【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。更多还原

【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).更多还原