Abstract
In recent times the Wideband Code Division Multiple Access (WCDMA) is one of the most used. This is because it provides higher data rates in mobile communication and it provides the users with many multimedia applications such as video streams and high resolution pictures. In other to enhance the performance of the technology a suitable modulation technique and error correcting technique is implemented.in this paper I have done performance analysis of different spread spectrum sequence with the Quadrature Phase Shift Keying (QPSK) modulation technique when the system is subjected to multipath Rayleigh fading and Additive White Gaussian Noise (AWGN). The research has been done using MATLAB for simulation and evaluation of the bit error rate for the WCDMA system models.
Highlights
Current generation systems are designed to support multimedia applications
In 2G communication systems, Gaussian Minimum Shift Keying (GMSK) modulation scheme is widely used in GSM communication
This paper focuses on the performance measurement of high data rate modulation schemes in channels which are subjected to Multipath Rayleigh Fading and Additive White Gaussian Noise (AWGN)
Summary
Current generation systems are designed to support multimedia applications. For this reason, the WCDMA supports higher capacity and has better limiting features of multipath propagating effects. This paper focuses on the performance measurement of high data rate modulation schemes in channels which are subjected to Multipath Rayleigh Fading and Additive White Gaussian Noise (AWGN). 2. Related Works [1] in their paper compared modulation technique using M-ary Quadrature Amplitude Modulation (QAM) and Quadrature Phase Shift Keying (QPSK) are considered in Wideband Code Division Multiple Access (WCDMA) system. This research was carried out in the presence of Rayleigh fading with AWGN From their simulation results, it was seen that BER of WCDMA can be improved drastically by using Walsh code. [4] paper describes an efficient way of implementing the hardware of a sign Walsh transform Such a non-linear transform converts binary/ternary vectors into the spectral domain and is important in many signal processing applications including CDMA coding and the analysis of logic design. The approach used is based on fixed butterfly diagrams that are implemented in hardware
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