计算机应用 ›› 2018, Vol. 38 ›› Issue (10): 2945-2949.DOI: 10.11772/j.issn.1001-9081.2018030518

• 网络与通信 • 上一篇    下一篇

LTE-A空口监测分析仪中PDSCH解资源映射的设计与实现

王美乐1, 张治中1,2, 王光亚1,2   

  1. 1. 重庆邮电大学 通信网与测试技术重点实验室, 重庆 400065;
    2. 重庆重邮汇测通信技术有限公司, 重庆 401121
  • 收稿日期:2018-03-14 修回日期:2018-05-08 出版日期:2018-10-10 发布日期:2018-10-13
  • 通讯作者: 王美乐
  • 作者简介:王美乐(1993-),女,安徽淮北人,硕士研究生,主要研究方向:宽带通信网测试;张治中(1972-),男,湖北恩施人,教授,博士,博士生导师,主要研究方向:5G移动通信系统、通信网测试、宽带信息网络;王光亚(1994-),男,安徽滁州人,硕士研究生,主要研究方向:宽带通信网测试。
  • 基金资助:
    国家科技重大专项(2015ZX03001013);重庆高校创新团队项目(KJTD201312)。

Design and implementation of PDSCH de-resource mapping in LTE-A air interface analyzer

WANG Meile1, ZHANG Zhizhong1,2, WANG Guangya1,2   

  1. 1. The Key Laboratory of Communication Networks and Test Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
    2. Chongyou Huice Communications Technology Company Limited, Chongqing 401121, China
  • Received:2018-03-14 Revised:2018-05-08 Online:2018-10-10 Published:2018-10-13
  • Supported by:
    This work is partially supported by the National Science and Technology Major Project (2015ZX03001013), the Innovation Team Building Program of Colleges and Universities in Chongqing (KJTD201312).

摘要: 针对增强型长期演进(LTE-A)物理层传统解资源映射方法中重复计算资源映射位置造成的计算量冗余问题,提出一种新型架构的物理下行共享信道(PDSCH)解资源映射方法,为LTE-A空口监测分析仪相关物理层处理提供支持。首先,在物理层下行信号和信道解资源映射之前,产生单天线端口0模式、发射分集模式、单流波束赋形以及双流波束赋形下各个信号和信道的资源索引;然后,在物理层解资源映射时根据资源索引直接定位各信号和信道资源的时频位置;最后,把PDSCH信道解资源映射模块放在整个LTE-A链路级仿真平台中,给出四种传输模式下的仿真,得出不同传输模式下的误码率以及吞吐量的对比图,为最终的硬件实现提供理论参考。同时通过与传统架构下的解资源映射模块进行对比表明,该新型架构下的解资源映射模块比传统架构下的解资源映射仿真所花费的时间减少了33.33%,降低了解资源映射时的运算量和设备资源消耗。

关键词: 增强型长期演进, 空口, 监测分析仪, 物理下行共享信道, 解资源映射

Abstract: In view of the problem of computational redundancy due to the repeated computation of resource mapping positions in the traditional de-resource mapping method of Long Term Evolution-Advanced (LTE-A) physical layer, a new architecture of Physical Downlink Shared channel (PDSCH) de-resource mapping method was proposed, which provides support for the related physical layer processing of the LTE-A air interface analyzer. Firstly, before to the mapping of the physical downlink signal and the channel de-resource, the resource indexes of each signal and channel in single antenna port 0 mode, transmit diversity mode, single-stream beamforming, and dual-stream beamforming were generated; and then, the time-frequency location of the resource was directly located according to the resource index; finally, the PDSCH de-resource mapping module was put in the entire LTE-A link level simulation platform, and the simulations were given in four transmission modes, and the corresponding bit error rate and throughput comparison chart was obtained, which provides a theoretical reference to final hardware implementation. At the same time, compared with the de-resource mapping module under the traditional architecture, it shows that the de-resource mapping module under the new architecture costs 33.33% less time than the traditional computation mapping simulation, which reduces the de-resources and device resource consumption when de-resources mapping.

Key words: Long Term Evolution-Advanced (LTE-A), air interface, analyzer, Physical Downlink Shared CHannel (PDSCH), de-resource mapping

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