Ultrawideband transmission in physical channels: a broadband interference view

• Autorzy: Lasota H. , Kochańska I. , Mazurek R.
• Języki publikacji: EN

Abstrakty

EN

The superposition of multipath components (MPC) of an emitted wave, formed by reflections from limiting surfaces and obstacles in the propagation area, strongly affects communication signals. In the case of modern wideband systems, the effect should be seen as a broadband counterpart of classical interference which is the cause of fading in narrowband systems. This paper shows that in wideband communications, the time- and frequency-domain approach of the linear time-invariant (LTI) systems theory does not fully reveal the significance of channelinduced distortions. A survey of MPC interference phenomena is presented, with time-evolving impulse responses and space-dependent notransfer functions. Linear prediction technique based on the autoregressive model is successfully applied as a complementary tool for speech signal distortion analysis in public address systems.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2014
• Tom: Vol. 17
• Strony: 129--136
• Opis fizyczny: Bibliogr. 13 poz., rys.

Twórcy

autor

Lasota H.

• Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdansk, Poland

autor

Kochańska I.

• Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdansk, Poland

autor

Mazurek R.

• Gdansk University of Technology, ul. Narutowicza 11/12, 80-233 Gdansk, Poland

Bibliografia

• [1] I. Kochanska, H. Lasota, Investigation of underwater channel time-variabiliy influence on the throughput of OFDM data transmission system, Proceedings of Meetings on Acoustics, POMA, 17, Acoustical Society of America, 2012.
• [2] I. Kochanska, Investigation of underwater acoustic channel transmission properties for application in digital communications (in Polish), Ph.D. thesis, Gdansk University of Technology, 2012.
• [3] T. P. Zielinski, Digital signal processing: from theory to applications (in Polish), WKiL, Warszawa 2007.
• [4] T. B. Barrett, History of UltraWideBand (UWB) radar communications: pioneers and innovators, Progress in Electromagnetics, PIERS, Cambridge 2000.
• [5] J. Ahmadi-Shokouh, R. Qio, Ultra-wideband (UWB) communications channel measurements – a tutorial review, Int. J. Ultra Wideband Communications and Systems, 1 (1), 11-31, 2009.
• [6] A. F. Molisch, Ultra-wide-band propagation channels, Proceedings of the IEEE, 97 (2), 353–371, February 2009.
• [7] Standard (IEC60849): Sound Systems for Emergency Purposes.
• [8] H. Lasota, R. Mazurek, Modeling and measurement of sound reinforcement system in auditory room (in Polish), Pomiary Automatyka Kontrola, 3 (2008), 148-152.
• [9] R. Mazurek, H. Lasota, Broadband interference in speech reinforcement systems, In: 1st International Conference on Information Technology, IEEE, 329-332, 2008.
• [10] H. Lasota, R. Mazurek, and M. Miler, Acoustic fields of broadband sources and their arrays (in Polish), Mat. XLIX Otw. Sem. Akust., Warszawa – Stare Jabłonki, 2002, 589-594.
• [11] H. Lasota, R. Mazurek, Broadband interference in multisource reinforcement systems (in Polish), Zeszyty naukowe Wydziału Elektroniki, Telekomunikacji i Informatyki Politechniki Gdanskiej 16 (2008), 495-500.
• [12] R. Mazurek, Space-time distribution of acoustic field of sets of broadband sources, and its influence on distortion of speech signals (in Polish), Ph.D. thesis, Gdansk University of Technology, 2014.
• [13] S. R. Quackenbush, T. P. Barnwell III, and M. A. Clements, Objective measures of speech quality (Prentice-Hall Signal processing series) Prentice Hall 1988.