Practical Demonstration of Limited Feedback Beamforming for mmWave Systems

D.E. Berraki, Tom H Barratt, M.A. Beach, S.M.D. Armour, A.R. Nix

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

4 Citations (Scopus)


This paper presents a practical demonstration of the benefits of limited feedback beamforming for mmWave applications. Different beamforming strategies are presented, analysed and compared. Compressive sensing (CS) is investigated to accurately estimate the sparse Power Angular Profile (PAP) of the mmWave channel. This information is then used to estimate the antenna array weights required to steer the beam to maximise received SNR. This scheme is particularly attractive for outdoor mmWave networks where large antenna arrays are necessary to mitigate high observed pathloss. Codebook based beamforming strategies are also analysed. Using a practical mmWave antenna away, measurements are reported for a controlled multipath channel that compare the performance of the proposed beamforming strategies. In terms of received SNR CS based beamforming was shown to outperform more traditional codebook based solutions by to 5dB.
Original languageEnglish
Title of host publicationVehicular Technology Conference (VTC Spring), 2015 IEEE 81st
Number of pages5
Publication statusPublished - 13 May 2015


  • array signal processing
  • compressed sensing
  • millimetre wave antenna arrays
  • millimetre wave propagation
  • multipath channels
  • CS based beamforming
  • PAP
  • antenna array weights
  • codebook based beamforming strategies
  • compressive sensing
  • controlled multipath channel
  • large antenna arrays
  • limited feedback beamforming
  • mmWave antenna away
  • mmWave applications
  • mmWave channel
  • outdoor mmWave networks
  • received SNR
  • sparse power angular profile
  • Antenna arrays
  • Antenna measurements
  • Array signal processing
  • Arrays
  • Azimuth
  • Receivers


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