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      Low-complexity single-channel blind separation of co-frequency coded signals

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      Low-Complexity Single-Channel Blind Separation.pdf (324.9Kb)
      Author
      Liu, Xiaobei
      Guan, Yong Liang
      Koh, Soo Ngee
      Liu, Zilong
      Wang, Peng
      Date of Issue
      2018
      School
      School of Electrical and Electronic Engineering
      Version
      Accepted version
      Abstract
      Single-channel blind source separation (SCBSS) of uncoordinated, non-spread, co-frequency interfering signals with non-zero carrier frequency offset and timing offset, and without training sequence for channel estimation, is a challenging task. Iterative SCBSS of coded signals leads to good performance but is computationally expensive as it involves the turbo processing of multi-user per-survivor processing and soft-input soft-output channel decoding. In this letter, we propose a low-complexity SCBSS (LC-SCBSS) scheme, which reduces the computational complexity of the conventional iterative SCBSS by using interference-cancellation from the second iteration onward, and adaptive channel truncation for certain users. Simulation results show that the proposed LC-SCBSS reduces the computational complexity by more than 99%, with only a marginal degradation in performance.
      Subject
      Single-channel Blind Source Separation
      Per-survivor Processing
      Engineering::Electrical and electronic engineering
      Type
      Journal Article
      Series/Journal Title
      IEEE Communications Letters
      Rights
      © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: https://doi.org/10.1109/LCOMM.2018.2805332.
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      http://dx.doi.org/10.1109/LCOMM.2018.2805332
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