Hu Boxiong1, Dong Ge2, E.N. Smirnova3, S.B. Makarov4, A.S. Korotkov5

1,3−5 Peter The Great St. Petersburg Polytechnic University (Saint-Petersburg, Russia)

1,2 School of Aerospace Engineering, Tsinghua University (Beijing, China)

Formulation of the problem. Monitoring systems are characterized by ultra-low power consumption of equipment, minimal dimensions and cost. This implies transmission over short distances, which allows the use of a system of ultra-short duration pulsed signals without a carrier wave with the OOK modulation scheme. Signal processing is usually done with a power receiver. One of the problems in the reception of such signals is that signals from other information transmission systems (cellular communication, WiFi, etc.) fall into the considered frequency range, which can interfere with the reception of message packets of the power plant monitoring system.

Objective. Experimental study of the method of rejection of narrowband interference using a square-law filter in systems for wireless monitoring on ultra-wideband signals using an energy receiver.

Results. It is shown that the use of a square-law filter makes it possible to reduce the effect of narrow-band interference and reduce the ratio of the amplitude of the useful signal to the amplitude of the narrow-band interference from 2 times to 50-60 dB, depending on the type of interference. It is experimentally shown that in the presence of narrow-band interference from a wireless local area network Wi-Fi with an average frequency of 2.4 GHz when using quadratic filtering with an error probability of 10–4, the gain is more than 3 dB.

Practical significance. The proposed method for rejection of narrowband interference using a square-law filter for processing ultrawideband signals using a power receiver makes it possible to implement simple and effective devices for wireless monitoring systems (for example, automobile engines).

Hu Boxiong, Dong Ge, Smirnova E.N., Makarov S.B., Korotkov A.S. Experimental study of the efficiency of narrowband interference rejection using a square-law filter in wireless engine monitoring systems. Radiotekhnika. 2021. V. 85. № 12. P. 116−128. DOI: https://doi.org/10.18127/j00338486-202112-10 (In Russian)

1. Andrijanov A.V. Sistema peredachi informacii s ispol'zovaniem sigma-del'ta moduljatora i peredatchika pachki SShP-impul'sov. Datchiki i sistemy. 2019. № 3(234). S. 19-24. (In Russian).
2. Bondarenko D.L., Golubev A.V. Ispol'zovanie SShP signala dlja skrytoj peredachi dannyh na rasstojanie. Sb. materialov I Vseros. nauch.-praktich. konf. «Nauka v Rossii: perspektivnye issledovanija i razrabotki» (Novosibirsk, 31 oktjabrja – 30 2017 g.). Novosibirsk: Obshhestvo s ogranichennoj otvetstvennost'ju «Centr razvitija nauchnogo sotrudnichestva». 2017. S. 98-102 (In Russian).
3. Andrijanov A.V. Ocenka jeffektivnosti priema pachki SShP-impul'sov. Sb. trudov XXV Mezhdunar. nauch.-tehnich. konf., posvjashh. 160-letiju so dnja rozhdenija A.S. Popova «Radiolokacija, navigacija, svjaz'». V 6-ti tomah. Voronezh: Voronezhskij gosudarstvennyj universitet. 2019. S. 185-190 (In Russian).
4. Mironov P.A., Nazarjan D.F., Kuralenja O.A., Ploc S.A. SShP-tehnologii v sistemah radiodostupa. Sovremennye problemy radiojelektroniki i telekommunikacij. 2018. № 1. S. 77 (In Russian).
5. Arias-De-Reyna E., D'Amico A.A., Mengali U. UWB Energy Detection Receivers with Partial Channel Knowledge. 2006 IEEE International Conference on Communications. 2006. V. 1−12. P. 4688−4693.
6. Nemati M.A., Mitra U., Scholtz R.A. Optimum Integration Time for UWB Transmitted Reference and Energy Detector Receivers. MILCOM 2006. 2006 IEEE Military Communications conference 10.1109/MILCOM.2006.302158. 2006. C. 1−7.
7. Sahin M.E., Guvenc I., Arslan H. Optimization of energy detector receivers for UWB systems. Vtc2005-Spring: 2005 IEEE 61st Vehicular Technology Conference Proceedings. 2005. V. 1−5. C. 1386−1390.
8. Rabbachin A., Quek T.Q.S., Pinto P.C., Oppermann I., Win M.Z. Non-Coherent UWB Communication in the Presence of Multiple Narrowband Interferers. IEEE Transactions on Wireless Communications. 2010. V. 9. № 11. P. 3365−3379.
9. Kosichkina T.P., Speranskij V.S. Analiz metodov podavlenija uzkopolosnyh pomeh pri prieme SShP-signalov. Jelektrosvjaz'. 2010. № 3. S. 17-20. (In Russian).
10. Frolov A.A. Vlijanie uzkopolosnyh i shirokopolosnyh pomeh na mnogochastotnuju impul'snuju SShP-sistemu radiodostupa.  Jelektrosvjaz'. 2014. № 7. S. 32-35. (In Russian).
11. Xu Z.M., Nie H., Chen Z.Z., Khani H., Yu L. Nonlinear Blind Narrowband Interference Mitigation for Energy Detection Based UWB Receivers. IEEE Communications Letters. 2012. V. 16. № 10. P. 1596−1599.
12. Korotkov A.S. Ustrojstva priema i obrabotki signalov: mikrojelektronnye vysokochastotnye ustrojstva radiopriemnikov sistem svjazi: Ucheb. posobie. SPb: Izd-vo Politehnicheskogo un-ta. 2010. 222 s. (In Russian).