ITEE Ph.D confirmation seminar: Wai Yie Leong, 11.00AM, Thu 12 Jun 2003

Enhancing interference mitigation in wireless communication

Speaker: Wai Yie Leong, ITEE

When: 11.00AM, Thursday 12 Jun 2003

Venue: 78-420

Host: Dr. John Homer

Abstract:

  Wireless technology is revolutionizing the way we share information
  and communicate. The demands for mobility have made wireless
  technology the primary source for voice communication. Spread
  spectrum is a technique in which the transmitted signal is spread
  over a broader portion of the radio frequency band, by means of a
  code independent of the data. This technique will allow a better
  performance over a fading channel, inherent privacy, and immunity to
  narrowband interference. The FCC has restricted the commercial use
  of this technology due to the increased frequency space it
  occupies. Therefore, steps have to be taken to overcome the
  co-existence of wireless devices over this radio band. In this
  report, the author proposes to adopt blind source separation
  techniques and wavelets analysis for interference mitigation in the
  ISM band. These techniques strive to separate a mixture of N
  independent non-Gaussian signals received on an array of sensors and
  as such produce a signal with reduced jammer contamination. With the
  jammer mostly mitigated through the separation process, the SS
  system requires smaller spreading gain and transmission bandwidth
  than the case in which no separation is performed.  The proposed
  spread spectrum receiver based on source separation improves the SNR
  at the correlator output and its performance is robust to multipath
  and a coherent jamming environment. Simulation results, which
  include other algorithms/techniques, are provided to illustrate the
  effectiveness of the proposed approach.

Biography:

  Wai yie  has received the degree of Bachelor of Electrical
  Engineering from the University of Queensland in 2001.  she is
  currently undertaking a Ph.D. at the University of Queensland in the
  area of Wireless communication. Her research interests include blind 
  signal separation,wavelet analysis, fuzzy logic and  denoising method.

Type:

Ph.D confirmation

Contact:

Dr. John Homer, seminar host (homerj@itee.uq.edu.au)
or Guido Governatori (ITEE seminar co-ordinator) (guido@itee.uq.edu.au)

ITEE seminar web page: http://www.itee.uq.edu.au/~seminar

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