Title page for etd-0930117-153227


[Back to Results | New Search]

URN etd-0930117-153227
Author Chih-Yu Tsai
Author's Email Address No Public.
Statistics This thesis had been viewed 5357 times. Download 0 times.
Department Electrical Engineering
Year 2017
Semester 1
Degree Ph.D.
Type of Document
Language zh-TW.Big5 Chinese
Title MIMO Antennas for the Multi-Gbps 5G Smartphone and MIMO Channel Capacity Testing
Date of Defense 2017-10-21
Page Count 148
Keyword
  • MIMO channel capacity
  • twelve MIMO antennas
  • eight MIMO antennas
  • smartphone antennas
  • MIMO antennas
  • mobile antennas
  • 5G mobile communications
  • Abstract The High-Dimensional (HD) MIMO operation with at least eight MIMO streams is a very promising technology for applications in the fifth-generation (5G) mobile communication terminals. HD MIMO can provide a much higher spectral efficiency, thereby increasing the data throughput in practical communications. However, it has been a great challenge for antenna designers to dispose as many as MIMO antennas with low envelope correlation coefficients (ECCs) in the very limited space of the smartphone. In this thesis, promising eight and twelve MIMO antennas for the 5G smartphone are presented. The MIMO antennas are formed by using decoupled two-antenna building blocks. The building block has a small planar size of 7 x 10 mm2 for operating at 3.5-GHz band (3400~3600 MHz) and can be printed on the inner surface of the side-edge frame of the smartphone. Decreased coupling between the two antennas can be obtained without the need of an external decoupling structure. The operating principle and antenna performance of the two decoupled antennas in the building block are presented in this study. To demonstrate Multi-Gbps data throughput for the smartphone, four or six two-antenna building blocks are used to implement eight or twelve MIMO antennas. By using the MIMO testbed developed at NSYSU, the measured channel capacity of about 35 bps/Hz with 20-dB signal-to-noise ratio (SNR) is obtained with eight antennas applied in an 8 x 8 MIMO system. In the case of twelve antennas applied in a 12 x 8 MIMO system, a 3.8-Gbps throughput (about 38 bps/Hz spectral efficiency) with a 100-MHz bandwidth and 256-QAM modulation has also been achieved. To further analyze the channel capacity and throughput of the twelve-antenna smartphone applied in a 12 x 8 MIMO system, the user’s hand effects, various indoor/outdoor scenarios, and the ECC effects are tested. The design concept of the decoupled two-antenna building block has also been applied in achieving 3.5/5.8-GHz dual-band operation for mobile and wireless local area networks. The dual-band eight MIMO antennas have been experimentally studied. The obtained MIMO performance is presented and discussed.
    Advisory Committee
  • Hong-Twu Chen - chair
  • Liang-Che Chou - co-chair
  • Wei-Yu Li - co-chair
  • Cheng-Tse Lee - co-chair
  • Shu-Chuan Chen - co-chair
  • Kin-Lu Wong - advisor
  • Files
  • etd-0930117-153227.pdf
  • Indicate in-campus at 99 year and off-campus access at 99 year.
    Date of Submission 2017-10-30

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys