelation methods of reception does not depend on the base of the signal, and the immunity of autocorrelation methods depends on the base and at the same energy is lower in the signal with a larger base (larger number of elements).
The results of the work characterize the interference immunity of multi-position systems with different reception methods and the dependence of the immunity of a group of autocorrelation reception methods on the number of elements N or the FT base of the composite signal. According to the results of the work, the composite signals from the FRM in all reception methods provide a gain in energy twice as compared to the systems with orthogonal signals.

Keywords: broadband communication systems; interference resistance; autocorrelative receiving; fluctuating interference.

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