Title page for etd-0721115-153144


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URN etd-0721115-153144
Author Jheng-Liang Cai
Author's Email Address No Public.
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Department Communications Engineering
Year 2014
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title A Study on the 2-D Angle of Arrival Estimation and Receiver Design in Massive MIMO Systems
Date of Defense 2015-07-29
Page Count 52
Keyword
  • Hybrid analog and digital arrays
  • Massive MIMO
  • Millimeter wave (mmWave)
  • AoA Estimation
  • EstimateSignal Parameters via Rotational Invariance Technique (ESPRIT)
  • Multistage Weiner Filter (MWF)
  • Abstract Millimeter wave (mmWave) transmission plays the key technology to implement the massive multiple-input and multiple-output (MIMO) systems and becomes a promising technology for the 5G cellular system. However, owing to the large scale multiple antennas used and high-cost RF chains, it is impractical to use all digital arrays to detect the signals. In this thesis, we first design the estimating signal parameters via rotational invariance technique (ESPRIT) with hybrid analog and digital arrays for two-dimensional (2-D) angle of arrivals (AoA) estimation in massive MIMO systems.The estimated AoAs are the key parameters to reconstruct the mmWave channel in poor scattering environment. Then, considering the nature of the sparse channel, we apply the multistage Weiner filter (MWF) technology to design a low-complexity receiver beamformerfor a specific hybrid arrays. In this structure, each RF chain can connect to all the analog antennas, and both the analog phase shifter and the digital beamformer are joint optimized by the minimum mean-square error (MMSE) criterion. Simulation results show that our ESPRIT-based AOA estimation with hybrid arrays is comparable with all digital arrays under the sparse AoA signals, and it poses a lower hardware cost. Similar results can also be observed for the proposed low-complexity beamformer design which benefits from a lower computational complexity and can approach to the performance of full digitized beamformer.
    Advisory Committee
  • Chih-Peng Li - chair
  • Lin, Chun-Tao - co-chair
  • Tsang-Yi Wang - co-chair
  • Wan-Jen Huang - co-chair
  • Fan-Shuo Tseng - advisor
  • Files
  • etd-0721115-153144.pdf
  • Indicate in-campus at 2 year and off-campus access at 2 year.
    Date of Submission 2015-08-21

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