NDLI: A fast automatic gain control scheme for initial cell search in 3GPP LTE TDD system

Content Provider	IEEE Xplore Digital Library
Author	Jun-Hee Jang Hyung-Jin Choi
Copyright Year	2011
Description	Author affiliation: School of Information and Communication Engineering, Sungkyunkwan University, Korea (Jun-Hee Jang; Hyung-Jin Choi)
Abstract	In this paper, we propose a fast automatic gain control (AGC) scheme for initial cell search in long term evolution (LTE) time division duplex (TDD) system. Since the received signal has a large signal power difference between uplink and downlink in TDD systems, conventional AGC scheme leads to increased AGC gain variation and the received signal will be attenuated. In order to overcome this problem, we propose a modified AGC scheme based on the average amplitude ratio calculation which can not only effectively increase convergence speed of the AGC gain but also maintain the stability of AGC operation. Also, it is important for AGC to converge efficiently for the accurate radio frame timing detection during the subsequent initial cell search procedure. Therefore, we also consider the proposed AGC scheme in combination with primary synchronization signal (PSS) detection interface. By using extensive computer simulation in the presence of frequency offset and various channel environments, we show that the proposed method can obtain a good behavior in terms of convergence speed and PSS detection performance in LTE TDD system and verify that it is attractive and suitable for implementation with stable operation.
Starting Page	833
Ending Page	838
File Size	305952
Page Count	6
File Format	PDF
ISBN	9781424488308
ISSN	17389445
e-ISBN	9788955191554
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-02-13
Publisher Place	Korea (South)
Access Restriction	Subscribed
Rights Holder	Global IT Research Inst
Subject Keyword	Gain Downlink Convergence Transmitters Transient analysis Gain control Silicon initial cell search AGC LTE FDD TDD
Content Type	Text
Resource Type	Article

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