WCDMA 编码与调制

Standardization of WCDMA / UMTS
The 3rd Generation Partnership Project (3GPP)
Role: Create 3G Specifications and Reports 3G is standardized based on the evolved GSM core networks and the supporting Radio Access Technology
Physical Channels
Primary Common Control Physical Channel (PCCPCH) Secondary Common Control Physical Channel (SCCPCH)
Syed Mohammed Zafi Sherhan Shah (04TL 20) Ali Madad Shah (04TL 31) Farrukh Hussain Arain (04TL 35) Ahsan Pervaiz Bhatti (04TL 58) Sandar Ali Khowaja (04TL 30) Rizwan Ali Shah (04TL 03) Syed Mohammed Zafi Sherhan Shah (04TL 20) Syed Mohammed Zafi Sherhan Shah (04TL 20) Syed Mohammed Zafi Sherhan Shah (04TL 20)

Introduction UMTS Releases Introduction to Physical layer Physical Channel Mapping (3GPP TS 25.211) Physical layer procedures (3GPP TS 25.214) Handovers in UMTS Coding & Multiplexing (3GPP TS 25.212) Spreading & Modulation (3GPP TS 25.213) Simulation and Results
Syed Mohammed Zafi Sherhan Shah (04TL 20) Ali Madad Shah (04TL 31) Farrukh Hussain Arain (04TL 35) Ahsan Pervaiz Bhatti (04TL 58) Sandar Ali Khowaja (04TL 30) Rizwan Ali Shah (04TL 03) Syed Mohammed Zafi Sherhan Shah (04TL 20) Syed Mohammed Zafi Sherhan Shah (04TL 20) Syed Mohammed Zafi Sherhan Shah (04TL 20)
GSM
Introduction of GPRS / E-GPRS
3GPP Release ‘99
3GPP Release 4
3GPP Release 5-6 All IP Vision
Study and Simulation of UMTS Physical layer

Introduction UMTS Releases Introduction to Physical layer Physical Channel Mapping (3GPP TS 25.211) Physical layer procedures (3GPP TS 25.214) Handovers in UMTS Coding & Multiplexing (3GPP TS 25.212) Spreading & Modulation (3GPP TS 25.213) Simulation and Results

Very high and variable bit rates:

Fra Baidu bibliotek
Different QoS for different connections. High spectrum efficient. Coexistence with current systems
144 kbps: vehicle speed, rural environ. 384 kbps: walking speed, urban outdoor. 2048 kbps: fixed, indoor.
Features of UMTS

Frequency Bands


RF Carrier Spacing

1920 to 1980 MHz (Uplink) 2110 to 2170 MHz (Downlink) 5 MHz
RF Channel Raster

Two modes of operations

Introduction UMTS Releases Introduction to Physical layer Physical Channel Mapping (3GPP TS 25.211) Physical layer procedures (3GPP TS 25.214) Handovers in UMTS Coding & Multiplexing (3GPP TS 25.212) Spreading & Modulation (3GPP TS 25.213) Simulation and Results
Channel Mapping
Transport Channels
BCH FACH PCH RACH DCH DSCH CPCH Physical Random Access Channel (PRACH) Dedicated Physical Data Channel (DPDCH) Dedicated Physical Control Channel (DPCCH) Physical Downlink Shared Channel (PDSCH) Physical Common Packet Channel (PCPCH) Synchronization Channel (SCH) Common Pilot Channel (CPICH)
Functions of the Physical layer

Physical layer provides data transport support to higher layers via Transport Channels

Error detection. FEC encoding/decoding. Rate Matching/Dematching. Multiplexing/Demultiplexing different Transport Channels into/from a Coded Composite Transport Channel (CCTrCH). Mapping/Demapping of CCTrCH into/from Physical Channels. Modulation and Spreading/Demodulation and Despreading. Power Weighting and combining of physical channels. RF Processing. …
Thesis Presentation
Study and Simulation of UMTS Physical layer (Rel ’99 for Downlink)

Study and Research Physical layer standards Physical Channel Mapping TS 25.211 v3.6.0 Coding and Multiplexing TS 25.212 v3.6.0 Spreading and Modulation TS 25.213 v3.6.0 Physical layer Procedures TS 25.214 v3.6.0
Transport Channels
Common Broadcast Channel (BCH) Paging Channel (PCH) Random Access Channel (RACH) Forward Access Channel (FACH) Downlink Only Downlink Shared Channel (DSCH) Common Packet Channel (CPCH) Uplink Only Uplink / Downlink Dedicated Dedicated Channel (DCH)








Physical Channel Mapping
3GPP TS 25.211 v3.6.0
What are transport channels?
Transport Channels are those which Carry data and signalling information from higher layer upto the physical layer. This means that they are not sent on the air interface. These channels are mapped to physical Channels which are sent on the air interface.


200 KHz
Time Division Duplex (TDD)
Frequency Division Duplex (FDD)

Implemented in form in China as TD-SCDMA Implemented worldwide as HSDPA
Study and Simulation of UMTS Physical layer








Introduction to UMTS Physical layer

Universal Mobile Telecommunication System Based on Wideband Code Division Multiple Access It is one of the five interfaces adopted by the ITU under the name “IMT-2000 Direct Spread” WCDMA can support multiple and simultaneous communications such as voice, images, data, and video

Simulation

Mathworks’ Simulink Model design according to above mention standards Shall simulate in Matlab
Study and Simulation of UMTS Physical layer
Syed Mohammed Zafi Sherhan Shah (04TL 20) Ali Madad Shah (04TL 31) Farrukh Hussain Arain (04TL 35) Ahsan Pervaiz Bhatti (04TL 58) Sandar Ali Khowaja (04TL 30) Rizwan Ali Shah (04TL 03) Syed Mohammed Zafi Sherhan Shah (04TL 20) Syed Mohammed Zafi Sherhan Shah (04TL 20) Syed Mohammed Zafi Sherhan Shah (04TL 20)