NDLI: A two-step time delay difference estimation method for initial random access in satellite LTE system

Content Provider	IEEE Xplore Digital Library
Author	Chengmei Li Hongbo Ba Hexiang Duan Yazhe Gao Jianjun Wu
Copyright Year	2014
Description	Author affiliation: Instn. of Adv. Commun., Peking Univ., Beijing, China (Chengmei Li; Hongbo Ba; Hexiang Duan; Jianjun Wu) \|\| ICES, Beijing Inf. S&T Univ., Beijing, China (Yazhe Gao)
Abstract	In initial random access, base station (BS) estimates the distance between the user equipment (UE) and BS. In the mobile satellite system (MSS), however, the characteristics of large transmission delay makes the estimation method used in the terrestrial system not applicable in the MSS. To solve this problem, a two-step time delay difference estimation scheme is proposed for orthogonal frequency division multiple access (OFDMA) multi-beam satellite system. We first divide a beam cell into some layered small sub-areas according to the different delay difference values. Then, two types of Physical Random Access Channel (PRACH) preamble burst format are performed: the first one is for the fractional delay difference value measurement and the second one is for the integer part. Further, complete criteria for the designation of PRACH parameters are proposed and closed-form expressions of the system performance are also derived, including the false alarm probability and the missed detection probability. Finally, according to the numerical analysis, the method shows good performance.
Sponsorship	IEEE Commun. Soc.
Starting Page	10
Ending Page	13
File Size	2954887
Page Count	4
File Format	PDF
e-ISBN	9788996865032
DOI	10.1109/ICACT.2014.6778912
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-02-16
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	Global IT Research Institute (GIRI)
Subject Keyword	Satellites Doppler shift Delays Delay effects Estimation Educational institutions OFDM doppler shift PRACH LTE satellite random access
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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