Multi-Carrier Spread-Spectrum & Related Topics
Third International Workshop, September 26-28, 2001, Oberpfafenhofen, Germany
Erschienen am 9. März 2013
XIV, 376 Seiten
978-1-4757-3569-7 (ISBN)
Beschreibung
Stefan Kaiser Khaled Fazel Radio System Design German Aerospace Center (DLR) Marconi Communications lnstitute of Communications and Navigation D-71522 Backnang, Germany D-82234 Wessling, Germany We are currently observing that frequency spectrum is a limited and valuable resource for wireless mobile communications. A good example can be observed among European network operators for the prices to pay for frequency bands for UMTS/IMT2000. Keeping this in mind, the fIrst goal when designing future wireless communication systems has to be the increase in spectral effIciency by allowing higher flexibility for the system design and deployment. The development in digital communications in the past years has enabled effIcient modulation and coding techniques for robust and spectral effIcient data, speech, audio and video transmission. Here, we should mention two interesting and successful techniques. These are the multi-carrier modulation (e. g. OFDM) and the spread spectrum technique (e. g. DS-CDMA). During the last decade of this millennium the technique of multi-carrier transmission for wireless broadband multimedia applications has received wide interest. Its fIrst great success was in 1990 as it was selected for the European Digital Audio Broadcasting (DAB) standard. Its further prominent success was in 1995 and 1998 as it was selected as modulation scheme for the European Digital Video Broadcasting (DVB-T) standard and in three broadband wireless indoor standards, namely European ETSI-HIPERLAN/2, American IEEE-802. 11a and Japanese MMAC, respectively.
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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.
Inhalt
I General Issues.- A Review of Multicarrier CDMA*.- Time Division Duplex-CDMA*.- Timing Synchronization for the Uplink of an OFDMA System*.- Does OFDM Really Prefer Frequency Selective Fading Channels?.- II Applications.- An Adaptive Orthogonal Multicarrier Multiuser CDMA Technique for a Broadband Mobile Communication System.- Performance of Low Complex Antenna Diversity Techniques for Mobile OFDM Systems.- Common Architectures for TD-CDMA and OFDM Based Mobile Radio Systems Without the Necessity of a Cyclic Prefix.- Multi-Carrier CDMA for Air Traffic Control Air/Ground Communication.- Development and Implementation of an Advanced Airport Data Link Based on Multi-Carrier Communications.- III Coding and Modulation.- Potential and Benefits of the Spatial Dimension in Case of MC-CDMA*.- Variable Spreading Factor Orthogonal Frequency and Code Division Multiplexing (VSF-OFCDM).- Spreading Sequences Selection for Uplink and Downlink MC-CDMA Systems.- Serial Code Concatenation with Complex Valued Walsh-Hadamard Codes Applied to OFDM-CDMA.- A Study on Down-link Capacity of FD-MC/CDMA for Channels with Frequency Selective Fading.- On the Use of DMT and FMT for MC-CDMA Systems.- A Delayed-Multiplexing Multi-Carrier CDMA System.- IV Detection, Multiplexing, Interference Cancellation.- Comparison of MC-CDMA and COFDM/TDMA Techniques Taking into Account the System Load for Wireless Indoor Communications.- Decorrelation MUD for MC-CDMA in an Uplink Transmission Mode.- A Downlink SS-OFDM-F/TA Packet Data System Employing Multi-User Diversity.- Joint Detection in Multi-Antenna and Multi-User OFDM Systems.- Rate-Adaptive Coded Multiuser OFDM for Downlink Wireless Systems.- Adaptive Subspace Multiuser Detection for Multicarrier DS-CDMA.- Optimization of Capacity Assignement in MC-CDMA Transmission Systems.- Optimum Coefficient Matrix of Multi-Dimensional Lattice Filter for OFDM Transmission.- Capacity Enhancement of DS-CDMA Downlink Through Multicarrier with Frequency Overlapping.- Combating Near Far Effects of Linear MMSE Multiuser Detection in Coded OFDM-CDMA.- Downlink Performance of Randomized OFDM Access.- Implementation of a SIC Based MC-CDMA Base Station Receiver.- Investigation on Using Channel Information of MC/CDMA for Pre-Rake Diversity Combining in TDD/CDMA System.- Multicarrier CDMA System with Parallel Interference Cancellation in Fading Channel.- V Synchronization and Channnel Estimation.- Iterative Blind Channel Estimation for OFDM Receivers*.- Non-Data Aided EM-Based Channel Estimation for OFDM Systems with Time-Varying Fading Channels.- Joint Directions of Arrival and Delay Channel Characteristics Estimation Using Circular Array Antenna for MC/CDMA.- Channel Estimation for Time-Hopping Impulse Radio.- Comparison of Channel Estimation Techniques for a Single Carrier System Using Frequency Domain Equalization and HIPERLAN/2 Like OFDM Systems.- VI Realization and Implementation.- Array Antenna Assisted Doppler Spread Compensator for OFDM.- Filter Design Methodology Controlling the Impact on Bit Error Rate Performances in WLAN-OFDM Transceivers.- Proposal of ISM Band High Data Rate Wireless LAN System Usina SS-OFDM Technique.- Joint Technique of PTS and Adaptive Clipping Level Control with Filtering for OFDM Peak Power Reduction.- Radio Link Availability Enhancement by Applying Spread-Spectrum Technique.
