超高速移动下随机接入前导检测算法的分析与仿真
Analysis and simulation of random access preamble detection algorithm in the super-high speed scene
  
DOI:
中文关键词:  5G;随机接入;前导;多普勒频偏;双门限
英文关键词:5G;random access;preamble;Doppler frequency shift;dual-threshold
基金项目:重点产业共性关键技术创新(cstc2017zdcy-zdzxX0004)资助项目
作者单位
陈发堂 重庆邮电大学 通信与信息工程学院,重庆400065 
曾勤 重庆邮电大学 通信与信息工程学院,重庆400065 
骆维扬 重庆邮电大学 通信与信息工程学院,重庆400065 
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中文摘要:
      针对多普勒频移导致功率分散的问题,提出一种五窗口检测技术与双门限技术相结合的联合检测方法,规避了超高速场景下多普勒频偏带来的接收端相关峰值的能量泄漏的影响,提高了检测质量。文中算法能够保证在虚警概率满足3GPP协议要求的情况下,对接收端的随机接入前导进行检测,降低了漏检概率,提高了检测成功率。仿真结果表明,在超高速移动场景下,最大多普勒频偏为1 960 Hz的情况下,随机接入前导通过加性高斯白噪声(Additive White Gaussian Noise,AWGN)信道传输,基站侧漏检概率相比已有算法性能提升了1 dB,通过扩展典型城市(Extended Typical Urban,ETU)模型信道传输,基站侧漏检概率相比已有算法性能提升了0.7 dB,同时也有效地降低了虚警概率,能够较好地检测出随机接入前导序列。
英文摘要:
      According to the characteristics of power dispersion caused by Doppler frequency shift,a joint detection method for a five-window detection technology and a dual-threshold technology are adopted, avoiding the influence of the energy leakage on a correlation peak of a receiver caused by Doppler frequency offset in the super-high speed scene and improving the detection quality.The algorithm can ensure that when the false alarm probability meets the requirements of 3GPP protocol,it can detect the random access preamble to the receiver,and reduce the missed detection probability and improve the detection success rate.The simulation results show that in the super-high speed scene,when the maximum Doppler frequency offset is 1 960 Hz,the probability of the missed detection on the base station side is improved by 1 dB compared with the existing algorithms by additive white Gaussian noise (AWGN) channel,and the probability of the missed detection on the base station side is improved by 0.7 dB compared with the existing algorithms by extended typical urban (ETU) model channel.Meanwhile,it can also effectively reduce the false alarm probability and detect the random access preamble sequence better.
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