V.V. Pechurin – Ph.D. (Eng.), Scientist,

Cherepovets Higher Military Engineering Order of Zhukov School of Radio Electronics

(Cherepovets, Vologda Region, Russia)

E-mail: cvviur6@mil.ru

I.V. Chebotar − Dr.Sc. (Eng.), 

Cherepovets Higher Military Engineering Order of Zhukov School of Radio Electronics

(Cherepovets, Vologda Region, Russia)

E-mail:cvviur6@mil.ru

I.G. Pivkin − Scientist,

Cherepovets Higher Military Engineering Order of Zhukov School of Radio Electronics 

(Cherepovets, Vologda Region, Russia) E-mail: cvviur6@mil.ru

Currently, radio engineering systems for positioning of radio sources based on the time difference of arrival technique are becoming more widely used. The positioning inaccuracy in such systems depends on their geometric parameters. An incorrect setting of these system parameters will negate its inherent advantages, and, conversely, correctly set geometric parameters of the time difference of arrival system will ensure a minimum positioning inaccuracy of radio sources.

The study shows that in the time difference of arrival system with three receiving points, the minimum positioning inaccuracy of radio sources is provided at the same viewing angles and the optimal angle between the bases of the system, depending on the distance to the source and the size of the bases. To achieve the minimum possible inaccuracy, you must increase the size of the system's bases. Increasing the size of the bases leads to a decrease of the positioning inaccuracy, provided that the radio source is located outside the geometry of the time difference of arrival system. In the time difference of arrival system with constant bases, it is necessary to increase the angle between them to the optimal value when increasing the distance to the intended radio source, and, conversely, when reducing the distance, reduce the angle between the bases of the system to the optimal value. The optimal angle at which the minimum positioning inaccuracy is reached depends on the distance to the radio source and, accordingly, the size of the system bases.

In this regard, the article investigates and computes the minimum positioning inaccuracy of radio sources in the time difference of arrival systems. As a result, the values of the minimum positioning inaccuracy of radio sources in the time difference of arrival systems with three receiving points are obtained. The article gives a comparison of the two variants of time difference of arrival systems with different geometric parameters.

The results of the study will allow us to reduce the positioning inaccuracy of radio sources in the time difference of arrival systems by correctly specifying their geometric parameters.

1. Sravnenie metodov opredelenija geograficheskogo mestopolozhenija istochnika signala, osnovannyh na raznice vo vremeni prihoda i ugle prihoda signalov. Otchet MSJe-R SM.2211-1 (06/2014). Upravlenie ispol'zovaniem spektra. 2014. 32 s. (In Russian).
2. Jarlykov M.S. Statisticheskaja teorija radionavigacii. M.: Radio i svjaz'. 1985. 344 s. (In Russian).
3. Kondrat'ev V.S., Kotov A.F., Markov L.N. Mnogopozicionnye radiotehnicheskie sistemy. Pod red. prof. V.V. Cvetnova. M.: Radio i svjaz'. 1986. 264 s. (In Russian).
4. Volkov R.V., Dvornikov S.V., Sajapin V.N., Simonov A.N. Osnovy postroenija i funkcionirovanija raznostno-dal'nomernyh sistem koordinatometrii istochnikov radioizluchenij. Pod red. R.V. Volkova: Ucheb. posobie. SPb: VAS. 2013. 116 s. (In Russian).