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Facta universitatis - series: Electronics and Energetics
2010, vol. 23, iss. 3, pp. 319-332
article language: English
document type: unclassified
published on: 28/12/2010
doi: 10.2298/FUEE1003319T
Analysis and optimization of direct sequence spread spectrum scheme for an unmanned aerial vehicle PPM control signal
aRT-RK d.o.o., R&D Center for Computer Based Systems, Novi Sad
bIMTEL Institute, Belgrade

e-mail: branislav.todorovic@rt-rk.com, cheggy@insimtel.com

Project

Projekat Ministarstva nauke Republike Srbije, br. ET-11037

Abstract

Binary pulse-position modulated (PPM) control signal is widely used in remotely controlled unmanned aerial vehicles. It consists of data frames, which contain a synchronizing pulse followed by a number of shorter pulses equal to the number of channels N. In this paper we present analysis and optimization of direct sequence spread spectrum (DS-SS) scheme for PPM control signal protection. That scheme uses (N+1) pseudonoise (PN) sequences: one of them (PN0) is assigned to the synchronizing pulse while the each of the remaining N sequences (PN1,PN2, . . . ,PNN) corresponds to the appropriate channel. At the receiving side, the set of (N+1) passive correlators is used to detect respective PN sequences and to reconstruct data. Onelevel and two-level detection are considered. Threshold settings optimization is based on the Neyman-Pearson procedure. As an additional performance measure we introduce probability of corruptive false alarms. Numerical results are presented.

Keywords

spread spectrum communication; unmanned aerial vehicle; pulse position modulation

References

*** (2007) The Model Electronics Company. Tech. Rep. MTN004, issue 1.1
Elmirghani, J.M.H., Cryan, R.A., Clayton, F.M. (1995) Spectral analysis of timing jitter effects on the cyclostationary PPM format. Signal Processing, 43(3): 269-277
Jovanović, V.M., Sousa, E.S. (1995) Analysis of non-coherent correlation in DS/BPSK spread spectrum acquisition. IEEE Trans. Communications, vol. 43, br. 2, 3, 4, str. 565-573
Orlić, V.D., Todorović, B.M., Dukić, M.L. (2010) Analiza korelacionih osobina pseudoslučajnih sekvenci dužine 255 za zaštitu upravljačkog signala bespilotne letelice. Vojnotehnički glasnik, vol. 58, br. 2, str. 26-42
Polydoros, A., Weber, C.L. (1984) A unified approach to serial search spread spectrum code acquisition: Parts I and II. IEEE Transactions on Communications, vol. COM- 32, br. 5, str. 542-560, May
Schwartz, M., Bennett, W.R., Stein, S. (1966) Communication systems and techniques. New York: McGraw-Hill
Simon, M.K., Omura, J.K., Scholty, R.A., Levitt, B.K. (1994) Spread spectrum communications handbook. McGraw-Hill
Todorović, B.M., Orlić, V.D. (2009) An application of direct sequence spread spectrum to unmanned aerial vehicle PPM control signal protection. in: Proc. of IEEE 9th Int. Conf. Telecomm. in Modern Satellite, Cable and Broadcasting Services (IEEE TELSIKS), Nis, Serbia, Oct. 2009
Todorović, B.M., Orlić, V.D. (2009) Direct sequence spread spectrum scheme for an unmanned aerial vehicle PPM control signal protection. IEEE Communications Letters, vol. 13, br. 10, Oct str. 727-729
Valavanis, K.P., ur. (2008) Advances in unmanned aerial vehicles. Springer