Downlink Power Optimization for Cell-Free Massive MIMO Over Spatially Correlated Rayleigh Fading Channels
Cell-free massive multiple-input multiple-output (mMIMO) is regarded as a promising technology in the future wireless communication. This paper aims to minimize the downlink power consumption of cell-free mMIMO system under the downlink rate constraints of users and the power constraints of per-ante...
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| Veröffentlicht in: | IEEE access 2020, Vol.8, p.56214-56227 |
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| creator | Qiu, Jiahua Xu, Kui Xia, Xiaochen Shen, Zhexian Xie, Wei |
| description | Cell-free massive multiple-input multiple-output (mMIMO) is regarded as a promising technology in the future wireless communication. This paper aims to minimize the downlink power consumption of cell-free mMIMO system under the downlink rate constraints of users and the power constraints of per-antenna over spatially correlated Rayleigh fading channels. Firstly, this paper studies the performance of two different downlink transmission modes: non-coherent joint transmission and coherent joint transmission. Then, for the two transmission modes, the corresponding downlink power optimization model is established and an efficient power optimization algorithm is proposed based on the Lagrange multiplier (LM) method. Under the power optimization model, this paper analyzes the impact of different factors on the downlink power consumption of cell-free mMIMO system. Simulation results show that coherent joint transmission performs better than non-coherent joint transmission on spectral efficiency (SE) and energy efficiency (EE). In addition, under the same power control strategy, the downlink power consumption of cell-free mMIMO is much lower than co-located mMIMO. Moreover, the total transmission power decreases when more antennas are utilized at each access point (AP) or spatial correlation of channels becomes weak. |
| doi_str_mv | 10.1109/ACCESS.2020.2981967 |
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This paper aims to minimize the downlink power consumption of cell-free mMIMO system under the downlink rate constraints of users and the power constraints of per-antenna over spatially correlated Rayleigh fading channels. Firstly, this paper studies the performance of two different downlink transmission modes: non-coherent joint transmission and coherent joint transmission. Then, for the two transmission modes, the corresponding downlink power optimization model is established and an efficient power optimization algorithm is proposed based on the Lagrange multiplier (LM) method. Under the power optimization model, this paper analyzes the impact of different factors on the downlink power consumption of cell-free mMIMO system. Simulation results show that coherent joint transmission performs better than non-coherent joint transmission on spectral efficiency (SE) and energy efficiency (EE). In addition, under the same power control strategy, the downlink power consumption of cell-free mMIMO is much lower than co-located mMIMO. Moreover, the total transmission power decreases when more antennas are utilized at each access point (AP) or spatial correlation of channels becomes weak.</description><identifier>ISSN: 2169-3536</identifier><identifier>EISSN: 2169-3536</identifier><identifier>DOI: 10.1109/ACCESS.2020.2981967</identifier><identifier>CODEN: IAECCG</identifier><language>eng</language><publisher>Piscataway: IEEE</publisher><subject>Algorithms ; Antennas ; Cell-free mMIMO ; Channels ; Coherence ; coherent joint transmission ; Correlation ; Downlink ; Downlinking ; energy efficiency ; Fading ; Fading channels ; Impact analysis ; Lagrange multiplier ; MIMO (control systems) ; non-coherent joint transmission ; Optimization ; Power consumption ; Power control ; Power demand ; power optimization and spatial correlation ; Wireless communications</subject><ispartof>IEEE access, 2020, Vol.8, p.56214-56227</ispartof><rights>Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c408t-6f26be508bdb6e2a65f2c702554590f420a7fc3efeea8a9f888e9ac11ee31c543</citedby><cites>FETCH-LOGICAL-c408t-6f26be508bdb6e2a65f2c702554590f420a7fc3efeea8a9f888e9ac11ee31c543</cites><orcidid>0000-0002-7079-1755 ; 0000-0002-9173-6499 ; 0000-0003-4830-8672 ; 0000-0003-4372-6971 ; 0000-0002-2186-4655</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/9042221$$EHTML$$P50$$Gieee$$Hfree_for_read</linktohtml><link.rule.ids>314,780,784,864,2102,4024,27633,27923,27924,27925,54933</link.rule.ids></links><search><creatorcontrib>Qiu, Jiahua</creatorcontrib><creatorcontrib>Xu, Kui</creatorcontrib><creatorcontrib>Xia, Xiaochen</creatorcontrib><creatorcontrib>Shen, Zhexian</creatorcontrib><creatorcontrib>Xie, Wei</creatorcontrib><title>Downlink Power Optimization for Cell-Free Massive MIMO Over Spatially Correlated Rayleigh Fading Channels</title><title>IEEE access</title><addtitle>Access</addtitle><description>Cell-free massive multiple-input multiple-output (mMIMO) is regarded as a promising technology in the future wireless communication. This paper aims to minimize the downlink power consumption of cell-free mMIMO system under the downlink rate constraints of users and the power constraints of per-antenna over spatially correlated Rayleigh fading channels. Firstly, this paper studies the performance of two different downlink transmission modes: non-coherent joint transmission and coherent joint transmission. Then, for the two transmission modes, the corresponding downlink power optimization model is established and an efficient power optimization algorithm is proposed based on the Lagrange multiplier (LM) method. Under the power optimization model, this paper analyzes the impact of different factors on the downlink power consumption of cell-free mMIMO system. Simulation results show that coherent joint transmission performs better than non-coherent joint transmission on spectral efficiency (SE) and energy efficiency (EE). In addition, under the same power control strategy, the downlink power consumption of cell-free mMIMO is much lower than co-located mMIMO. Moreover, the total transmission power decreases when more antennas are utilized at each access point (AP) or spatial correlation of channels becomes weak.</description><subject>Algorithms</subject><subject>Antennas</subject><subject>Cell-free mMIMO</subject><subject>Channels</subject><subject>Coherence</subject><subject>coherent joint transmission</subject><subject>Correlation</subject><subject>Downlink</subject><subject>Downlinking</subject><subject>energy efficiency</subject><subject>Fading</subject><subject>Fading channels</subject><subject>Impact analysis</subject><subject>Lagrange multiplier</subject><subject>MIMO (control systems)</subject><subject>non-coherent joint transmission</subject><subject>Optimization</subject><subject>Power consumption</subject><subject>Power control</subject><subject>Power demand</subject><subject>power optimization and spatial correlation</subject><subject>Wireless communications</subject><issn>2169-3536</issn><issn>2169-3536</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>ESBDL</sourceid><sourceid>RIE</sourceid><sourceid>DOA</sourceid><recordid>eNpNUV1v1DAQjBBIVKW_oC-WeM7h79iPVejBSa0OcfBsOc766sONDzttdfx6XFJV7MuuRjOzq52muSR4RQjWn676_nq3W1FM8YpqRbTs3jRnlEjdMsHk2__m981FKQdcS1VIdGdN-JyephimX-hbeoKMtsc53Ic_dg5pQj5l1EOM7ToDoFtbSnisfXO7RdvHSt4dK8_GeEJ9yhminWFE3-0pQtjfobUdw7RH_Z2dJojlQ_PO21jg4qWfNz_X1z_6r-3N9sumv7ppHcdqbqWncgCB1TAOEqiVwlPXYSoEFxp7TrHtvGPgAayy2iulQFtHCAAjTnB23mwW3zHZgznmcG_zySQbzD8g5b2xeQ4ugoGxigUbsJOeE27VIBzpuPRYKuq8qF4fF69jTr8foMzmkB7yVM83lNd_SqaVqiy2sFxOpWTwr1sJNs8RmSUi8xyReYmoqi4XVQCAV4XGnFJK2F-5EI0e</recordid><startdate>2020</startdate><enddate>2020</enddate><creator>Qiu, Jiahua</creator><creator>Xu, Kui</creator><creator>Xia, Xiaochen</creator><creator>Shen, Zhexian</creator><creator>Xie, Wei</creator><general>IEEE</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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This paper aims to minimize the downlink power consumption of cell-free mMIMO system under the downlink rate constraints of users and the power constraints of per-antenna over spatially correlated Rayleigh fading channels. Firstly, this paper studies the performance of two different downlink transmission modes: non-coherent joint transmission and coherent joint transmission. Then, for the two transmission modes, the corresponding downlink power optimization model is established and an efficient power optimization algorithm is proposed based on the Lagrange multiplier (LM) method. Under the power optimization model, this paper analyzes the impact of different factors on the downlink power consumption of cell-free mMIMO system. Simulation results show that coherent joint transmission performs better than non-coherent joint transmission on spectral efficiency (SE) and energy efficiency (EE). 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| subjects | Algorithms Antennas Cell-free mMIMO Channels Coherence coherent joint transmission Correlation Downlink Downlinking energy efficiency Fading Fading channels Impact analysis Lagrange multiplier MIMO (control systems) non-coherent joint transmission Optimization Power consumption Power control Power demand power optimization and spatial correlation Wireless communications |
| title | Downlink Power Optimization for Cell-Free Massive MIMO Over Spatially Correlated Rayleigh Fading Channels |
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