Mise en place d'une couche physique pour les futurs systèmes de radiocommunications hauts débits UWB

L'UWB (Ultra Wide Band) consiste a transmettre des signaux entre 3. 1 et 10. 6 GHz avec une puissance limitee a -41. 3 dBm/MHz. Pour les communications hauts debits (100 a 500 Mbit/s) et courtes portees (1 a 10 m), les solutions de l'etat de l'art reposent sur des traitements numeriques complexes. Mitsubishi ITE propose une solution alternative multi-bandes (MB) impulsionnelle basee sur un recepteur non-coherent. La demodulation OOK est effectuee par une detection d'energie originale avec un seuillage adapte dynamiquement suivant les conditions de propagation. La parallelisation complete de ce systeme MB-OOK permet a la fois d'eviter les interferences inter-symboles et de recuperer la quasi totalite de l'energie disponible. En outre, l'approche impulsionnelle limite les evanouissements du signal sur canal multi-trajets. La comparaison des systemes MB-OOK et MB-OFDM demontre la pertinence de la solution proposee pour des applications tres hauts debits, courte portee et faible consommation.

[1]  B. Uguen,et al.  An impulse radio asynchronous transceiver for high data rates , 2004, 2004 International Workshop on Ultra Wideband Systems Joint with Conference on Ultra Wideband Systems and Technologies. Joint UWBST & IWUWBS 2004 (IEEE Cat. No.04EX812).

[2]  S. Paquelet,et al.  An energy adaptive demodulation for high data rates with impulse radio , 2004, Proceedings. 2004 IEEE Radio and Wireless Conference (IEEE Cat. No.04TH8746).

[3]  Vahid Tarokh,et al.  UWB indoor path loss model for residential and commercial buildings , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).

[4]  Moe Z. Win,et al.  The ultra-wide bandwidth indoor channel: from statistical model to simulations , 2002, IEEE J. Sel. Areas Commun..

[5]  H.G. Schantz,et al.  The diamond dipole: a Gaussian impulse antenna , 2001, IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229).

[6]  W. Hirt,et al.  ML receiver for pulsed UWB signals and partial channel state information , 2005, 2005 IEEE International Conference on Ultra-Wideband.

[7]  Raymond Knopp,et al.  Challenges in UWB signaling for adhoc networking , 2003, Multiantenna Channels: Capacity, Coding and Signal Processing.

[8]  J. Foerster,et al.  Channel modeling sub-committee report final , 2002 .

[9]  Theodore S. Rappaport,et al.  Wireless communications - principles and practice , 1996 .

[10]  G. Maibaum.  H. F. Harmuth, Transmission of Information by Orthogonal Functions. XI + 322 S. m. 110 Fig. Berlin/Heidelberg/New York 1969. Springer‐Verlag. Preis geb. DM 40,— , 1971 .

[11]  Louis-Marie Aubert.  RF front-end considerations for SDR ultra-wideband communications systems , 2004 .

[12]  Ingo Wolff,et al.  FDTD simulations of indoor propagation , 1994, Proceedings of IEEE Vehicular Technology Conference (VTC).

[13]  P. J. Gibson.  The Vivaldi Aerial , 1979, 1979 9th European Microwave Conference.

[14]  Stanislav Licul,et al.  ULTRA-WIDEBAND ANTENNA CHARACTERIZATION AND MEASUREMENTS , 2004 .

[15]  H. Arslan,et al.  Inter-symbol interference in high data rate UWB communications using energy detector receivers , 2005, 2005 IEEE International Conference on Ultra-Wideband.

[16]  P. Humblet,et al.  On the bit error rate of lightwave systems with optical amplifiers , 1991 .

[17]  J. Kunisch,et al.  Measurement results and modeling aspects for the UWB radio channel , 2002, 2002 IEEE Conference on Ultra Wideband Systems and Technologies (IEEE Cat. No.02EX580).

[18]  Robert A. Scholtz,et al.  Multiple access with time-hopping impulse modulation , 1993, Proceedings of MILCOM '93 - IEEE Military Communications Conference.

[19]  Sanjay Raman,et al.  A Comprehensive Investigation of New Planar Wideband Antennas , 2002 .

[20]  Ian Oppermann,et al.  UWB theory and applications , 2004 .

[21]  Stephen E. Saddow,et al.  Time Coherent Ultra-Wideband Pulse Generation Using Photoconductive Switching , 1995, IEEE/LEOS 1995 Digest of the LEOS Summer Topical Meetings. Flat Panel Display Technology.

[22]  Moe Z. Win,et al.  Impulse radio: how it works , 1998, IEEE Communications Letters.

[23]  Ralf R. Müller,et al.  MIMO channel modeling and the principle of maximum entropy , 2005, IEEE Transactions on Information Theory.

[24]  Bernard Uguen,et al.  UWB Non coherent hign data rates tranceiver architecture and implementation , 2005 .

[25]  C. Harrison,et al.  Transients in wide-angle conical antennas , 1965 .

[26]  Florence Sagnard,et al.  Characterization of building materials for propagation modelling: frequency and time responses , 2005 .

[27]  Peter M. Dollard.  On the time-bandwidth concentration of signal functions forming given geometric vector configurations , 1964, IEEE Trans. Inf. Theory.

[28]  H.T. Friis,et al.  A Note on a Simple Transmission Formula , 1946, Proceedings of the IRE.

[29]  A.A.M. Saleh,et al.  A Statistical Model for Indoor Multipath Propagation , 1987, IEEE J. Sel. Areas Commun..

[30]  Jess Marcum,et al.  A statistical theory of target detection by pulsed radar , 1948, IRE Trans. Inf. Theory.

[31]  Debra McKeown,et al.  Ultra-wideband Radio Technology , 2004 .

[32]  J.L. Garcia,et al.  New channel impulse response model for UWB indoor system simulations , 2003, The 57th IEEE Semiannual Vehicular Technology Conference, 2003. VTC 2003-Spring..