03062nam a2200433 4500 20260817162923.0 180698 th eng .b11492879 AIT Thesis no.TC-95-7 Han, Wei The application of multirate techniques for synchronization in fully digital demodulation Bangkok : Asian Institute of Technology, 1995 66 leaves : ill. Thesis ; no. TC-95-7 Thesis (M.Eng.) - Asian Institute of Technology, 1995 A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering. This study presents an multirate technique as a timing recovery scheme for digital cellular mobile systems in the digital signal processing environment. n/4-shifted-DQPSK modulation is used according to the North American IS-54 TDMA frame structure. The feasibility of the application of square in-phase and quadrature (SIQ) signal phases as a timing recovery detection signal and their BER performances in fading channels corrupted by CCI and A WGN, are investigated in MATLAB. The phase searching processor is a unit that can extract the appropriate timing instant by comparing the SIQ signal phase with the reference signal phase. The phase adjuster, which is employed to diminish phase distortion caused by fading channel, is used to implement synchronizer design. Its BER performance is measured and compared with the expected performance under various operating conditions, such as two rays Rayleigh fading channel or six bins channel based on the GSM specification, and with interferer from varying power. Cellular radio Makelainen, Kimmo, Chairperson Ahmed, Kazi Mohiuddin, Examination Committee Zhang, Jian-Guo, Examination committee Government of Japan, Scholarship donor Asian Institute of Technology. Thesis ; no. TC-95-7 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B15298 .b11492879 mnait s 240717 0 960603 m a s 4 mnait mnait mnarc mnarc 20 40 Barcode : 30050120813612 CREATED : 1994-12-18 RECORD # : i11753602 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120813646 CREATED : 1994-12-18 RECORD # : i11753614 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160046065 CREATED : 2016-02-03 RECORD # : i12887547 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050211018717 CREATED : 2022-03-17 RECORD # : i13373778 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 6722 6722 0 0 0 0 MAIN MAIN mnait 2026-08-17 30.00 0 AIT Thesis no.TC-95-7 30050120813612 2026-08-17 16:29:23 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnait 2026-08-17 30.00 0 AIT Thesis no.TC-95-7 30050120813646 2026-08-17 16:29:23 2 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.TC-95-7 30050160046065 2026-08-17 16:29:23 2026-08-17 40 0 0 0 0 MAIN MAIN mnarc 2026-08-17 50.00 0 AIT Thesis no.TC-95-7 30050211018717 2026-08-17 16:29:23 3 2026-08-17 20