Multi-Carrier and Spread Spectrum Systems

Frequency spectrum is a limited and valuable resource for wireless communications. A good example can be observed among network operators in Europe for the prices to pay for UMTS-frequency bands. Therefore, the first goal when designing future wireless communication systems (e.g. 4G - fourth generation) has to be the increase in spectral efficiency. 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. These are the multi-carrier modulation (e.g. OFDM) and the spread spectrum technique (e.g. DS-CDMA), where OFDM was chosen for broadcast applications (DVB, DAB) as well as for broadband wireless indoor standards (ETSI HIPERLAN-II, IEEE-802.11) and the DS-CDMA was selected in mobile communications (IS-95, third generation mobile radio systems world wide, UMTS/IMT 2000). Since 1993 various combinations of multi-carrier (MC) modulation and the spread spectrum (SS) technique have been introduced and the field of MC-SS communications has become an independent and important research topic with increasing activities. New application fields have been proposed such as high rate cellular mobile, high rate wireless indoor and LMDS. It has been shown that MC-SS offers the high spectral efficiency, robustness and flexibility that is required for the next generation systems. Meanwhile, different alternative hybrid schemes such as OFDM/OFDMA, MC-TDMA, etc. have been deeply analysed and adopted in different international standards (ETSI-BRAN, IEEE-802 & MMAC). Multi-Carrier & Spread-Spectrum: Analysis of Hybrid Air Interfaces draws together all of the above mentioned hybrid schemes therefore providing a greatly needed resource for system engineers, telecommunication designers and researchers in order to enable them to develop, build and deploy several schemes based on MC-transmission for the next generation systems (which will be an integration of broadband multimedia services covering both 4G mobile and fixed wireless systems). * Offers a complete treatment of multi-carrier, spread-spectrum (SS) and time division multiplexing (TDM) techniques * Provides an in-depth insight into hybrid multiple access techniques based on multi-carrier (MC) transmission * Presents numerous hybrid multiple access and air interface architectures including OFDM/CDMA, MC-CDMA, MC-DS-CDMA and MT-CDMA * Covers new techniques such as space-time coding and software radio Telecommunications engineers, hardware & software system designers and researchers as well as students, lecturers and technicians will all find this an invaluable addition to their bookshelf.

Frequency spectrum is a limited and valuable resource for wirelesscommunications. A good example can be observed among networkoperators in Europe for the prices to pay for UMTS-frequency bands.Therefore, the first goal when designing future wirelesscommunication systems (e.g. 4G - fourth generation) has to be theincrease in spectral efficiency. The development in digitalcommunications in the past years has enabled efficient modulationand coding techniques for robust and spectral efficient dataspeech, audio and video transmission. These are the multi-carriermodulation (e.g. OFDM) and the spread spectrum technique (e.g.DS-CDMA), where OFDM was chosen for broadcast applications (DVBDAB) as well as for broadband wireless indoor standards (ETSIHIPERLAN-II, IEEE-802.11) and the DS-CDMA was selected in mobilecommunications (IS-95, third generation mobile radio systems worldwide, UMTS/IMT 2000).Since 1993 various combinations of multi-carrier (MC) modulationand the spread spectrum (SS) technique have been introduced and thefield of MC-SS communications has become an independent andimportant research topic with increasing activities. Newapplication fields have been proposed such as high rate cellularmobile, high rate wireless indoor and LMDS. It has been shown thatMC-SS offers the high spectral efficiency, robustness andflexibility that is required for the next generation systems.Meanwhile, different alternative hybrid schemes such as OFDM/OFDMAMC-TDMA, etc. have been deeply analysed and adopted in differentinternational standards (ETSI-BRAN, IEEE-802 & MMAC).Multi-Carrier & Spread-Spectrum: Analysis of Hybrid AirInterfaces draws together all of the above mentioned hybrid schemestherefore providing a greatly needed resource for system engineerstelecommunication designers and researchers in order to enable themto develop, build and deploy several schemes based onMC-transmission for the next generation systems (which will be anintegration of broadband multimedia services covering both 4Gmobile and fixed wireless systems).* Offers a complete treatment of multi-carrier, spread-spectrum(SS) and time division multiplexing (TDM) techniques* Provides an in-depth insight into hybrid multiple accesstechniques based on multi-carrier (MC) transmission* Presents numerous hybrid multiple access and air interfacearchitectures including OFDM/CDMA, MC-CDMA, MC-DS-CDMA andMT-CDMA* Covers new techniques such as space-time coding and softwareradioTelecommunications engineers, hardware & software systemdesigners and researchers as well as students, lecturers andtechnicians will all find this an invaluable addition to theirbookshelf.

Foreword.Preface.Acknowledgements.Introduction.1. Fundamentals.Radio Channel Characteristics.Multi-Carrier Transmission.Spread Spectrum Techniques.Multi-Carrier Spread Spectrum.References.2. MC-CDMA and MC-DS-CDMA.MC-CDMA.MC-DS-CDMA.References.3. Hybrid Multiple Access Schemes.Introduction.Multi-Carrier FDMA.Multi-Carrier TDMA.Ultra Wide Band Systems.Comparison of Hybrid Multiple Access Schemes.References.4. Implementation Issues.Multi-Carrier Modulation and Demodulation.Synchronization.Channel Estimation.Channel Coding and Decoding.Signal Constellation, Mapping, Demapping, Equalization.Adaptive Techniques in Multi-Carrier Transmission.RF issues.References.5. Applications.Introduction.Cellular Mobile Communications Beyond 3G.Wireless Local Area Networks.Fixed Wireless Access below 10 GHz.Interaction Channel for DVB-T: DVB-RCT.References.6. Additional Techniques for Capacity and FlexibilityEnhancement.Introduction.General Principle of Multiple Antenna Diversity.Diversity Techniques for Multi-Carrier TransmissionExamples of Applications of Diversity Techniques.Software-Defined Radio.References.Definitions, Abbreviations and Symbols.Index.