Study on adaptive modulation in D2D communications over Nakagami-m fading channel

Xiaoping ZENG; Haiwei MAO; Fan YANG; Xin JIAN; Shiqi LI; Xin JIANG; Wei FANG

doi:10.11959/j.issn.1000-436x.2018151

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Study on adaptive modulation in D2D communications over Nakagami-m fading channel

5G and Cognitive and Cooperative Network | 更新时间：2024-06-05

- Study on adaptive modulation in D2D communications over Nakagami-m fading channel
- Journal on Communications Vol. 39, Issue 9, Pages: 31-42(2018)
- 作者机构：
  
  1. 重庆大学通信工程学院，重庆 400044
  2. 重庆理工大学电气与电子工程学院，重庆 400054
  3. 北京民用飞机技术研究中心，北京 102211
- 作者简介：
- 基金信息：
  
  The National Natural Science Foundation of China(61501065);The National Natural Science Foundation of China(61571069);The National Natural Science Foundation of China(61701054);The National Natural Science Foundation of China(61601067);Chongqing Research Program of Basic Research and Frontier Technology(cstc2016jcyjA0021);Fundamental Research Funds for the Central Universities(106112017CDJQJ168817);Fundamental Research Funds for the Central Universities(2018CDXYTX0009);Fundamental Research Funds for the Central Universities(2018CDYJSY0055)
- DOI：10.11959/j.issn.1000-436x.2018151
  CLC： TN929.5
- Online First：2018-09，
  
  Published：25 September 2018
- 稿件说明：
移动端阅览
Xiaoping ZENG, Haiwei MAO, Fan YANG, et al. Study on adaptive modulation in D2D communications over Nakagami-m fading channel[J]. Journal on Communications, 2018, 39(9): 31-42.
DOI：

Xiaoping ZENG, Haiwei MAO, Fan YANG, et al. Study on adaptive modulation in D2D communications over Nakagami-m fading channel[J]. Journal on Communications, 2018, 39(9): 31-42. DOI： 10.11959/j.issn.1000-436x.2018151.

摘要

针对Nakagami-m衰落信道中，D2D（device to device）通信频谱利用率低的问题，设计一种基于非数据辅助误差矢量幅度（NDA-EVM

nondata-aided error vector magnitude）的自适应调制算法。以NDA-EVM作为信道质量评估参量，根据最大似然准则建立NDA-EVM与误码率（SER

symbol error ratio）的定量关系，据此设计SER约束下的MQAM调制方式切换机制；结合有限状态马尔可夫信道模型以及数据缓存处理，分析系统的分组丢失性能和频谱利用率。理论分析和仿真实验表明，基于NDA-EVM的自适应调制算法在不同调制方式的阈值下的准确性，明确系统QoS与分组丢失率的关系；在保持低算法复杂度的同时，提高了系统频谱利用率，对比传统算法，频谱利用率提升了0.752 bit·(s·Hz)

-1

。

Abstract

A novel adaptive modulation based on nondata-aided error vector magnitude (NDA-EVM) was proposed to solve the problem of lower spectral efficiency in device to device (D2D) communication over Nakagami-m fading channel.The NDA-EVM was used to evaluate the channel quality.The relationship between NDA-EVM and symbol error ratio (SER) was derived according to the maximum likelihood method.Thereafter

the adaptive modulation mechanism of MQAM with the SER constraint was designed.Considering the joint effect of finite-length queuing and fading channel

the system packet loss rate and spectral efficiency was analyzed.Theoretical analysis and simulation experiments show that NDA-EVM based adaptive modulation accurately gives the modulation threshold and evaluates the relationship between QoS and packet loss rate

the proposed algorithm improves system spectral efficiency while maintaining low algorithm complexity

spectral efficiency improves by 0.752 bit·(s·Hz)

-1

compared with traditional algorithm.

关键词

Keywords

references

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