Random beamforming using low feedback and low latency power allocation

Yuki Tsuchiyat, Tomoaki Ohtsuki, Toshinobu Kaneko

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Random unitary beamforming is one of the schemes reducing the amount of feedback information in multiuser diversity techniques with multiple-antenna downlink transmission. In Multiple-Input Multiple-Output (MIMO) systems, throughput performance is greatly improved using AMC (Adaptive Modulation and Coding). Throughput performance is also improved by allocating power among streams appropriately. In random unitary beamforming, transmitter has only partial channel state information (CSI) of each receiver because of reducing the amount of feedback information. Thus, the power allocation scheme needs to work with only partial CSI and low latency. In this paper, we propose a new power allocation scheme for random unitary beamforming assuming a discrete transmission rate with a small amount of feedback information and low latency. Simulation results show that the proposed scheme can improve throughput compared to conventional power allocation scheme.

Original languageEnglish
Title of host publication2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall
Pages402-406
Number of pages5
DOIs
Publication statusPublished - 2007 Dec 1
Event2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall - Baltimore, MD, United States
Duration: 2007 Sep 302007 Oct 3

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Other

Other2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall
CountryUnited States
CityBaltimore, MD
Period07/9/3007/10/3

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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  • Cite this

    Tsuchiyat, Y., Ohtsuki, T., & Kaneko, T. (2007). Random beamforming using low feedback and low latency power allocation. In 2007 IEEE 66th Vehicular Technology Conference, VTC 2007-Fall (pp. 402-406). [4349745] (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VETECF.2007.96