Non-conventional multi-carrier air interface for mobile radio systems [Elektronische Ressource] = Nicht-konventionelle Multiträger-Luftschnittstelle für Mobilfunksysteme / von Alessio Filippi

Informations

• Publié par: technische_universitat_kaiserslautern
• Publié le: 01 janvier 2005
• Nombre de lectures: 27
• Langue: English
• Poids de l'ouvrage: 1 Mo

Extrait

Alessio Filippi
via Scapacchi`o est 5
35030 Saccolongo (PD)
Italien
Non-conventional multi-carrier air interface
for mobile radio systems
deutscher Titel:
Nicht-konventionelle Multitr¨ager-Luftschnittstelle fu¨r
Mobilfunksysteme
Vom Fachbereich Elektrotechnik und Informationstechnik
der Technischen Universit¨at Kaiserslautern
zur Verleihung des akademischen Grades
Doktor der Ingenieurwissenschaften (Dr.–Ing.)
genehmigte Dissertation
von
Ing. Alessio Filippi
D 386
Tag der Einreichung: 22. Oktober 2004
Tag der mu¨ndlichen Pru¨fung: 9. February 2005
Dekan des Fachbereichs: Prof. Dr.-Ing. G. Huth
Vorsitzender der
Pru¨fungskommission: Prof. Dr.-Ing. Tielert
1. Berichterstatter: Prof. Dr.-Ing. habil. Dr.-Ing. E.h. P.W. Baier
2. Berichterstatter: Prof. Dr.rer.nat. Dr.h.c. H. RohlingI
Vorwort
This work was carried out at Siemens AG, Munich, Germany, from April 2002 to Decem-
ber2004. IworkedthereasanexternalPhDcandidateofprofessorP.W.Baier,University
of Kaiserslautern. I would like to thank all the people who have given me the possibility,
strength and support to complete this PhD thesis.
I thank Prof. Dr.-Ing. habil. Dr.-Ing. E.h. P.W. Baier for the useful guidelines and
the fruitful discussions. I have learnt a lot from him, both from the prefessional and
human point of view.
Warm thanks are extended to Prof. Dr.rer.nat. Dr.h.c. H. Rohling for acting as a
reviewer of my thesis and for his comments, which lead to important improvements.
I am very grateful to Siemens AG, ICM N PG NT RC FR who supported my stud-
ies during this three-year long experience. Particular thanks go to the collegues working
at ICM N PG NT RC FR and particularly to Dr. E. Schulz. Special thanks to Dr. M.
Weckerle for the useful tips on the Kaiserslautern’s rules and above all to Dr. E. Costa
for the technical discussions, the endless support and the friendship.
Thanks to Jessie, Guixia, Dan, Roger and Maran who are sharing my same experience at
Siemens AG.
Last but not least, I would like to thank my family. In Italy: my mother, my father,
my brothers and all my relatives in Saccolongo. In Germany: my wife Corinna to whom
this thesis is dedicated.
Mu¨nchen, October 2004 Alessio FilippiCONTENTS III
Contents
1 Introduction 1
1.1 Multi-carrier modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1.2 Orthogonal Frequency Division Multiplexing . . . . . . . . . . . . . 3
1.1.3 A more general framing . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1.4 Data symbol specific transmit signature . . . . . . . . . . . . . . . 8
1.1.5 State of the art . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1.2 Goals of the thesis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.3 Contents and important results . . . . . . . . . . . . . . . . . . . . . . . . 16
2 Modelling of linear transmission systems 18
2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.2 General system model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.1 System structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.2 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.2.3 Transmission over the channel . . . . . . . . . . . . . . . . . . . . . 20
2.2.4 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.3 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.3.1 Matched filter estimate . . . . . . . . . . . . . . . . . . . . . . . . . 21
2.3.2 Noise covariance matrix . . . . . . . . . . . . . . . . . . . . . . . . 22
2.3.3 Post processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.4 Proposed classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
2.4.2 Single carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
2.4.3 Multi-carrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.4.4 Hybrid systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2.4.5 Generalised hybrid systems . . . . . . . . . . . . . . . . . . . . . . 28
2.5 Conventional OFDM framed as hybrid system . . . . . . . . . . . . . . . . 29
2.5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
2.5.2 Transmit signal generation and receive signal processing . . . . . . 29
2.5.3 Mathematical modelling . . . . . . . . . . . . . . . . . . . . . . . . 30
2.6 Quality criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.6.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.6.2 Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.6.3 SNR-degradation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2.6.4 Bounds of the SNR-degradation . . . . . . . . . . . . . . . . . . . . 37
2.6.5 Example of trade-off . . . . . . . . . . . . . . . . . . . . . . . . . . 39
2.6.6 Measures for conventional OFDM . . . . . . . . . . . . . . . . . . . 41
2.7 On the structure of the system matrix A . . . . . . . . . . . . . . . . . . . 44
2.7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44IV CONTENTS
2.7.2 Existing symmetries . . . . . . . . . . . . . . . . . . . . . . . . . . 44
2.7.3 Channel impact on the system matrix A . . . . . . . . . . . . . . . 48
2.8 Special setting of the model . . . . . . . . . . . . . . . . . . . . . . . . . . 49
2.8.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
2.8.2 Point to multi-point . . . . . . . . . . . . . . . . . . . . . . . . . . 50
2.8.3 Multi-point to point . . . . . . . . . . . . . . . . . . . . . . . . . . 53
3 Considered system implementations 54
3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3.2 Reference system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
3.2.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
th3.2.2 Parameters for 4 generation mobile radio systems . . . . . . . . . 56
3.2.3 OFDM over an AWGN channel . . . . . . . . . . . . . . . . . . . . 59
3.2.4 SC, MC and HY systems with equal resource consumption . . . . . 60
3.3 Choice of parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.3.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
3.3.2 Fixed parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.3.3 Variable parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 66
3.3.4 Gaussian basic transmit signature . . . . . . . . . . . . . . . . . . . 69
3.3.5 Proposed values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
3.3.6 Choice of an AWGN channel . . . . . . . . . . . . . . . . . . . . . . 74
3.4 Evaluation of the proposed approach . . . . . . . . . . . . . . . . . . . . . 77
3.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
3.4.2 Channel capacity in the proposed modelling . . . . . . . . . . . . . 77
4 Simulations 81
4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
4.2 Single carrier systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
4.2.1 Rectangular basic transmit signature . . . . . . . . . . . . . . . . . 82
4.2.2 Sinc shaped basic transmit signature . . . . . . . . . . . . . . . . . 84
4.2.3 Gaussian basic transmit signature . . . . . . . . . . . . . . . . . . . 85
4.2.4 Square root raised cosine basic transmit signature . . . . . . . . . . 87
4.3 Multi-carrier systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
4.3.1 Rectangular basic transmit signature . . . . . . . . . . . . . . . . . 89
4.3.2 Sinc shaped basic transmit signature . . . . . . . . . . . . . . . . . 92
4.3.3 Gaussian basic transmit signature . . . . . . . . . . . . . . . . . . . 93
4.3.4 Square root raised cosine basic transmit signature . . . . . . . . . . 94
4.3.5 SC and MC duality . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
4.4 Hybrid systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
4.4.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
4.4.2 Rectangular basic transmit signature . . . . . . . . . . . . . . . . . 97
4.4.3 Sinc shaped basic transmit signature . . . . . . . . . . . . . . . . . 100CONTENTS V
4.4.4 Gaussian basic transmit signature . . . . . . . . . . . . . . . . . . . 102
4.4.5 Square root raised cosine basic transmit signature . . . . . . . . . . 104
4.5 Proposed approach as increment of the channel capacity . . . . . . . . . . 106
4.5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
4.5.2 Single carrier systems . . . . . . . . . . . . . . . . . . . . . . . . . . 107
4.5.3 Multi-carrier systems . . . . . . . . . . . . . . . . . . . . . . . . . . 112
4.5.4 Hybrid systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
5 Discussion on simulations: Recommendations 119
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .