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008 121095s1994 th uu m rtt 00| a1eng d
035 _a.b10379265
099 9 _aAIT RSPR no. TC-94-08
100 0 _aTran Van Su
245 1 3 _aAn investigation into the performance of DS-SSMA systems using complex signature sequences
260 _aBangkok :
_bAsian Institute of Technology,
_c1994
300 _a53 leaves
490 1 _aResearch studies project report ;
_vno. TC-94-08
500 _aA research submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502 _aResearch Studies Project Report (M.Eng.) - Asian Institute of Technology, 1994
520 _aIn this research study an investigation into performance of direct-sequence spread spectrum multiple-access (DS/SSMA) communications with deterministic complex signature sequences is presented. The Discarding Sorting (DS) and Enhancing Sorting (ES)-Algorithms are introduced to select the good subset with average interference parameter (AIP) criterion. Expressions for the signal to noise ratio (SNR) and the bit error rate (BER) at the output of correlator are derived. These expressions are used to evaluate the SNR and BER performance both as a function of number of simultaneous users and as a Eb/ N 0 . It is shown that the complex sequences can yield better probability of error performance then binary sequences. New users that employ complex signature sequences can be added into existing systems with graceful performance degradation.
650 0 _aSpread spectrum communications
700 1 _aO'Farrell, T.,
_eChairperson (Chairman - upto 31/10/94)
700 1 _aMakelainen, Kimmo,
_eChairperson
700 1 _aErke, Tapio J.,
_eExamination Committee
700 1 _aTakahashi, Kenzo,
_eExamination committee
710 2 _aFinnish International Development Agency (FINNIDA),
_eScholarship donor
810 2 _aAsian Institute of Technology.
_tResearch studies project report ;
_vno. TC-94-08
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B15561
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