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Search: swepub > Ottersten Björn 1961 > Royal Institute of Technology > Shankar M. R. Bhavani

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1.
  • Zenteno, Efrain, et al. (author)
  • Multiple-input multiple-output symbol rate signal digital predistorter for non-linear multi-carrier satellite channels
  • 2015
  • In: IET Communications. - : Institution of Engineering and Technology. - 1751-8628 .- 1751-8636. ; 9:16, s. 2053-2059
  • Journal article (peer-reviewed)abstract
    • A digital predistortion (DPD) scheme is presented for non-linear distortion mitigation in multi-carrier satellite communication channels. The proposed DPD has a multiple-input multiple-output architecture similar to data DPD schemes. However, it enhances the mitigation performance of data DPDs using a multi-rate processing algorithm to achieve spectrum broadening of non-linear operators. Compared to single carrier (single-input single-output) signal (waveform) DPD schemes, the proposed DPD has lower digital processing rate reducing the required hardware cost of the predistorter. The proposed DPD outperforms, in total degradation, both data and signal DPD schemes. Further, it performs closest to a channel bound described by an ideally mitigated channel with limited maximum output power.
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2.
  • Abu-Shaban, Zohair, et al. (author)
  • Reduced complexity satellite broadcast receiver with interference mitigation in correlated noise
  • 2018
  • In: International Journal of Satellite Communications And Networking. - : Edward Elgar Publishing. - 1542-0973 .- 1542-0981. ; 36:5, s. 402-415
  • Journal article (peer-reviewed)abstract
    • The recent commercial trends towards using smaller dish antennas for satellite receivers and the growing density of broadcasting satellites necessitate the application of robust adjacent satellite interference cancellation schemes. This orbital density growth along with the wider beamwidth of a smaller dish have imposed an overloaded scenario at the satellite receiver, where the number of transmitting satellites exceeds the number of receiving elements at the dish antenna. To ensure successful operation in this practical scenario, we propose a satellite receiver that enhances signal detection from the desired satellite by mitigating the interference from neighboring satellites. Towards this objective, we propose an enhanced list-based group-wise search detection (E-LGSD) receiver under the assumption of spatially correlated additive noise. To further enhance detection performance, the proposed satellite receiver utilizes a newly designed whitening filter to remove the spatial correlation among the noise parameters, while also applying a preprocessor that maximizes the signal-to-interference-plus-noise ratio. We exploit the structure of this filter and propose a reduced complexity LGSD (RC-LGSD) receiver. Extensive simulations under practical scenarios show that the proposed receiver enhances the performance of satellite broadcast systems in the presence of adjacent satellite interference compared with existing methods. Also, under pointing error, RC-LGSD exhibits similar behavior to that of the optimum receiver
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  • Result 1-10 of 38

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