000 03536nas|a2200457 i 4500
005 20260817162901.0
008 030696s1995 th uu m rtt 00| a1eng d
035 _a.b11489613
099 9 _aAIT RSPR no. TC-95-13
100 0 _aNuttavudh Satravaha
245 1 0 _aApplication of geometric dynamic channel allocation in a Low Earth Orbit (LEO) satellite system
260 _aBangkok :
_bAsian Institute of Technology,
_c1995
300 _a43 leaves
490 1 _aResearch studies project report ;
_vno. TC-95-13
500 _aA research study submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology
502 _aResearch Studies Project Report (M. Eng.) - Asian Institute of Technology, 1995
520 _aIn this research study an investigation into a low-complexity Soft-Output Viterbi Equalization (SOVE) is made. The algorithm delivers M-ary reliability information for each detected symbol. The reliability information value is calculated by using Bayes' theorem. Two solutions oflow-complexity SOVE named one-dimensional Vertical update SOVE (V-SOVE) and one-dimensional Horizontal update SOVE (H-SOVE) are presented and applied at the cost of suboptimality. The quality of the soft-outputs produced from the V-SOVE and H-SOVE is evaluated in terms of Bit Error Rate (BER). The performance of the system using the V-SOVE and the H-SOVE is simulated by use of computer simulation. The Typical Urban channel specified by GSM standards and the n/4- shifted Differential Quadrature Phase Shift Keying (DQPSK) modulation method are used in the simulation model. Perfect knowledge of the channel coefficients are assumed in the simulation work. Comparisons between the performance of the V-SOVE, the H-SOVE and the classical Viterbi Equalizer (VE) are made.
650 1 0 _aArtificial satellites in telecommunication
700 1 _aMakelainen, Kimmo,
_eChairperson
700 0 _aChindakorn Tuchinda,
_eExamination Committee
700 1 _aZhang, Jian-Guo,
_eExamination Committee
710 2 _aFinnish International Development Agency (FINNIDA), Finland,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tResearch studies project report ;
_vno. TC-95-13
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B15374
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