Noise immunity of a binary phase modulated signal demodulator with adaptive configuration change of decision boundaries in a multipath channel

The article considers the possibilities of a coherent phase-modulated binary signal demodulator in a multipath channel with adaptive rotation of a signal constellation. The author determines the rotation angle, which increases the signal distance depending on the information flow of the modulated signal. Moreover, the noise immunity of reception is defined on the basis of statistical distribution functions of signal distances obtained by mathematical modeling on a computer. Therefore, when the signal constellation rotates, the greatest effect is achieved at the maximum intensity of the additional beam. As a result, the research demonstrates the dependence of the rotation efficiency on the intensity of the additional beam.

1. Sklyar B. Tsifrovaya svyaz’. Teoreticheskiye osnovy i prakticheskoye primeneniye [Digital communications. Theoretical foundations and practical application]. 2 nd ed. Moscow, 2016. 1104 p. ISBN 978-5-8459-0497-3. (In Russ.).

2. Sorokhtin M. M., Morozov O. A., Loginov A. A. Adaptivnyy algoritm analiza fazy dlya priyema i dekodirovaniya signalov s fazovoy i chastotnoy manipulyatsiyey [Adaptive phase analysis algorithm for receiving and decoding phase and frequency manipulated signals]. Vestnik Nizhegorodskogo universiteta im. N. I. Lobachevskogo. Seriya: Radiofizika. 2004. No. 1. P. 105–110. EDN: HROXDZ. (In Russ.).

3. Tarasov G. A., Tarasov A. G. Adaptivnaya prostranstvennovremennaya obrabotka FM-signalov v mnogoluchevykh kanalakh svyazi na osnove algoritma Kalmana [Adaptive spatiotemporal processing of FM signals in multipath communication channels based on the Kalman algorithm]. Tsifrovaya obrabotka signalov. Digital Signal Processing. 2009. No. 4. P. 27–32. EDN: KZNCOP. (In Russ.).

4. Kulikov G. V., Do T. T. Effektivnost’ fazovogo algoritma adaptivnoy fil’tratsii pri priyeme signalov s mnogopozitsionnoy fazovoy modulyatsiyey [Efficiency of the phase algorithm of adaptive filtering for receiving signals with multi-position phase shift keying]. Zhurnal radioelektroniki. Journal of Radio Electronics. 2020. No. 4. P. 1–16. DOI: 10.30898/1684-1719.2020.4. EDN: AGARIX. (In Russ.).

5. Nguyen V. D. Pomekhoustoychivost’ korrelyatsionnogo priyemnika signalov s mnogopozitsionnoy fazovoy manipulyatsiyey pri nalichii retranslirovannoy pomekhi [Noise immunity of a coherent reception of signals with multiple phase shift keying in the presence of retranslated interference]. Zhurnal radioelektroniki. Journal of Radio Electronics. 2019. No. 3. P. 1–17. DOI: 10.30898/1684-1719.2019.3.4. EDN: JTTZCA. (In Russ.).

6. Proshchenok E. V., Rodionov A. Yu. Analiz sovremennykh vidov manipulyatsii signala besprovodnykh sistem svyazi [Modern types of signal manipulation analysis of wireless communication systems]. Vestnik SibGUTI. The Herald of the Siberian State University of Telecommunications and Information Science. 2022. Vol. 16, no. 4. P. 43–58. DOI: 10.55648/1998-6920-2022-16-4-43-58. EDN: HCUTGH. (In Russ.).

7. Kazak P. G., Shevtsov V. A. Printsipy postroyeniya energoeffektivnoy sistemy sotovoy svyazi i besprovodnogo shirokopolosnogo dostupa v Internet dlya Arktiki [Principles of design an energy-efficient cellular communication system and wireless broadband Internet access for the Arctic]. Trudy MAI. 2021. No. 118. DOI: 10.34759/trd-2021-118-06. EDN: GDLNKI. (In Russ.).

8. Parshutkin A. V., Buchinsky D. I., Komlyk D. A. Issledovaniye pomekhoustoychivosti priyemnikov signalov s diskretnoy fazovoy modulyatsiyey v usloviyakh pomekh s uglovoy modulyatsiyey i shumov [Investigation of noise immunity of signal receivers with discrete phase modulation in the conditions of interference with angular modulation and noise]. Trudy MAI. 2023. No. 129. DOI: 10.34759/trd-2023-129-16. EDN: ADQAOF. (In Russ.).

9. Fedoseyev V. E., Ivanov M. S. Metodika i rezul’taty analiza potentsial’noy pomekhoustoychivosti priyema tsifrovogo signala na fone manipulirovannoy strukturnoy pomekhi [Technique and results of the analysis of the potential noise stability of reception of the digital signal against the manipulated structural hindrance]. Vestnik Voronezhskogo tekhnicheskogo universiteta. Bulletin of Voronezh State Technical University. 2010. Vol. 6, no. 11. P. 108–112. EDN: MWJJWF. (In Russ.).

10. Nandi M. Symbol error probablity of coherent PSK system in the presence of two path interference. International Journal of Physics and Applications. 2013. Vol. 5, no. 2. P. 133–137.

11. Nasri S. Bit error rate analysis for BPSK modulation in presence of noise and two co-channel interferers. International Journal of Computer Science and Network Security. 2010. Vol. 10, no. 5. P. 152–156.

12. Sidelnikov G. M. Pomekhoustoychivost’ demodulyatora KAM-16 pri transformatsii granits signal’nogo sozvezdiya v kanale s mnogoluchevost’yu [Noise stability of the KAM16 signal demodulator when transforming the boundaries of the signal constellation in a channel with multipath]. Vestnik Novgorodskogo gosudarstvennogo universiteta. Vestnik of Novgorod State University. No. 2 (123). P. 76–81. DOI: 10.34680/2076-8052.2021.2(123).76-81. EDN: RZEDIJ. (In Russ.).

13. Sidelnikov G. M. Pomekhoustoychivost’ demodulyatorov signalov s fazovoy i otnositel’noy fazovoy modulyatsiyey v kanalakh s mnogoluchevost’yu [Noise stability of demodulator of signals with PSK and DPSK in multipath channels]. Omskiy nauchnyy vestnik. Omsk Scientific Bulletin. 2017. No. 5 (155). P. 146–151. EDN: ZUQNKZ. (In Russ.).