GMSK two-bit differential detector performance enhancement with symmetric detection by using bit stuffing /
Differential detection of the GMSK is an attractive
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1998.
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| Subjects: |
| Summary: | Differential detection of the GMSK is an attractive demodulation technique in burst mode transmission, such as time division multiple access (TDMA) systems, because the circuit configuration is simple and carrier recovery is not necessary. In the differential detection , a reference signal pulse is usually delayed one or two bits. However, as a reference signal pulse, n-bit (n>=3) delayed pulse can be used. It was found that the two-bit differential detection of the differentially encoded GMSK had a better performance than that of one-bit or n-bit (n>=3) differential detection [2]. But the two-bit differential detector's eye diagram is asymmetric to zero dc level so a proper dc bias, namely threshold, is required for accurate detection. Moreover the optimum threshold is different and should be found in each [Eb/No] which is very exhaustive and time consuming. In this thesis, a bit stuffing scheme is investigated for the two-bit differential detector which enables removal of small phase change bit patterns and allows the eye opening to be symmetric. Correspondingly, performance is dramatically enhanced. |
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| Item Description: | Vita. "Major subject: Electrical Engineering". |
| Physical Description: | ix, 64 leaves : illustrations ; 28 cm. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: pages 41-43. |