Multi-Carrier Spread-Spectrum Proceedings from the 5th International Workshop, Oberpfaffenhofen, Germany, September 14-16, 2005

The benefits and success of multi-carrier (MC) modulation on one side and the flexibility offered by the spread spectrum (SS) technique on the other side have motivated many researchers to investigate the combination of both techniques since 1993. This combination known as multi-carrier spread spectrum (MC-SS) benefits from the advantages of both systems and offers high flexibility, high spectral efficiency, simple detection strategies, narrow-band interference rejection capability, etc. The basic principle of this combination is straightforward: The spreading is performed as direct sequence spread spectrum (DS-SS) but instead of transmitting the chips over a single carrier, several sub-carriers are employed. The MC modulation and demodulation can easily be realized in the digital domain by performing IFFT and FFT operations. The separation of the users' signals can be performed in the code domain. MC-SS systems can perform the spreading in frequency direction, which allows for simple signal detection strategies. Since 1993, MC-SS has been deeply studied and new alternative solutions have been proposed. Meanwhile, deep system analysis and comparison with DS-CDMA have been performed that show the superiority of MC-CDMA. The aim of Multi-Carrier Spread-Spectrum is to edit the ensemble of the newest contributions and research results in this new field that have been presented during the 5th International Workshop on Multi-Carrier Spread-Spectrum (MC-SS 2005), held in Oberpfaffenhofen, Germany. TOC:From the contentsGeneral Issues.- Cellular Aspects.- Spreading and Detection.- Channel Estimation.- MIMO and Adaptivity.- System Performance and Implementation Aspects

I GENERAL ISSUES Experiments on Space Diversity Effect in MIMO Channel Transmission with Maximum Data Rate of 1 Gbps in Downlink OFDM Radio Access; K. Higuchi, H. Taoka, N. Maeda, M. Sawahashi (NTT DoCoMo, Japan) Reduced-complexity Maximum-likelihood Detection in Multiple-antenna-aided Multicarrier Systems; J. Akthman, L. Hanzo (University of Southampton, UK) On Coding for OFDM and the Broadcast Channel; M. Bossert (University of Ulm, Germany) Adaptivity in MC-CDMA Systems; I. Cosovic (German Aerospace Center (DLR), Germany), S. Kaiser (DoCoMo Euro-Labs, Germany) Parameter Estimation for Interference Cancellation in Power-controlled MC-CDMA Downlink Transmissions; M. Morelli, L. Sanguinetti, U. Mengali (University of Pisa, Italy) Performance Evaluation and Parameter Optimization of MC-CDMA; M. Guenach, H. Steendam (Ghent University, Belgium) A Novel Algorithm of Inter-subchannel Interference Cancellation for OFDM Systems; M.-X. Chang (National Cheng-Kung University, Taiwan) Comparative Multicarrier System Performance in Jamming and Fading; D. W. Matolak, W. Xiong, I. Sen (Ohio University, USA) CDMA in the Context of OFDM and SC/FDE - A Comparative Study; H. Witschnig (Philips, Austria), M. Huemer (University of Erlangen, Germany), R. Stuhlberger, A. Springer (University of Linz, Austria) II CELLULAR ASPECTS Impact of the Intercell Interference in DL MC-CDMA Systems; X. G. Doukopoulos, R. Legouable (France Telecom R&D, France) Quantifying the Impact of the MC-CDMA Physical Layer Algorithms on the Downlink Capacity in a Multi-cellular Environment; A.-M. Mourad, A. Guéguen (Mitsubishi Electric ITE-TCL, France), R. Pyndiah (Ecole Nationale Supérieure desTélécommunications de Bretagne, France) Radio Resource Management for MC-CDMA over Correlated Rayleigh Fading Channels; S. Plass, A. Dammann (German Aerospace Center (DLR), Germany) Throughput of Heterogeneous Multi-Cell Multi-User MIMO-OFDM Systems; B. Mielczarek, W. A. Krzymien (TRLabs/University of Alberta, Canada) Real-link Performance of a SS-MC-MA High Frequency Radio Modem; H. Santana-Sosa (Universidad des Las Palmas de Gran Canaria, Spain), I. Raos, S. Zazo-Bello (Universidad Politecnica de Madrid, Spain), I. A. Pérez-Álvarez, J. López-Pérez (Universida des Las Palmas de Gran Canaria, Spain) III SPREADING AND DETECTION Analysis of Iterative Successive Interference Cancellation in SC-CDMA Systems; P. Weitkemper, V. Kuehn, K.-D. Kammeyer (University of Bremen, Germany) Bandwidth and Power Efficient Digital Transmission using Sets of Orthogonal Spreading Codes; W. G. Teich, P. Kaim, J. Lindner (University of Ulm, Germany) Simplified Realization of Pseudo-Orthogonal Carrier Interferometry OFDM by FFT Algorithm; K. Anwar, M. Saito, T. Hara, M. Okada, H. Yamamoto (Nara Institute of Science and Technology, Japan) Exploiting Rotated Spreading Features for CDM-OFDMA; R. Raulefs, A. Dammann, S. Ayaz (German Aerospace Center (DLR), Germany) Detection of Pre-coded OFDM by Recovering Symbols on Degraded Carriers; S. Tamura, M. Fujii, M. Itami, K. Itoh (Tokyo University of Science, Japan) Semi-blind Multiuser Detection in Zero-padded OFDM-CDMA Systems; R. Boloix-Tortosa, F. J. Payan-Somet, J. J. Murillo-Fuentes (Universidad de Sevilla, Spain) A Study on Adaptive Successive Detection using M Algorithm based on ML Criterion for Down-link MC-CDMA Systems; Y. Morishige, M. Fujii, M. Itami, K.

Stefan Kaiser was the first researcher to address the institutional and legal aspects of the future air navigation systems in a pioneering thesis presented to the Institute of Air and Space Law, McGill University.