Joint Power Control and LSFD for Wireless-Powered Cell-Free Massive MIMO
==================
This is a code package is related to the following scientific article:
Özlem Tuğfe Demir and Emil Björnson, “[Joint Power Control and LSFD for Wireless-Powered Cell-Free Massive MIMO](https://ieeexplore.ieee.org/document/9258425
),” IEEE Transactions on Wireless Communications, vol. 20, no. 3, pp. 1756-1769, March 2021, doi: 10.1109/TWC.2020.3036281.
The package contains a simulation environment, based on Matlab, that reproduces some of the numerical results and figures in the article. We encourage you to also perform reproducible research!
## Abstract of Article
This paper considers wireless uplink information
and downlink power transfer in cell-free massive multiple-input
multiple-output systems. The single-antenna user equipments
(UEs) utilize the energy harvested in the downlink to transmit
uplink pilot and information signals to the multiple-antenna
access points (APs). We consider Rician fading and maximum
ratio processing based on either linear minimum mean-squared
error (LMMSE) or least-squares (LS) channel estimation. We
derive the average harvested energy by using a practical nonlinear
energy harvesting circuit model for both coherent and noncoherent
transmission schemes. Furthermore, the uplink spectral
efficiency (SE) is derived for all the considered methods and
the max-min fairness problem is cast where the optimization
variables are the AP and UE power control coefficients together
with the large-scale fading decoding vectors. The objective is to
maximize the minimum SE of the UEs’ under APs’ and UEs’
transmission power constraints. A novel alternating optimization
algorithm with guaranteed convergence and improvement at each
step is proposed to solve the highly-coupled non-convex problem.
## Content of Code Package
The article contains 12 simulation figures, numbered 2-13. Figures 2 and 3 are generated by the Matlab script Fig2_3.m. Figures 4, 5, 12, and 13 are generated by the Matlab script Fig4_5_12_13.m. Figures 6 and 7 are generated by the Matlab script Fig6_7.m. Figures 8, 9, 10, and 11 are generated respectively by the Matlab scripts Fig8.m, Fig9.m, Fig10.m, and Fig11.m. The package also contains the Matlab scripts functionExampleSetup.m, functionExpectations_lmmse.m, functionExpectations_lmmse_random_pilot_sequence.m, functionExpectations_ls.m, optimize_power_coh_lin.m, optimize_power_coh_nonlin.m, optimize_power_noncoh_lin.m, and optimize_power_noncoh_nonlin.m that are MATLAB functions used by some of the scripts.
For the optimization problems, the convex programming solver CVX http://cvxr.com/cvx/ is used. Please adjust the default solver of CVX to SDPT3 not to encounter any issues. The version we have tested was SDPT3 4.0.
See each file for further documentation.
## Acknowledgements
The work of Ö. T. Demir and E. Björnson was partially supported by ELLIIT and the Wallenberg AI, Autonomous Systems and Software Program (WASP) funded by the Knut and Alice Wallenberg Foundation.
## License and Referencing
This code package is licensed under the GPLv2 license. If you in any way use this code for research that results in publications, please cite our original article listed above.
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能量控制问题代码matlab-wireless-powered-cell-free:“无线通信无蜂窝大规模MIMO的联合功率控制...
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能量控制问题代码matlab 用于无线供电的无蜂窝大规模MIMO的联合功率控制和LSFD 这是与以下科学文章相关的代码包: ÖzlemTuğfeDemir和EmilBjörnson,“,”《 IEEE Transactions on Wireless Communications》,第1卷。 20号3,pp.1756-1769,2021年3月,doi:10.1109 / TWC.2020.3036281。 该软件包包含一个基于Matlab的仿真环境,该环境可复制本文中的一些数值结果和图形。 我们鼓励您也进行可重复的研究! 文章摘要 本文考虑了无单元大规模多输入多输出系统中的无线上行链路信息和下行链路功率传输。 单天线用户设备(UE)利用在下行链路中收集的能量向多天线接入点(AP)发送上行链路导频和信息信号。 我们考虑基于线性最小均方误差(LMMSE)或最小二乘(LS)信道估计的Rician衰落和最大比率处理。 我们通过对相干和非相干传输方案使用实用的非线性能量收集电路模型来得出平均收集的能量。 此外,针对所有考虑的方法得出上行链路频谱效率(SE),并在优化变量为AP和UE功率控制系数以
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wireless-powered-cell-free-main.zip (16个子文件)
wireless-powered-cell-free-main
Fig2_3.m 1KB
Fig4_5_12_13.m 10KB
optimize_power_coh_nonlin.m 6KB
Fig6_7.m 6KB
Fig10.m 4KB
functionExampleSetup.m 4KB
functionExpectations_lmmse_random_pilot_sequence.m 3KB
Fig8.m 4KB
README.md 3KB
Fig11.m 6KB
optimize_power_noncoh_nonlin.m 6KB
optimize_power_coh_lin.m 6KB
functionExpectations_ls.m 4KB
functionExpectations_lmmse.m 5KB
Fig9.m 4KB
optimize_power_noncoh_lin.m 6KB
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