Space time coding in MIMO systems Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/hd76s431p

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  • Multiple-input multiple-output (MIMO) antenna technology is promising for high-speed wireless communications without increasing the transmission band- width. Space time coding (STC) is a scheme that employs multiple antennas to increase transmission rate or to improve transmission quality. STC is used widely in mobile cellular networks, wireless local area networks (WLAN) and wireless metropolitan area networks (WMAN). However, there are still many unsolved or partially solved issues in STC. In this thesis, I propose a new STC design from cyclic design. I then propose a systematic method to design quasi-orthogonal space time block codes (QOSTBC) for an arbitrary number of transmit antennas, and derive the optimal constellation rotation angles to achieve full diversity. I also propose an analytical method to derive the exact error probabilities of orthogonal space time block codes (OSTBC). In order to improve the error performance, I introduce an adaptive power allocation scheme for OSTBC. Combining STC with continuous phase modulation (CPM) is an attractive solution for mobile commu- nications for which power is limited. Thus, I apply OSTBC to binary CPM with modulation index h = 0.5, and develop a simplified receiver for such scheme. Finally, I present a decoding method to reduce the complexity of QOSTBC without degrading its error performance.
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  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2006-09-06T16:41:57Z (GMT) No. of bitstreams: 1 mythesis.pdf: 648241 bytes, checksum: ffa1ab5ca623f3fb11053ae35e65cfe3 (MD5)
  • description.provenance : Made available in DSpace on 2006-09-13T16:53:05Z (GMT). No. of bitstreams: 1 mythesis.pdf: 648241 bytes, checksum: ffa1ab5ca623f3fb11053ae35e65cfe3 (MD5)
  • description.provenance : Submitted by Liang Xian (xianl@onid.orst.edu) on 2006-08-28T21:27:07Z No. of bitstreams: 1 mythesis.pdf: 648241 bytes, checksum: ffa1ab5ca623f3fb11053ae35e65cfe3 (MD5)

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