User selection in the MIMO BC
EUSIPCO 2012, 20th European Signal Processing Conference, August 27-31, 2012, Bucharest, Romania
It is well-known that user selection not only leads to multiuser diversity but also to decreased suboptimality of simple beamforming (BF) techniques compared to optimal Dirty Paper Coding (DPC) approaches in the Broadcast Channel (BC), otherwise called the multi-user (MU) downlink, in a cell with a base station and mobile terminals equipped with multiple antennas (MU-MIMO). User selection by exhaustive search can be simplified to greedy approaches, in which one user gets added at a time. In this paper, we review an approximate criterion for MISO BF-style selection. For a sufficient amount of users, multiple receive antennas do not lead to increased spatial multiplexing, but we indicate how they affect the high SNR rate offset. The resulting added diversity can be exploited at the cost of more involved user selection and transceiver design. We thus propose a novel receiver design for BF-style MU-MIMO stream selection.
| Mots Clés: | Multiple-input multiple-output, broadcast channel, greedy user selection, sum rate |
| Type: | Conférence |
| Langue: | English |
| Ville: | Bucharest |
| Pays: | ROUMANIE |
| Date: | Août 2012 |
| Département: | Communications Mobiles |
| Eurecom ref: | 3768 |
| Copyright: | © EURASIP. Personal use of this material is permitted. The definitive version of this paper was published in EUSIPCO 2012, 20th European Signal Processing Conference, August 27-31, 2012, Bucharest, Romania and is available at : |
| Bibtex: | @inproceedings{EURECOM+3768, year = {2012}, title = {{U}ser selection in the {MIMO} {BC}}, author = {{L}ejosne, {Y}ohan and {S}lock, {D}irk {T} {M} and {Y}uan-{W}u, {Y}i}, booktitle = {{EUSIPCO} 2012, 20th {E}uropean {S}ignal {P}rocessing {C}onference, {A}ugust 27-31, 2012, {B}ucharest, {R}omania }, address = {{B}ucharest, {ROUMANIE}}, month = {08}, url = {http://www.eurecom.fr/publication/3768} } |
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