2026-09-19T05:20:24Zhttps://dspace.mit.edu/server/oai/requestoai:dspace.mit.edu:1721.1/166772022-01-13T07:54:29Zcom_1721.1_7582com_1721.1_7581col_1721.1_131023
Walid Hamdy and Dina Katabi.
Cen, Jia Fu, 1981-
Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
2005-05-17T14:53:50Z
2005-05-17T14:53:50Z
2004
2004
http://hdl.handle.net/1721.1/16677
56960716
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.
Includes bibliographical references (leaves 65-66).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Multiframe Interleaving (MFI) is the support of 40 and 80ms supplemental channel frames for CDMA2000 1X. Longer frames improve interleaver performance by separating adjacent symbols further in time and thus require less E[sub]b/N[sub]t, in burst noise conditions, to maintain a target FER at a given data rate. The overall benefit is to improve throughput capacity for today's high bandwidth cellular services. This thesis analyzes the average power usage and data throughput with longer frames for various channel models and radio configurations. Through experimental and simulative testing in a laboratory setting, MFI is shown to use less power per unit of throughput at the link layer in slow fading, single path channel environments. However, gains over 20ms frames diminish for faster fading and multipath, and the limitation of the forward link scheduler in accurately predicting channel conditions handicaps any gains at the link level.
by Jia Fu Cen.
M.Eng.
127 leaves
1651697 bytes
1705523 bytes
application/pdf
application/pdf
eng
Massachusetts Institute of Technology
M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.
http://dspace.mit.edu/handle/1721.1/7582
Electrical Engineering and Computer Science.
A performance study of Multiframe Interleaving for CDMA2000 1X cellular system
Performance study of MFI for CDMA2000 1X cellular system
Thesis
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<Abstract>Multiframe Interleaving (MFI) is the support of 40 and 80ms supplemental channel frames for CDMA2000 1X. Longer frames improve interleaver performance by separating adjacent symbols further in time and thus require less E[sub]b/N[sub]t, in burst noise conditions, to maintain a target FER at a given data rate. The overall benefit is to improve throughput capacity for today's high bandwidth cellular services. This thesis analyzes the average power usage and data throughput with longer frames for various channel models and radio configurations. Through experimental and simulative testing in a laboratory setting, MFI is shown to use less power per unit of throughput at the link layer in slow fading, single path channel environments. However, gains over 20ms frames diminish for faster fading and multipath, and the limitation of the forward link scheduler in accurately predicting channel conditions handicaps any gains at the link level.</Abstract>
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