Title page for etd-0608113-171506


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URN etd-0608113-171506
Author Wen-tsen Chiang
Author's Email Address No Public.
Statistics This thesis had been viewed 5385 times. Download 512 times.
Department Communications Engineering
Year 2012
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Minimum Power Precoding Design in Coordinated Multi-point System with Imperfect CSI
Date of Defense 2013-06-28
Page Count 36
Keyword
  • minimize total power
  • beamforming
  • imperfect CSI
  • precoder
  • coordinated multi-point transmission and reception(CoMP)
  • Abstract Abstract
    With increasing demand on data rate for various mobile services, radio spectrum becomes over-crowded and scarce gradually. To overcome the difficulty, emerging cellular system tend to allow adjacent cells to access the same frequency bands. However, this spectrum allocation results in severe inter-cell interference (ICI). In the long term evolution-advanced (LTE-A) proposed by the third generation partnership project (3GPP), coordinated multi-point (CoMP) transmission and reception technique is employed to reduce ICI effectively and improve throughput of cell-edge devices through coordinated transmission among base station (BS) cross multiple cells. CoMP technique can be divided into two classes, namely join processing (CoMP-JP) and coordinated beamforming (CoMP-CBF). In CoMP-JP scheme, BSs jointly transmit signals to user equipment (UE) belong to multiple cells, which requires BSs to exchange data of all UEs and global channel state information (CSI). In CoMP-CBF scheme, each BS simply transmits data to the subscribed UE. Compared with the CoMP-JP scheme, the CoMP-CBF scheme simply needs exchange of global CSI, and demands much less backhaul loading. To pursue the trend of green communication, the thesis designs precoders at BSs to minimize aggregate power consumption over all BSs under the constraint that signal quality at each UE is guaranteed, In practice, channel information exists a certain degree of errors resulted from channel estimation or quantization. Thus, we also take imperfect CSI into account and propose a robust precoding design by considering the dynamic range of channel information errors. Through simulation results, it shows that this precoder design is able to guarantee the quality of UE’s signal and consumes the minimum transmission power.
    Index Terms—coordinated multi-point transmission and reception(CoMP), precoder, beamforming, minimize total power, imperfect CSI.
    Advisory Committee
  • Wei-Ho Chung - chair
  • Fan-Shuo Tseng - co-chair
  • Chih-Peng Li - co-chair
  • Wan-Jen Huang - advisor
  • Files
  • etd-0608113-171506.pdf
  • Indicate in-campus at 0 year and off-campus access at 2 year.
    Date of Submission 2013-07-08

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