Reliable and energy-efficient OFDM based on structured compressive sensing

Linglong Dai, Zhaocheng Wang, Zhixing Yang, Guan Gui, Fumiyuki Adachi

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

    4 Citations (Scopus)

    Abstract

    Compared with standard cyclic prefix OFDM (CP-OFDM), time domain synchronous OFDM (TDS-OFDM) can achieve a higher spectrum efficiency by using the known training sequence instead of CP as the guard interval. However, TDS-OFDM suffers from reduced energy efficiency and performance loss due to the existing mutual inferences. In this paper, based on the newly emerging theory of structured compressive sensing (SCS), we propose a reliable and energy-efficient TDS-OFDM transmission scheme with reduced guard interval power (which is impossible for CP-OFDM) by designing a channel estimation scheme with high accuracy. The wireless channel properties including channel sparsity and inter-channel correlation, which are usually not considered in conventional OFDM schemes, have been exploited. We further exploit the worst-case system design principle to extract multiple interference-free regions of small size to simultaneously reconstruct multiple channels of large size without iterative interference cancellation. In this way, the guard interval power in TDS-OFDM can be reduced to achieve a 20% higher energy efficiency than standard CP-OFDM, and the system reliability can be also improved in fast fading channels.

    Original languageEnglish
    Title of host publication2014 IEEE International Conference on Communications, ICC 2014
    PublisherIEEE Computer Society
    Pages3963-3968
    Number of pages6
    ISBN (Print)9781479920037
    DOIs
    Publication statusPublished - 2014 Jan 1
    Event2014 1st IEEE International Conference on Communications, ICC 2014 - Sydney, NSW, Australia
    Duration: 2014 Jun 102014 Jun 14

    Publication series

    Name2014 IEEE International Conference on Communications, ICC 2014

    Other

    Other2014 1st IEEE International Conference on Communications, ICC 2014
    Country/TerritoryAustralia
    CitySydney, NSW
    Period14/6/1014/6/14

    ASJC Scopus subject areas

    • Computer Networks and Communications

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