Random access preamble design based on time pre-compensation for LTE-satellite system

doi:10.1016/S1005-8885(15)60654-9

中国邮电高校学报(英文) ›› 2015, Vol. 22 ›› Issue (3): 64-73.doi: 10.1016/S1005-8885(15)60654-9

Random access preamble design based on time pre-compensation for LTE-satellite system

He Yizhou(1,2),Cui Gaofeng(1), Li Pengxu(1), Chang Ruijun(1), Wang Weidong(1)

1. Beijing University of Posts and Telecommunications, 2. Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory

收稿日期:2014-12-17 修回日期:2015-03-26 出版日期:2015-06-30 发布日期:2015-06-24
通讯作者: He Yizhou, E-mail: wangjianbupt@163.com E-mail:wangjianbupt@163.com
基金资助:
the Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory (ITD-U13007/KX132600014), the National Natural Science Foundation of China (91438114) and the Fundamental Research Funds for the Central Universities (2014RC0202).

Random access preamble design based on time pre-compensation for LTE-satellite system

He Yizhou(1,2),Cui Gaofeng(1), Li Pengxu(1), Chang Ruijun(1), Wang Weidong(1)

1. Beijing University of Posts and Telecommunications, 2. Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory

Received:2014-12-17 Revised:2015-03-26 Online:2015-06-30 Published:2015-06-24
Contact: He Yizhou, E-mail: wangjianbupt@163.com E-mail:wangjianbupt@163.com
Supported by:
the Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory (ITD-U13007/KX132600014), the National Natural Science Foundation of China (91438114) and the Fundamental Research Funds for the Central Universities (2014RC0202).

摘要/Abstract

摘要： Because of the integration of long term evolution (LTE) technology and mobile satellite communication systems, uplink access technology for LTE-based geo-stationary earth orbit (GEO) satellite has become a popular research topic for satellite system. In order to solve the problem of unreasonable design for physical random access channel (PRACH) signal structure and reduce the effect of time uncertainty, this paper proposes a novel random access preamble based on time pre-compensation (TPC) for LTE-Satellite (LTE-S) system. In this scheme, by applying the method of non-linear least squares, the user terminal (UT) can use the receiving power to estimate the communication round trip delay (RTD) and based on the transmission delay of the beam center and the satellite, RTD can be compensated before transmission. Therefore, the preamble length and duration can be reduced without related to the maximum of RTD. In order to verify the performance of the scheme, the MATLAB is used to build a test system. The simulation results show that the proposed preamble satisfies the requirements of LTE-S system, and the better performance than previous researches is obtained.

关键词: mobile satellite communication, long term evolution (LTE)-Satellite, random access, pre-compensation

Abstract: Because of the integration of long term evolution (LTE) technology and mobile satellite communication systems, uplink access technology for LTE-based geo-stationary earth orbit (GEO) satellite has become a popular research topic for satellite system. In order to solve the problem of unreasonable design for physical random access channel (PRACH) signal structure and reduce the effect of time uncertainty, this paper proposes a novel random access preamble based on time pre-compensation (TPC) for LTE-Satellite (LTE-S) system. In this scheme, by applying the method of non-linear least squares, the user terminal (UT) can use the receiving power to estimate the communication round trip delay (RTD) and based on the transmission delay of the beam center and the satellite, RTD can be compensated before transmission. Therefore, the preamble length and duration can be reduced without related to the maximum of RTD. In order to verify the performance of the scheme, the MATLAB is used to build a test system. The simulation results show that the proposed preamble satisfies the requirements of LTE-S system, and the better performance than previous researches is obtained.

Key words: mobile satellite communication, long term evolution (LTE)-Satellite, random access, pre-compensation

He Yizhou(1,2),Cui Gaofeng(1), Li Pengxu(1), Chang Ruijun(1), Wang Weidong(1). Random access preamble design based on time pre-compensation for LTE-satellite system[J]. Acta Metallurgica Sinica(English letters), 2015, 22(3): 64-73.

参考文献

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Random access preamble design based on time pre-compensation for LTE-satellite system

Random access preamble design based on time pre-compensation for LTE-satellite system

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