Spectral-Energy Efficiency Tradeoff in Relay-Aided Massive MIMO Cellular Networks With Pilot Contamination
This paper concerns with a relay-aided massive multiple input multiple output (MIMO) cellular network. The exact closed-form expressions of both spectral efficiency (SE) and energy efficiency (EE) are obtained for downlink single-cell multi-user multi-relay massive MIMO transmission in the pilot-con...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2016-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/7523887/ |
| _version_ | 1818927893318729728 |
|---|---|
| author | Jing Chen Hongbin Chen Han Zhang Feng Zhao |
| author_facet | Jing Chen Hongbin Chen Han Zhang Feng Zhao |
| author_sort | Jing Chen |
| collection | DOAJ |
| description | This paper concerns with a relay-aided massive multiple input multiple output (MIMO) cellular network. The exact closed-form expressions of both spectral efficiency (SE) and energy efficiency (EE) are obtained for downlink single-cell multi-user multi-relay massive MIMO transmission in the pilot-contaminated regime, where the number of users is larger than the pilot sequence length. Based on the theoretical results of SE and EE, we investigate the effects of some system parameters [such as number of antennas at the base station (BS), transmit power at the BS, and transmit power of each relay station (RS)] on system performance, and achieve the tradeoff between SE and EE by power control. Specifically, the tradeoff problem is solved by joint optimization over transmit power P of the BS and transmit power p<sub>r</sub> of each RS, so as to maximize EE while satisfying the SE requirement. With the proposition that EE function is strictly quasi-concave with either P or p<sub>r</sub>, we propose two optimization methods: 1-D searching and alternate optimization. Comparatively, the former achieves a better performance, while the latter has a lower complexity. Simulation results validate the effectiveness of the two methods. |
| first_indexed | 2024-12-20T03:20:15Z |
| format | Article |
| id | doaj.art-a817e08f02f44ed787818c778922093f |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-20T03:20:15Z |
| publishDate | 2016-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-a817e08f02f44ed787818c778922093f2022-12-21T19:55:14ZengIEEEIEEE Access2169-35362016-01-0145234524210.1109/ACCESS.2016.25952587523887Spectral-Energy Efficiency Tradeoff in Relay-Aided Massive MIMO Cellular Networks With Pilot ContaminationJing Chen0Hongbin Chen1https://orcid.org/0000-0003-4008-3704Han Zhang2Feng Zhao3Key Laboratory of Cognitive Radio and Information Processing, Guilin University of Electronic Technology, Guilin, ChinaKey Laboratory of Cognitive Radio and Information Processing, Guilin University of Electronic Technology, Guilin, ChinaSchool of Physics and Telecommunication Engineering, South China Normal University, Guangzhou, ChinaKey Laboratory of Cognitive Radio and Information Processing, Guilin University of Electronic Technology, Guilin, ChinaThis paper concerns with a relay-aided massive multiple input multiple output (MIMO) cellular network. The exact closed-form expressions of both spectral efficiency (SE) and energy efficiency (EE) are obtained for downlink single-cell multi-user multi-relay massive MIMO transmission in the pilot-contaminated regime, where the number of users is larger than the pilot sequence length. Based on the theoretical results of SE and EE, we investigate the effects of some system parameters [such as number of antennas at the base station (BS), transmit power at the BS, and transmit power of each relay station (RS)] on system performance, and achieve the tradeoff between SE and EE by power control. Specifically, the tradeoff problem is solved by joint optimization over transmit power P of the BS and transmit power p<sub>r</sub> of each RS, so as to maximize EE while satisfying the SE requirement. With the proposition that EE function is strictly quasi-concave with either P or p<sub>r</sub>, we propose two optimization methods: 1-D searching and alternate optimization. Comparatively, the former achieves a better performance, while the latter has a lower complexity. Simulation results validate the effectiveness of the two methods.https://ieeexplore.ieee.org/document/7523887/Cellular networksrelaymassive MIMOspectral efficiencyenergy efficiency |
| spellingShingle | Jing Chen Hongbin Chen Han Zhang Feng Zhao Spectral-Energy Efficiency Tradeoff in Relay-Aided Massive MIMO Cellular Networks With Pilot Contamination IEEE Access Cellular networks relay massive MIMO spectral efficiency energy efficiency |
| title | Spectral-Energy Efficiency Tradeoff in Relay-Aided Massive MIMO Cellular Networks With Pilot Contamination |
| title_full | Spectral-Energy Efficiency Tradeoff in Relay-Aided Massive MIMO Cellular Networks With Pilot Contamination |
| title_fullStr | Spectral-Energy Efficiency Tradeoff in Relay-Aided Massive MIMO Cellular Networks With Pilot Contamination |
| title_full_unstemmed | Spectral-Energy Efficiency Tradeoff in Relay-Aided Massive MIMO Cellular Networks With Pilot Contamination |
| title_short | Spectral-Energy Efficiency Tradeoff in Relay-Aided Massive MIMO Cellular Networks With Pilot Contamination |
| title_sort | spectral energy efficiency tradeoff in relay aided massive mimo cellular networks with pilot contamination |
| topic | Cellular networks relay massive MIMO spectral efficiency energy efficiency |
| url | https://ieeexplore.ieee.org/document/7523887/ |
| work_keys_str_mv | AT jingchen spectralenergyefficiencytradeoffinrelayaidedmassivemimocellularnetworkswithpilotcontamination AT hongbinchen spectralenergyefficiencytradeoffinrelayaidedmassivemimocellularnetworkswithpilotcontamination AT hanzhang spectralenergyefficiencytradeoffinrelayaidedmassivemimocellularnetworkswithpilotcontamination AT fengzhao spectralenergyefficiencytradeoffinrelayaidedmassivemimocellularnetworkswithpilotcontamination |