|
Appendices
………………………….………………………………………………………………….168
List of Figures and TablesBog'liq pon3
Appendices
………………………….………………………………………………………………….168
List of Figures and Tables
Integrated Wireless-PON Access Network Architectures
viii
List of Figures
Figure 1-1: A model of next-generation access networks .......................................................................... 2
Figure 1-2: PON versus active Ethernet deployment .................................................................................. 6
Figure 1-3: WiMAX deployment worldwide .............................................................................................. 9
Figure 2-1: Conceptual architecture of a TDM-PON ................................................................................ 18
Figure 2-2: WiMAX deployment scenario ................................................................................................ 21
Figure 2-3: NG-PON roadmap .................................................................................................................. 25
Figure 2-4: Multi-wavelength EPON ........................................................................................................ 26
Figure 2-5: Enhancement band for gigabit capable optical access networks ............................................ 27
Figure 2-6: NG-PON use cases ................................................................................................................. 29
Figure 3-1: Generic architecture for mm-wave transmission .................................................................... 41
Figure 3-2: Triple-Format radio-over-fiber experimental set-up with long-wavelength VCSEL ............. 44
Figure 3-3: PHY structure of emerging broadband wireless networks ..................................................... 46
Figure 3-4: Roof-top deployment scenario ................................................................................................ 47
Figure 3-5: Antenna at building facades.................................................................................................... 48
Figure 3-6: Antenna at the pole of a building facade ................................................................................ 48
Figure 3-7: Typical impairments with RoF links ...................................................................................... 49
Figure 3-8: Generating RF signal by direct modulation (left) and external modulation (right) ................ 51
Figure 3-9: A simple point-to-point link for demonstrating fibre chromatic dispersion effects ............... 52
Figure 3-10: Amplitude variations due to fibre chromatic dispersion ....................................................... 53
Figure 3-11: OFDM transmission investigation setup .............................................................................. 54
Figure 3-12: EVM against RF drive power for different fiber lengths ...................................................... 55
Figure 3-13: Constellation diagram of all carriers, 16-QAM .................................................................... 56
Figure 3-14: Co-simulation interface in VPI ............................................................................................. 57
Figure 3-15: General description of inter-software functionalities for WiMAX transceivers .................. 57
Figure 4-1: FDM approach for the proposed optical/wireless integration................................................. 68
Figure 4-2: Example of a mobile WiMAX OFDMA frame ...................................................................... 72
Figure 4-3: VPI/MATLAB components of the OFDM transmitter ........................................................... 73
Figure 4-4: MATLAB interface for OFDM transmitter ............................................................................ 73
Figure 4-5: Quantisation process ............................................................................................................... 74
Figure 4-6: OFDM receiver VPI/MATLAB components ......................................................................... 75
Figure 4-7: MATLAB interface for OFDM receiver ................................................................................ 75
Figure 4-8: High power amplifier (HPA) modelling ................................................................................. 76
Figure 4-9: Output spectrum from HPA .................................................................................................... 77
Figure 4-10: EVM (left) and SFDR (right) estimation for DML .............................................................. 82
Figure 4-11: EVM (left) and SFDR (right) estimation for MZM .............................................................. 84
Figure 5-1: WiMAX over xPON architectural platform ........................................................................... 89
Figure 5-2: FDM approach in the proposed architecture........................................................................... 91
Figure 5-3: Optical line terminal modelling .............................................................................................. 96
Figure 5-4: Optical network unit/base station modeling ........................................................................... 98
Figure 5-5: WiMAX over GPON physical layer simulation test-bed ..................................................... 101
Figure 5-6: Inter-modulation products due to high RF power inside the MZM ...................................... 103
Figure 5-7: EVM versus RF drive power for downstream WiMAX channels ........................................ 104
Figure 5-8: DFB bias current versus power (left) and RIN versus frequency (right) .............................. 105
Figure 5-9: EVM versus laser drive amplitude in upstream .................................................................... 106
Figure 5-10: BER versus SNR for downstream WiMAX signals over faded SUI-4 .............................. 107
Do'stlaringiz bilan baham: |
|
|