Introduction of IEEE 802'16e2005

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Introduction of IEEE 802.16e-2005

• 802.16 is a standard for metropolitan area
  network (MAN)
• Providing a low-cost solution to last mile
  internet connection with high transmission rate
  for fixed, portable, and mobile users

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Receiver Structure

• Acquisition mode Distinguish preamble symbol
• Transmission mode Transmit Data
• Receiver architecture
• Timing and frequency synchronization
• Frequency domain Equalization
• Outer channel coding

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Proposed Cell Search Algorithm

• Compensate for three possible CFO values then
  pass through FFT
• FFT Received preamble x CFO_0 RxCompensated0
• FFT Received preamble x CFO_1 RxCompensated1
• FFT Received preamble x CFO_2 RxCompensated2
• Use compensated symbol for corresponding preamble
  set to do differential correlation
• For segment0 preamble set, take RxCompensated0
  index 0,3,6,
• For segment1 preamble set, take RxCompensated1
  index 1,4,7,
• For segment2 preamble set, take RxCompensated2
  index 2,5,8,
• When the peak of preamble set is found, we can
  derive the exact CFO value from the corresponding
  preamble segment

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Proposed ICI Cancellation Method

• Simplified ZF
• Use a power series to expand the inverse matrix
  of NxN channel matrix and take the first 3 terms
• Consider only the ICI contribution of the channel
  matrix diagonal neighboring terms
• Simplified ZF cascading by a PIC equalizer