Blind identification of distributed antenna systems with multiple carrier frequency offsets

Anning Yu, Athina P. Petropulu, H. Vincent Poor

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

3 Scopus citations

Abstract

In spatially distributed multiuser antenna systems, the received signal contains multiple carrier-frequency offsets (CFOs) arising from mismatch between the oscillators of transmitters and receivers. This results in a time-varying rotation of the data constellation, which needs to be compensated at the receiver before symbol recovery. In this paper, a new approach for blind CFO estimation and symbol recovery is proposed. The received base-band signal is over-sampled, and its polyphase components are used to formulate a virtual Multiple-Input Multiple-Output (MIMO) problem. By applying blind MIMO system estimation techniques, the system response can be estimated and decoupled versions of the user symbols can be recovered, each one of which contains a distinct CFO. By applying a decision feedback Phase Lock Loop (PLL), the CFO can be mitigated and the transmitted symbols can be recovered. The estimated MIMO system response provides information about the CFOs that can be used to initialize the PLL, speed up its convergence, and avoid ambiguities usually linked with PLL.

Original languageEnglish (US)
Title of host publicationSPAWC 2007 - 8th IEEE Workshop on Signal Advances in Wireless Communications
StatePublished - Dec 1 2007
Event8th IEEE Signal Processing Advances in Wireless Communications, SPAWC 2007 - Helsinki, Finland
Duration: Jun 17 2007Jun 20 2007

Publication series

NameIEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

Other

Other8th IEEE Signal Processing Advances in Wireless Communications, SPAWC 2007
CountryFinland
CityHelsinki
Period6/17/076/20/07

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Engineering(all)

Keywords

  • Blind MIMO system identification
  • Carrier frequency offset
  • Distributed antenna systems
  • Multi-user systems

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  • Cite this

    Yu, A., Petropulu, A. P., & Poor, H. V. (2007). Blind identification of distributed antenna systems with multiple carrier frequency offsets. In SPAWC 2007 - 8th IEEE Workshop on Signal Advances in Wireless Communications [4401411] (IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC).