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. cover.pdf......Page 1 front-matter.pdf......Page 2 TABLE OF CONTENTS......Page 5 EDITORIAL INTRODUCTION......Page 11 ACKNOWLEDGEMENT......Page 16 1 Experiments on Space Diversity Effect in MIMO Channel Transmission with Maximum Data Rate of 1 Gbps in Downlink OFDM Radio Access.pdf......Page 17 2 Reduced-complexity Maximum-Likelihood Detection in Multiple-antenna-aided Multicarrier Systems.pdf......Page 35 3 On Coding for OFDM and the Broadcast Channel.pdf......Page 43 4 Adaptivity in MC-CDMA Systems.pdf......Page 59 5 Parameter Estimation for Interference Cancellation in Power-controlled MC-CDMA Downlink Transmissions.pdf......Page 69 6 Performance Evaluation and Parameter Optimization of MC-CDMA.pdf......Page 81 7 A Novel Algorithm of Inter-subchannel Interference Cancellation for OFDM Systems.pdf......Page 89 8 Comparative Multicarrier System Performance in Jamming and Fading.pdf......Page 97 9 CDMA in the Context of OFDM and SC_FDE – A Comparative Study.pdf......Page 105 10 Impact of the Intercell Interference in DL MC-CDMA Systems.pdf......Page 113 11 Quantifying the Impact of the MC-CDMA Physical Layer Algorithms on the Downlink Capacity in a Multi-cellular Environment......Page 121 12 Radio Resource Management for MC-CDMA over Correlated Rayleigh Fading Channels......Page 131 13 Throughput of Heterogeneous Multi-Cell Multi-User MIMO-OFDM Systems......Page 139 14 Real-link Performance of a SS-MC-MA High Frequency Radio Modem......Page 149 15 Analysis of Iterative Successive Interference Cancellation in SC-CDMA Systems......Page 156 16 Bandwidth and Power Efficient Digital Transmission using Sets of Orthogonal Spreading Codes......Page 165 17 Simplified Realization of Pseudo-Orthogonal Carrier Interferometry OFDM by FFT Algorithm......Page 174 18 Exploiting Rotated Spreading Features for CDM-OFDMA......Page 182 19 Detection of Pre-coded OFDM by Recovering Symbols on Degraded Carriers......Page 190 20 Semi-blind Multiuser Detection in Zero-padded OFDM-CDMA Systems......Page 198 21 A Study on Adaptive Successive Detection using M Algorithm based on ML Criterion for Down-link MC-CDMA Systems......Page 206 22 Channel Estimation in the Presence of Timing Offsets for MC-CDMA Uplink Transmissions with Combined Equalization......Page 215 23 Iterative Channel Estimation for MIMO MC-CDMA......Page 225 24 Performance Investigation of Improved Channel Estimation Exploiting Long Term Channel Properties......Page 235 25 Pilot Symbol-Aided Channel Estimation for MC-CDMA Systems......Page 243 26 Superimposed Pilot-based Channel Estimation for MIMO OFDM Code Division Multiplexing Uplink Systems......Page 251 27 Pilot Time-Frequency Location Adjustment in OFDM Systems Based on the Channel Variability Parameters......Page 261 28 Reduced Feedback Closed-Loop Spatial Multiplexing for B3G Systems......Page 269 29 A MIMO-OFDM Transmission Scheme Employing Subcarrier Phase Hopping......Page 277 30 Multicarrier SDMA System with Reduced Intra-user Cross-correlations......Page 285 31 Effect of Adaptive Modulation and Error Correction on Multi-Band OFDM-MIMO System......Page 293 32 Near Optimal Performance for High Data Rate MIMO MC-CDMA Scheme......Page 305 33 STBC-TCM for MC-CDMA Systems with SOVA-based Decoding and Soft-interference Cancellation......Page 313 34 OFDMA with Subcarrier Sharing......Page 321 35 New Loading Algorithms for Adaptive SS-MC-MA Systems over Power Line Channels: Comparisons with DMT......Page 329 36 An Investigation of Optimal Solution for Multiuser Sub-carrier Allocation in OFDMA Systems......Page 339 37 Optimal Solution to Adaptive Subcarrier-and-bit Allocation in Multiclass Multiuser OFDM System......Page 347 38 Dynamic and Scalable Bandwidth Allocation for Beyond 3G CDMA Systems......Page 355 39 Effective SINR Mapping for an MC-CDMA System......Page 363 40 Combination of H-ARQ and Iterative Multi-user Detection for OFDMA CDM......Page 373 41 A Comparative Analysis of CDM-OFDMA and MC-CDMA Systems......Page 385 42 Multi-User Transmit Power Control for Multi-carrier Modulation Systems in Quasi-synchronous Uplink Channel......Page 393 43 On the Compensation of IQ Imbalance in an SC/FDE System......Page 401 44 On Implementation Aspects of Uplink MC-CDMA Multi-user Detection......Page 409 45 Analytical Performance of a Frequency Offset Multi-user Multi-array System......Page 417 46 Effects of Subcarrier Interleaving on LDPC Coded MC-CDMA Systems......Page 425 47 One-shot and Iterative Symbol Predistortion Techniques for PAPR Reduction in OFDM Systems......Page 433 48 Iterative Correction and Decoding of OFDM Signals Affected by Clipping......Page 443 49 PAPR Reduction of MC-CDMA Signals by Selected Mapping with Interleavers......Page 453 50 Iterative Nonlinear Channel Compensation in MC-CDMA Systems......Page 461 51 Sidelobe Suppression in OFDM Systems......Page 473 52 Blind Phase Noise Estimation in OFDM Systems by Sequential Monte Carlo Method......Page 483 53 Sensitivity Comparison of Multi-carrier and Spread Spectrum Systems to Phase Noise......Page 491 Khaled Fazel Stefan Kaiser Radio System Design DoCoMo Euro-Labs Marconi Communications Landsberger Strasse 312 D-71522 Backnang, Germany D-80687 Munich, Germany The field of multi-carrier and spread spectrum communications has became an important research topic with increasing number of research activities [1]. Especially in the last two years, beside deep system analysis of various multiple access schemes, new standardization activities in the framework of beyond 3G (B3G) concepts have been initiated. Multi-carrier transmission is considered to be a potential candidate to fulfil the requirements of the next generation system. The two important requirements of B3G/4G can be summarized as: i) much higher data rate for cellular mobile radio and ii) a unique physical layer specification for indoor/hot spot and outdoor/cellular applications, including fixed wireless access (FWA) schemes. The activities within the 3GPP and WiMAX fora are examples of such trends (see Fig. 1). IEEE 802 ETSI WAN UMTS, EDGE 3GPP (GSM) HiperMAN & IEEE 802. 16 WiMAX MAN HiperAccess WirelessMAN HiperLAN/2 IEEE 802. 11 LAN WiFi RLAN WirelessLAN IEEE 802. 15 PAN Bluetooth BRAN Figure 1 Beyond 3G: Worldwide Standardization Activities xii Editorial Introduction The WiMAX (Worldwide Interoperability for Microwave Access [2]) vision is to provide broadband wireless access with its primary goal to promote IEEE 802. 16a-e and ETSI-BRAN standards through interoperability testing and certification. In the first step the broadband access to the so-called last mile applications with fixed positioned terminals is envisaged