Sangram Keshari Nayak presented a technical seminar on W-CDMA at the National Institute of Science and Technology. W-CDMA stands for Wideband Code Division Multiple Access, which is a 3G network that uses a 5MHz carrier spectrum and has higher capacity than previous networks. The presentation covered topics such as how CDMA works, the differences between CDMA variants, W-CDMA characteristics and parameters, design issues like turbo coding and interference cancellation, the WCDMA system, radio network functionality including power control and soft handover, and upgrading from GSM to WCDMA networks.

1. Technical Seminar Presentation
“W-CDMA”
National Institute of Science and Technology [1]
Presented by
Sangram Keshari Nayak
Roll#EC200117075
Under the guidance of
Mr. N. Srinivasu
Sangram Keshari Nayak(EC200117075)

2. Technical Seminar Presentation
WHAT IS W-CDMA?
National Institute of Science and Technology [2]
 W-CDMA stands for wideband code division
multiple access
 A 3G network having higher capacity
 Uses a spectrum with 5MHz carrier
Sangram Keshari Nayak(EC200117075)

3. Technical Seminar Presentation
GENERAL INFORMATION ON CDMA
National Institute of Science and Technology [3]
 How does CDMA work ?
 What is the difference between CDMA one and
CDMA2000?
Sangram Keshari Nayak(EC200117075)

4. Technical Seminar Presentation
GENERAL INFORMATION ON CDMA
National Institute of Science and Technology [4]
 What is the difference between umts and wcdma?
• Universal Mobile Telecommunications System (UMTS)
 Wideband Code Division Multiple Access (WCDMA) is
an air interface standard and it is the key technology for
UMTS.
Sangram Keshari Nayak(EC200117075)

5. Technical Seminar Presentation
W-CDMA BASIC CHARACTERISTICS
National Institute of Science and Technology [5]
 Bit-error rate
 Acquisition and tracking of the spreading
sequences
 Power control
 Fading statistics
Sangram Keshari Nayak(EC200117075)

6. Technical Seminar Presentation
SPREAD SPECTRUM CODING
National Institute of Science and Technology [6]
Performance characteristics of wcdma
Sangram Keshari Nayak(EC200117075)

7. Technical Seminar Presentation
PARAMETERS OF WCDMA
National Institute of Science and Technology [7]
 Data and chip rate
 Channel bandwidth
 Spreading and modulation
 Handover
Sangram Keshari Nayak(EC200117075)

8. Technical Seminar Presentation
W-CDMA DESIGN ISSUES
1.TURBO CODING
National Institute of Science and Technology [8]
Turbo Encoder
Sangram Keshari Nayak(EC200117075)

9. Technical Seminar Presentation
W-CDMA DESIGN ISSUES
National Institute of Science and Technology [9]
TURBO DECODER
Sangram Keshari Nayak(EC200117075)

10. Technical Seminar Presentation
W-CDMA DESIGN ISSUES
National Institute of Science and Technology [10]
2. INTERFERENCE-CANCELLATION TECHNIQUES
Interference Cancellation Concept
Sangram Keshari Nayak(EC200117075)

11. Technical Seminar Presentation
WCDMA SYSTEM
National Institute of Science and Technology [11]
Sangram Keshari Nayak(EC200117075)

12. Technical Seminar Presentation
RADIO NETWORK FUNCTIONALITY
National Institute of Science and Technology [12]
 Power control
 Soft handover
Soft Hand Over Process
Sangram Keshari Nayak(EC200117075)

13. Technical Seminar Presentation
UPGRADE GSM TO WCDMA
National Institute of Science and Technology [13]
Wcdma channels
Sangram Keshari Nayak(EC200117075)