wcdma
DESCRIPTION
WcdmaTRANSCRIPT
Nat
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l Ins
titu
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f S
cien
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
“W-CDMA”
Presented bySangram Keshari Nayak
Roll#EC200117075
Under the guidance of Mr. N. Srinivasu
Nat
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[2]
Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
WHAT IS W-CDMA?
W-CDMA stands for wideband code division multiple access
A 3G network having higher capacity
Uses a spectrum with 5MHz carrier
Nat
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
GENERAL INFORMATION ON CDMA
How does CDMA work ?
What is the difference between CDMA one and CDMA2000?
Nat
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
GENERAL INFORMATION ON CDMA
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.
Nat
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
W-CDMA BASIC CHARACTERISTICS
Bit-error rate
Acquisition and tracking of the spreading sequences
Power control
Fading statistics
Nat
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
SPREAD SPECTRUM CODING
Performance characteristics of wcdma
Nat
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
PARAMETERS OF WCDMA
Data and chip rate
Channel bandwidth
Spreading and modulation
Handover
Nat
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
W-CDMA DESIGN ISSUES 1.TURBO CODING
Turbo Encoder
Nat
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
TURBO DECODER
W-CDMA DESIGN ISSUES
Nat
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[10]
Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
2. INTERFERENCE-CANCELLATION TECHNIQUES
Interference Cancellation Concept
W-CDMA DESIGN ISSUES
Nat
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
WCDMA SYSTEM
Nat
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[12]
Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
RADIO NETWORK FUNCTIONALITY
Power control
Soft handover
Soft Hand Over Process
Nat
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Technical Seminar Presentation
Sangram Keshari Nayak(EC200117075)
UPGRADE GSM TO WCDMA
Wcdma channels