Increasing Range of Ultrawideband Direct Chaotic Communications
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MICS CHAOS IN RADIOPHYSICS AND ELECTRONICS
Increasing Range of Ultrawideband Direct Chaotic Communications A. S. Dmitrieva, *, M. G. Popova, and A. I. Ryzhova aKotelnikov
Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, 125009 Russia *e-mail: [email protected] Received September 24, 2019; revised September 24, 2019; accepted October 20, 2019
Abstract—A problem of an increase in the range of direct chaotic ultrawideband transceivers is considered. Parameters that determine the range are theoretically estimated. Experimental transceivers with a capacity of up to 12 Mbit/s and a range of greater than 200 m are developed and fabricated. The corresponding software is developed and tested. Experimental characteristics of the devices prove the theoretical estimations. DOI: 10.1134/S1064226920080021
INTRODUCTION National spectral masks on unlicensed application of ultrawideband (UWB) signals in wireless communications were adopted in the early 2000s1, 2, 3. Thus, the main interests of researchers and engineers have been focused on the study of personal communications the range of which amounts to 30–40 m (short-range systems) [1–3]. However, several problems involve application of UWB communication systems at distances of no less than 100 m. In particular, recent interest in such problems has been driven by high-accuracy ranging and development of positioning systems4, 5. It is expedient to employ UWB communication systems in a few communication problems, in particular, development of a local information and communication structure for small settlements [4]. Several problems related to technical characteristics of transceivers, fabrication of such devices, and conditions for application emerge in the development of the above communication systems. In this work, we study such problems with respect to UWB direct chaotic communication systems [5–7]. 1 Federal
Communications Commission R&O no. FCC 02-48, February 14, 2002. 2 The State Commission for Radio Frequencies, Decision no. 0905-02, December 15, 2009. 3 Standardisation mandate forwarded to CEN/CENELEC/ETSI for harmonised standards covering ultra-wideband equipment. European Commission. TCAM Secretariat. Brussels, 19 April 2007. 4 Zebra UWB Tag Portfolio Spec Sheet // https://www.zebra.com/ content/dam/zebra_new_ia/en-us/solutions-verticals/product/ location_solutions/zebra-ultra-wideband/uwb-tag/spec-sheet/uwbtag-spec-sheet-en-us.pdf. 5 Decawave DWM1000 Module // https://www.decawave.com/ product/dwm1000-module/.
1. FACTORS THAT DETERMINE THE RANGE OF UWB DIRECT CHAOTIC TRANSCEIVERS Several factors that determine the working range of a communication line must be taken into account for transition from short-range (30–40 m) direct chaotic transceivers to devices with a range typical of local wireless communication systems with a range of 100– 200 m: (i) transmitter power, (ii) receiver sensitivity, (iii) directional pattern of antennas, (iv) base of chaotic radio pulses, and (v) presence of multibeam propagation (intersymbol interfe
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