上行SCMA信道估计及性能评估

胡显安; 曾祥念

doi:10.11959/j.issn.1000-0801.2017267

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上行SCMA信道估计及性能评估

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- 上行SCMA信道估计及性能评估
- Channel estimation and performance analysis for uplink SCMA system
- 电信科学 2017年33卷第11期页码：169-178
- 作者机构：
- 作者简介：
  
  [ "胡显安（1990-），女，上海诺基亚贝尔股份有限公司算法工程师，主要研究方向为5G新型多址技术。" ]
  [ "曾祥念（1976-），女，博士，上海诺基亚贝尔股份有限公司系统工程师，主要研究方向为LTE、Turbo均衡器、SCMA、LDPC。" ]
- 基金信息：
  
  国家科技重大专项基金资助项目;The National Science and Technology Major Project of China(2016ZX03001018)
- DOI：10.11959/j.issn.1000-0801.2017267
  中图分类号： TP393
- 网络出版日期：2017-11，
  
  纸质出版日期：2017-11-20
- 稿件说明：
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胡显安, 曾祥念. 上行SCMA信道估计及性能评估[J]. 电信科学, 2017,33(11):169-178.

Xian’an HU, Xiangnian ZENG. Channel estimation and performance analysis for uplink SCMA system[J]. Telecommunications science, 2017, 33(11): 169-178.
胡显安, 曾祥念. 上行SCMA信道估计及性能评估[J]. 电信科学, 2017,33(11):169-178. DOI： 10.11959/j.issn.1000-0801.2017267.

Xian’an HU, Xiangnian ZENG. Channel estimation and performance analysis for uplink SCMA system[J]. Telecommunications science, 2017, 33(11): 169-178. DOI： 10.11959/j.issn.1000-0801.2017267.

摘要

针对两种SCMA资源映射方式（RE-Sparse SCMA和RB-Sparse SCMA）和已有的基于ZC序列循环移位正交性和正交覆盖码的导频图样方案，提出了基于频分复用的稀疏导频图样，并且在具有不同频率选择性的信道下进行了仿真评估，同时对SCMA的SIC-MPA接收算法提出了目标用户选择策略。从仿真结果可以看出，在慢衰落信道前提下，正交覆盖码和频分复用都可以明显提升信道估计性能，RB-Sparse SCMA 与RE-Sparse SCMA相比，导频图样本身有一定的频域正交性，且性能更好，因此能更灵活地适用于实际多用户传输场景。

Abstract

There are two types of physical mapping for SCMA named RE-Sparse SCMA and RB-Sparse SCMA.A frequency division multiplexing (FDM) based pilot pattern was proposed for RE-Sparse SCMA

and existing code division multiplexing pilot patterns based on cyclic shift and orthogonal cover code (OCC) were considered.Under different frequency selective channels

simulation and evaluation work for the two mapping schemes of SCMA had done.Besides

a target user selection strategy was proposed for existing SIC-MPA.Analytical simulation results show that both OCC and FDM can improve system performance with slot fading channel.Compared with RE-Sparse SCMA

RB-Sparse SCMA with partially frequency orthogonal pilot pattern enjoys better performance gain

and it is more applicable for realistic multi-user SCMA scenario.

关键词

Keywords

references

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