An Guirnela, Maria Carmela P. creator O'Farrell, T. Chairperson (Chairman - upto 31/10/94) Ahmed, Kumar M. Chairperson (Chairman - from 01/11/94) Makeliiinen, Kimmo Examination committee Sharma, A.B. Examination Committee Finnish International Development Agency (FINNIDA) Scholarship donor text series technical report th Bangkok Asian Institute of Technology 1994 continuing eng 53 leaves A DS-SSMA system model which applied windowing functions at the transmitter and at the correlator receiver is presented. Two windowing schemes are considered in this study -- the data bit windowing and the chip windowing. An analytical expression for the signal-to-noise interference-ratio (SNR) is developed for both schemes to determine the system performance using various windows. Effects on the correlation of pseudo-noise (PN) sequences are investigated and numerical results are presented. It is shown that both schemes result in an improved lower crosscorrelation values but an unsatisfactorily reduced peak in the autocorrelation function. Based on these resulting characteristics, the system performance is degraded with the use of windowing functions and that the rectangular window, equivalent to no windowing applied, is still unequaled. A research submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Research Studies Project Report (M.Eng.) - Asian Institute of Technology, 1994 Spread spectrum communications Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B15583 http://203.159.5.9/ait-thesis/detail.php?q=B15583 121095 20260818144349.0