Concurrent channel access and estimation for scalable multiuser MIMO networking

Author

Tsung-Han Lin ; Kung, H.T.

fYear

2013

fDate

14-19 April 2013

Firstpage

140

Lastpage

144

Abstract

This paper presents MIMO/CON, a PHY/MAC cross-layer design for multiuser MIMO wireless networks that delivers throughput scalable to many users. MIMO/CON supports concurrent channel access from uncoordinated and loosely synchronized users. This new capability allows a multi-antenna MIMO access point (AP) to fully realize its MIMO capacity gain. MIMO/CON draws insight from compressive sensing to carry out concurrent channel estimation. In the MAC layer, MIMO/CON boosts channel utilization by exploiting normal MAC layer retransmissions to recover otherwise undecodable packets in a collision. MIMO/CON has been implemented and validated on a 4×4 MIMO testbed with software-defined radios. In software simulations, MIMO/CON achieves a 210% improvement in MAC throughput over existing staggered access protocols in a 5-antenna AP scenario.

Keywords

MIMO communication; access protocols; antenna arrays; channel estimation; multiuser channels; radio networks; software radio; 5-antenna AP scenario; MAC layer retransmission; MIMO capacity gain; MIMO-CON boosts channel utilization; PHY-MAC cross-layer design; compressive sensing; concurrent channel access; concurrent channel estimation; multiantenna MIMO access point; multiuser MIMO wireless networks; scalable multiuser MIMO networking; software-defined radio; synchronized users; Antennas; Channel estimation; Decoding; Delays; MIMO; Throughput; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

INFOCOM, 2013 Proceedings IEEE

Conference_Location

Turin

ISSN

0743-166X

Print_ISBN

978-1-4673-5944-3

Type

conf

DOI

10.1109/INFCOM.2013.6566751

Filename

6566751