Record Details     « New Search       Brief Record Full Record MARC Record     Bibliographic Data 001    UPD-00000272711 005    20090717000433.0 008    080210s1988 xx eng 040 ## $aDML 041 ## $aeng 042 ## $aDMLUC 090 ## $aLG 995 1988 E6$bL54 100 1# $aLim, Rudy Alkuino 245 12 $aA study of direct-sequence spread spectrum/delta modulation system/$cRudy Alkuino Lim. 260 ## $c1988. 300 ## $a134, [16] leaves 502 ## $aThesis (M.S. Electrical Engineering)--University of the Philippines, Diliman. 520 ## $aThis study focuses on the design, construction, practical and theoretical performance evaluation of Direct-Sequence Spread Spectrum/ Delta Modulation System. The prototype model of the system is a Direct-Sequence Spread Spectrum system intended for digital communication over wire transmission channel using baseband modulation, speficifically Continously Variable Slope Delta Modulation at 16 kbps. The coding used was a maximal-length Gold Code and a test tone of 1 KHZ frequency was used as the input signal in order to determine the performance of the system. The Signal-to-Quantization Noise ratio of the CVSD (Continously Variable Slope Delta Modulator) used was determined both through mathematical calculations and test measurements. The BER of the system was determined theoretically and it is computed with pulse-noise jamming signal introduced in the transmission channel to demonstrate the advantage of spreading the bandwidth of data before transmission. The circuit design of the system was made to make use, as much as possible the available electronic components in the local markets, except for the Adaptive Delta Modulator/ Demodulator, used for general communications which had to be imported from Hongkong. 500 ## $aTypescript. 650 #0 $aSpread spectrum communications. 650 #0 $aDigital communications. 905 ## $aFI 852 ## $aUP$bDARCHIVES$hLG 995$i1988 E6 L54$rRoom-Use Only$xFI-6763T 852 ## $aUP$bDENG-II$hLG 995$i1988 E6 L54$pe2000000341$rRoom-Use Only$xE2-75T 905 ## $aUP 852 ## $aUP$bDARCHIVES$hLG 995$i1988 E6 L54$rRoom-Use Only$xFI-6763T 852 ## $aUP$bDENG-II$hLG 995$i1988 E6 L54$pe2000000341$rRoom-Use Only$xE2-75T 842 ## $aThesis           Physical Location University of the Philippines Diliman Main Library: University Archives LG 995 / 1988 E6 L54 Diliman: College of Engineering Library II LG 995 / 1988 E6 L54           Digital Copy Not Available          Add to Book Cart  |   Download MARC