School of Electrical and Electronics Engineering

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Browsing School of Electrical and Electronics Engineering by Author "Kibet, Philip Langat"

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    Performance Analysis of Pulse Shaping Filter for WCDMA Applications
    (2014) Ombongi, Filbert Onkundi; Kibet, Philip Langat; Musyoki, Stephen M
    The wireless systems with spreading of a signal experiences time delay which has to be smaller compar ed to symbol period of the data. The condition can’t be met in high data rate transmissions which make this delay to be greater than that of the data symbol period which results in inter - symbol interference (ISI) due to serial transmission. Therefore, a p erformance of pulse shaping filter for use in WCDMA needs to be optimized to reduce ISI for a rate of 2Mbps. The system is simulated in MATLAB with 16 - QAM modulation and channel coding . The error rates are determined with a variation in the f ilter roll off factor (α) . The results have shown that the performance of a wireless communication system depends on the filter roll off factor. Therefore, there must be a trade - off between filter complexity and power efficiency in determining an optimum roll - off factor which gives minimum error rate