Transmitter Block:

Implementation of Physical Layer Transceiver Module for WCDMA System Objective:

To implement the WCDMA Physical Layer protocol Transceiver Module on Matlab Simulink.

Project Description: Wideband-CDMA (W-CDMA), the transmission technology for third generation (3G) UMTS mobile communication, can be implemented by migrating via GPRS and EDGE on the 2G network infrastructure of the GSM standard that is used in Europe and worldwide. W-CDMA allows transmission of signals for various services with variable data rates on 5 MHz bandwidths

The input signal is, character datas are converted into the packets. The CRC is used to determine whether the transmission error is occurred or not. Here the Turbo encoder is used for the Encoding operation. Here the Encoder type is 1/3 encoder. The Interleavers are used to reduce Burst Error. QPSK modulation technique is implemented in Modulator. Hence four sub carrier is enough to represent our data bits. This modulation is helpful to avoid the amplifier linearity problems. It is a Quadrature Phase Shift Keying (QPSK) modulation scheme in which a delay is introduced into one of the quadrature processing elements equal to one-half the duration of the binary symbols or packets being modulated. OVSF coder used to give identity to user. Then the data bits are converted into time domain then transmitted. In Receiver Turbo decoder which is having the BER of 10-6 used to decode the original data without any error symbols.Transmitter Block:

Receiver Block:

CRC

Conv.Encoder #1

Packet Data

Interleaver

Conv.Encoder #2

Mux

QAM

Modulation

OVSF Code

Scrambler

IFFT

Packet Formation

Data i/p

RF Module

RF Module

Descrambler

QAM demodulation

Demux

Data Out

CRC controller

DeInterleaver

Turbo.Decoder

FFT