Multi-Carrier Spread Spectrum & Related Topics by Hikmet Sari, Frederik Vanhaverbeke, Marc Moeneclaey (auth.),
By Hikmet Sari, Frederik Vanhaverbeke, Marc Moeneclaey (auth.), Khaled Fazel, Stefan Kaiser (eds.)
Khaled Fazel Stefan Kaiser electronic Microwave structures German Aerospace heart (DLR) Bosch Telecom GmbH Institute for Communications expertise D-71522 Backnang, Germany D-82234 Wessling, Germany during this final decade of this millennium the means of multi-carrier transmission for instant broadband multimedia functions has been receiving broad pursuits. Its first nice luck was once in 1990 because it was once chosen within the eu electronic Audio Broadcasting (DAB) typical. Its additional well-known successes have been in 1995 and 1998 because it was once chosen as modulation scheme within the eu electronic Video Broadcasting (DVB-T) and in 3 broadband instant indoor criteria, particularly ETSI-Hiperlan-II, American IEEE-802. eleven and jap MMAC, respectively. the advantages and luck of multi-carrier (MC) modulation in a single facet and the pliability provided through unfold spectrum (SS) method in different hand inspired many researchers to enquire the combo of either options, often called multi-carrier spread-spectrum (MC-SS). this mixture advantages from the most benefits of either platforms and provides excessive flexibility, excessive spectral potency, uncomplicated detection recommendations, slender band interference rejection strength, and so on. . the fundamental precept of this mix is simple: The spreading is played as direct SS (DS-SS) yet rather than transmitting the chips over a unmarried series service, a number of sub-carriers should be hired. As depicted in determine 1, after spreading with assigned consumer particular code of processing achieve G the frequency mapping and multi-carrier modulation is utilized. within the receiver facet after multi-carrier demodulation and frequency de-mapping, the corresponding detection set of rules could be performed.
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Pahlavan and A. H. Levesque, Wireless Information Networks. New York: John Wiley & Sons, 1995. W. C. Jakes, Microwave Mobile Communications. New York: John Wiley & Sons, 1974. Section II APPLICATIONS OF MULTI-CARRIER SPREADSPECTRUM & RELATED TOPICS Performance of a Flexible Form of MC-CDMA in a Cellular System Heidi Steendam and Marc Moeneclaey Department o/Telecommunications and In/ormation Processing, University o/Ghent, B-9ooo GENT, BELGIUM Key words: MC-CDMA, flexibility Abstract: In this contribution, we investigate a variant of the traditional MC-CDMA system in the case of downlink communication.
P,/ (1- P'Y-] ------------------------------(9) j=l+1 } where t denotes the error correction capability of the code. 2. DS-CDMA-SFH The general derivation for this system is similar, except that the system uses Binary Frequency Shift Keying (BFSK) modulation followed by non - coherent demodulation, because, of the nature of slow frequency hopping as discussed earlier. The considered system is asynchronous as this is the more realistic case. Even when synchronism can be achieved between individual user clocks, radio signals will not arrive synchronously to each user due to propagation delays.
Giannakis, Z. Wang, A. Scaglione, and S. Barbarossa, "AMOUR - generalized multicarrier transceivers for blind CDMA irrespective of multipath," IEEE Trans. , (submitted December, 1998);, see also, Proc. of GLOBECOM, Rio de Janeiro, Brazil, Dec. 5-9, 1999 (to appear). [6] S. Hara and R. Prasad, "Overview of multicarrier CDMA," IEEE Comm. , pp. 126-133, Dec. 1997. [7] S. Kaiser and K. Fazel, "A spread spectrum multi-carrier multiple access system for mobile communications," in First International Workshop in Multicarrier Spread-Spectrum, Oberpfaffenhofen, Germany, Apr.