Scope of Work IN WCDMA SYSTEM WITH DIFFERENT CHANNEL CONDITIONS-WCDMA SYSTEM

PERFORMANCE ANALYSIS ON MODULATION TECHNIQUES IN

WCDMA SYSTEM WITH DIFFERENT CHANNEL CONDITIONS

 

1.8     Scope of Work

This research thesis is based on study and simulation using scientific computer simulation

software, MatLab 7.1. It will be simulated in multi-user environment based on Direct Sequence Spread Spectrum (DSSS), Wideband-Code Division Multiple Access (W-CDMA). There will be no error correction coding or channel coding employed for this simulation models.

There are two extreme cases of channel noise and fading that will be subjected to the WCDMA system models. First, the model is simulated with different modulation techniques under thermal noise, represented by Additive White Gaussian Noise (AWGN). Then, the channel is simulated with various different parameters using Non-line of sight (N-LOS) multiple reflected rays representing multipath Rayleigh Fading.

The performance of the modulation schemes are studied when the mobile terminal is static and dynamic with different speeds. The performance analysis is based on BER and Signal-to- Noise ratio. Thus, suitable modulations techniques will be determined and concluded based on BER that will be plotted as a function of SNR.

The current development to achieve high data rate cellular communication drives the interest of this research. There are many significant areas that could give boost to the improvement of W-CDMA system such as modulation scheme and error correction and so on.

Thus, this thesis will analyze suitable modulation techniques that are capable of delivering higher data rate without compromising errors in multipath fading environment. The performance of these modulation techniques will be simulated by using computer simulation tool, MatLab 7.1.

1.9     Thesis Outline

This thesis is organized into six chapters.

Chapter 1 provides an overview of this thesis which includes problem background and objectives.

Chapter 2 gives in depth explanation on WCDMA system that relates to this research scope, while Chapter 3 deals with the modulation schemes of the system.

Chapter 4 covers the simulation methodology used in this research which based on Matlab software. Detailed explanation of the WCDMA model used in the simulation is also presented which including the transmitter, receiver and channel design.

Chapter 5 presents the results and analysis of the simulation. The results of each WCDMA model are analyzed. Each subsection is ended by some discussion on the results.

Chapter 6 concludes the thesis with some suggestions on future development and conclusion on the work conducted throughout this thesis.

 

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