Graduate School and Research Center in Digital Sciences

Precoder feedback versus channel feedback in massive MIMO under user cooperation

Chen, Junting; Yin, Haifan; Cottatellucci, Laura; Gesbert, David

ASILOMAR 2015, 49th Asilomar Conference on Signals, Systems, and Computers, November 8-11, 2015, Pacific Grove, CA, USA

In multiuser massive MIMO systems, it is not clear whether users should feed back the channel or the precoder when they can exchange the channel state information (CSI). This paper compares the precoder feedback scheme with the channel feedback scheme. It is found that when there are sufficient number of bits for CSI exchange, the precoder feedback scheme can reduce the interference leakage to 1/(K −1) of the channel feedback scheme, where K is the number of users. Moreover, the interference leakage under the precoder feedback scheme decreases faster than the channel feedback scheme when the number of feedback bits increases.

Document Doi Bibtex

Title:Precoder feedback versus channel feedback in massive MIMO under user cooperation
Type:Invited paper in a conference
City:Pacific Grove
Department:Communication systems
Eurecom ref:4771
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Bibtex: @inproceedings{EURECOM+4771, doi = {}, year = {2015}, title = {{P}recoder feedback versus channel feedback in massive {MIMO} under user cooperation}, author = {{C}hen, {J}unting and {Y}in, {H}aifan and {C}ottatellucci, {L}aura and {G}esbert, {D}avid}, booktitle = {{ASILOMAR} 2015, 49th {A}silomar {C}onference on {S}ignals, {S}ystems, and {C}omputers, {N}ovember 8-11, 2015, {P}acific {G}rove, {CA}, {USA}}, address = {{P}acific {G}rove, {UNITED} {STATES}}, month = {11}, url = {} }
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