Achievable throughput for dual-mode limited-feedback transmit beamforming over temporally correlated wireless channels

Yi Chieh Chang*, Jwo-Yuh Wu, Ta-Sung Lee

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Achieving high system throughput for limitedfeedback communications against the time-varying channel effect is rather crucial in modern mobile system designs. Within the beamforming setup, this paper derives analytic throughput results for both the "more feedback less often" and "less feedback more often" scenarios. More specifically, under the assumptions that (i) the channels over two consecutive time slots follow the first-order Markov model and (ii) in each time slot, reliable feedback of a fixed amount of bits is allowed, the achievable system throughput over two consecutive time slots in both scenarios are characterized. In particular, while the exact throughput is in an integral form, we derive the associated closed-form approximate formulae which facilitate throughput evaluation without resorting to numerical integration. The analytic results also lead to a very low-complexity throughput-based mode selection scheme. Simulation study shows that: (1) the derived closed-form approximation is quite accurate; (2) with the aid of the proposed mode selection method, the throughput performance is robust against the channel temporal variation.

Original languageEnglish
Title of host publication2010 IEEE 71st Vehicular Technology
DOIs
StatePublished - 30 Jul 2010
Event2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring - Taipei, Taiwan
Duration: 16 May 201019 May 2010

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Conference

Conference2010 IEEE 71st Vehicular Technology Conference, VTC 2010-Spring
CountryTaiwan
CityTaipei
Period16/05/1019/05/10

Keywords

  • Beamforming
  • Limited-feedback communications
  • Mode selection
  • Throughput
  • Time-varying channels

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