Multimode coordinated multipoint transmission with nonideal timing synchronization

qi GUZhe; pei ZHANGZhong

doi:10.11959/j.issn.1000-436x.2016015

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Multimode coordinated multipoint transmission with nonideal timing synchronization

Academic paper | 更新时间：2024-06-05

- Multimode coordinated multipoint transmission with nonideal timing synchronization
- Journal on Communications Vol. 37, Issue 1, Pages: 130-141(2016)
- 作者机构：
  
  电子科技大学通信抗干扰技术国家级重点实验室，四川成都 611731
- 作者简介：
- 基金信息：
  
  The National Science and Technology Major Project(2012ZX03001027-001);The Na-tional Natural Science Foundation of China(61101092);The National High Technology Research and Development of China(863 Program)(2014AA01A704)
- DOI：10.11959/j.issn.1000-436x.2016015
  CLC： TN911.6
- Online First：2016-01，
  
  Published：25 January 2016
- 稿件说明：
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qi GUZhe, pei ZHANGZhong. Multimode coordinated multipoint transmission with nonideal timing synchronization[J]. Journal on Communications, 2016, 37(1): 130-141.
DOI：

qi GUZhe, pei ZHANGZhong. Multimode coordinated multipoint transmission with nonideal timing synchronization[J]. Journal on Communications, 2016, 37(1): 130-141. DOI： 10.11959/j.issn.1000-436x.2016015.

摘要

针对非理想定时同步对协作多点传输的负面影响，提出了多模协作多点传输算法。通过推导协作波束成形模式和联合处理模式在非理想定时同步条件下的平均可达速率，得到模式选择变量和模式选择门限。在多模协作多点传输算法中，用户首先对定时同步误差进行估计，并计算其模式选择变量和模式选择门限。然后用户选择协作多点传输的下行传输模式，并将其选择结果反馈给协作基站。最后，根据各用户的反馈，协作基站以最大化平均可达传输速率为准则，自适应地在协作波束成形模式和联合处理模式之间切换。仿真结果表明多模协作多点传输算法在定时同步误差较小时，采用联合处理模式，以保持空间复用增益，在定时同步误差较大时，采用协作波束成形模式，以避免用户间的额外干扰。因此，在非理想定时同步误差条件下，多模协作多点传输算法比仅采用协作波束成形模式或联合处理模式的传统协作多点传输算法具有更好的性能。

Abstract

Against the negative impact of non-ideal timing synchronization on the coordinated multipoint (CoMP) trans-mission

a multimode algorithm was proposed. According to the average achievable rates of the different CoMP transmis-sion modes under non-ideal timing synchronization condition

such as coordinated beamforming (CB) and joint processing (JP)

the mode selection variable and the mode selection threshold were acquired. In the multimode algorithm for CoMP transmission

user equipments (UE) estimate the timing synchronization errors

calculate the mode election va-riables and the mode selection thresholds firstly. After rds

UEs select the CoMP transmission mode

feedback the se-lection results to coordinated base stations (BS). Finall

According to the feedback from UEs

coordinated BSs switch the CoMP transmission mode between CB and JP adaptively to maximize the average achievable rate. Simulation results show that the multimode algorithm adopt JP to maintain spatial multiplexing gain when timing synchronization errors are small

adopt CB to avoid extra interference between UEs when timing synchronization errors are large. Therefore under

non-ideal timing synchronization condition the proposed multimode algorithm outperforms the traditional algorithms

which only adopt CB or JP for CoMP transmission.

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references

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