多通道并行TD-LTE小区搜索架构设计与FPGA实现

发布时间：2018-05-16 01:09

本文选题：时分长期演进(TD-LTE)系统 + 小区搜索　；参考：《重庆邮电大学学报(自然科学版)》2017年04期

【摘要】：移动终端通过小区搜索完成与网络的接入工作。为了更快地完成时分长期演进(time division long term evolution,TD-LTE)系统小区搜索过程,与传统数字信号处理(digital signal processing,DSP)串行模式对比,从速度和面积两方面综合考虑,提出一种基于现场可编程门阵列(field programmable gate array,FPGA)的多通道并行小区搜索架构。主要工作集中在小区搜索整体方案设计和FPGA硬件实现上,在算法上对整个小区搜索算法架构进行了改进,同时根据硬件需求,利用以时钟换取速度的思想对FPGA硬件实现架构进行了优化。采用多通道并行高速乘法器进行序列相关检测和动态门限配置的方法,大大缩短了TD-LTE小区搜索的处理时间。并以Altera的EP4SGX230KF40C2芯片作为硬件平台进行了Modelsim功能仿真、板级验证等工作。实验结果表明,该设计方案的处理速度和数据精度均满足TD-LTE系统测试要求,性能远优于传统的DSP架构模式,可以应用到实际工程中。
[Abstract]:The mobile terminal completes the access work with the network through the cell search. In order to complete the cell search process of TD-LTE system more quickly, compared with the traditional serial mode of digital signal processing, the speed and area of TD-LTEs system are considered synthetically. A multi-channel parallel cell search architecture based on field programmable gate array (FPGA) is proposed. The main work is focused on the whole project design of cell search and the implementation of FPGA hardware. In the algorithm, the whole cell search algorithm architecture is improved, and according to the hardware requirements, The hardware architecture of FPGA is optimized by using the idea of clock for speed. The multichannel parallel high speed multiplier is used to detect the sequence correlation and configure the dynamic threshold, which greatly reduces the processing time of TD-LTE cell search. The EP4SGX230KF40C2 chip of Altera is used as the hardware platform to simulate and verify the Modelsim function. The experimental results show that both the processing speed and the data precision of the design scheme can meet the test requirements of TD-LTE system, and the performance of the design scheme is much better than that of the traditional DSP architecture mode, and can be applied to practical engineering.
【作者单位】：重庆邮电大学重庆市移动通信技术重点实验室;
【基金】：国家自然科学基金(61301126) 重庆市基础与前沿研究计划项目(cstc2013jcyj A40032) 重庆邮电大学博士启动基金(A2012-33);重庆邮电大学青年科学研究项目(A2013-31)~~
【分类号】：TN791;TN929.5

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