wcdma

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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

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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

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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?

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[4]

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.

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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

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Technical Seminar Presentation

Sangram Keshari Nayak(EC200117075)

SPREAD SPECTRUM CODING

Performance characteristics of wcdma

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Technical Seminar Presentation

Sangram Keshari Nayak(EC200117075)

PARAMETERS OF WCDMA

Data and chip rate

Channel bandwidth

Spreading and modulation

Handover

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Technical Seminar Presentation

Sangram Keshari Nayak(EC200117075)

W-CDMA DESIGN ISSUES 1.TURBO CODING

Turbo Encoder

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Technical Seminar Presentation

Sangram Keshari Nayak(EC200117075)

TURBO DECODER

W-CDMA DESIGN ISSUES

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[10]

Technical Seminar Presentation

Sangram Keshari Nayak(EC200117075)

2. INTERFERENCE-CANCELLATION TECHNIQUES

Interference Cancellation Concept

W-CDMA DESIGN ISSUES

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Technical Seminar Presentation

Sangram Keshari Nayak(EC200117075)

WCDMA SYSTEM

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[12]

Technical Seminar Presentation

Sangram Keshari Nayak(EC200117075)

RADIO NETWORK FUNCTIONALITY

Power control

Soft handover

Soft Hand Over Process

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Technical Seminar Presentation

Sangram Keshari Nayak(EC200117075)

UPGRADE GSM TO WCDMA

Wcdma channels