ITM Web Conf.
Volume 11, 20172017 International Conference on Information Science and Technology (IST 2017)
|Number of page(s)||7|
|Section||Session III: Network and Communication|
|Published online||23 May 2017|
Random Access Preamble Generation with Low Storage for LTE Networks
1 State Power Economic Research Institute, Beijing 100052, China
2 University of Electronic Science and Technology of China, Chengdu, China
3 State Power Economic Research Institute, Beijing 100052, China
Long Term Evolution (LTE) random access preambles are generated from cyclically shifted Zadoff-Chu(ZC) sequences of prime length by using so-called Discrete Fourier Transformation-Spread-Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) modulation. In this paper we propose a novel preamble generation to reduce the storage and complexity of cyclically shifted ZC sequences’ Discrete Fourier Transformation (DFT). The proposed preamble generation allows the DFT of cyclically shifted ZC sequences to rely only on several constant factors and the elements of non-cyclically shifted ZC sequences which have already been generated. This preamble generation merely requires the storage of several constant factors, while avoids large storage and complex computation of complex exponential function.
© Owned by the authors, published by EDP Sciences, 2017
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