Generation Method of Random Access Signal  in Long-term Evolution System

doi:10.3969/j.issn.1000-3428.2011.13.028

Computer Engineering ›› 2011, Vol. 37 ›› Issue (13): 89-91,94. doi: 10.3969/j.issn.1000-3428.2011.13.028

• Networks and Communications • Previous Articles Next Articles

Generation Method of Random Access Signal in Long-term Evolution System

LEI Shu-pei ^1,2,3, XIONG Yong ^1,2,3, YANG Xiu-mei ^1,2,3

(1. Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China; 2. Shanghai Research Center for Wireless Communications, Shanghai 200335, China; 3. Key Laboratory of Wireless Sensor Network & Communications, Chinese Academy of Sciences, Shanghai 200335, China)

Received:2010-12-08 Online:2011-07-05 Published:2011-07-05

长期演进系统中随机接入信号的产生方法

雷舒培^1,2,3，熊勇^1,2,3，杨秀梅^1,2,3

(1. 中国科学院上海微系统与信息技术研究所，上海 200050；2. 上海无线通信研究中心，上海 200335； 3. 中国科学院无线传感网与通信重点实验室，上海 200335)

作者简介:雷舒培(1986－)，男，硕士研究生，主研方向：信号处理，多天线技术，反馈信道；熊勇，研究员、博士；杨秀梅，助理研究员、博士研究生
基金资助:
国际科技合作基金资助项目“接入技术：多用户多天线广义频分多接入技术”(2008DFA11700)，“未来无线网络组网与核心网研究、开发与合作”(S2010GR0902)；国家科技重大专项基金资助项目“IMT-A新型无线资源管理研究及验证”(2009ZX03003-007- 03)；上海市自然科学基金资助项目“蜂窝系统中的协同调度技术”(09ZR1430500)；上海市重大科技专题攻关专项基金资助项目“TD- LTE示范实验网规划与性能测试”(09dz1500102)

Abstract

Abstract: This paper studies a generation method of Random Access(RA) signal in physical layer of the Long-Term Evolution(LTE) system. Based on the key technical characteristics of random access, including Zadoff-Chu(ZC) sequences, SC-FDMA principles and baseband signal generation, it proposes to use a practical method to generate RA signal by using up-sampling and Low-Pass Filtering(LPF). Complexity analysis shows that this method can greatly decrease the complexity in signal generation, which is very valuable in engineering practice. Simulation results show that the signal generated by this method is very close to the signal generated using direct theoretical Inverse Fast Fourier Transform(IFFT).

Key words: 长期演进系统, 随机接入信号, ZC序列, 快速反傅里叶变换

摘要： 提出一种适用于长期演进系统的物理层随机接入信号产生方法。基于ZC序列、SC-FDMA原理和基带信号产生等随机接入的主要技术，利用基于上采样和低通滤波的实用方法产生随机接入信号。复杂度分析和仿真结果表明，该方法能够降低信号产生的复杂度，其产生的信号与直接使用快速反傅里叶变换产生的信号非常接近，可以直接应用于实际系统。

关键词: 长期演进系统, 随机接入信号, ZC序列, 快速反傅里叶变换

CLC Number:

TP393

LEI Shu-Pei, XIONG Yong, YANG Xiu-Mei. Generation Method of Random Access Signal in Long-term Evolution System[J]. Computer Engineering, 2011, 37(13): 89-91,94.

雷舒培, 熊勇, 杨秀梅. 长期演进系统中随机接入信号的产生方法[J]. 计算机工程, 2011, 37(13): 89-91,94.

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