Fast algorithm of LTE RACH detection based on Sparse Fourier Transform

Aleksei Fedorov, Vladimir Lyashev, Lev Rapoport

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

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Abstract

In this paper, we present a fast algorithm of time synchronization between User Equipment (UE) and Base Station (BS) which is suitable for Long Term Evolution (LTE) Random Access Channel (RACH). The algorithm reduces the complexity more than 1.5 times. Further, if the SNR is above a threshold, the algorithm allows to extremely reduce the complexity of synchronization more than 3 times. The presented method uses the sparse nature of a time synchronization problem, where the spike of a cross-correlation between received signal and local RACH preamble indicates correct time delay.
Original languageEnglish
Title of host publication2015 Third International Conference on Digital Information, Networking, and Wireless Communications (DINWC)
Number of pages6
ISBN (Electronic)978-1-4799-6376-8
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventThird International Conference on Digital Information, Networking, and Wireless Communications (DINWC) - Moscow, Russian Federation
Duration: 2015 Feb 32015 Feb 5

Conference

ConferenceThird International Conference on Digital Information, Networking, and Wireless Communications (DINWC)
Country/TerritoryRussian Federation
CityMoscow
Period2015/02/032015/02/05

Subject classification (UKÄ)

  • Communication Systems

Free keywords

  • sparse Fourier transform
  • RACH synchronization
  • LTE
  • , synchronization complexity
  • OFDM
  • sparse optimization

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