Design and Implementation of a WiMAX Baseband Processor by ocv22853

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									Design and Implementation of a
      WiMAX Baseband
          Processor

          Student:莊宜豐
Outline
• Introduction
•WiMAX
•FPGA
• Architecture Design
•Transmitter Architecture
•Receiver Architecture
• Conclusions
              Introduction
•   It provides one baseband processor.
    First, building the models of the
    transmitter, the wireless channel.

•   Using VHDL language to design and
    implement the circuit. Finally, verifying
    the circuit on FPGA.
       WiMAX

 WiMAX                     Point-to-point(P2P)
Base station




                                                  WiMAX
                                                 Base station




Point-to-multipoint(PMP)
                      FPGA
              (Field Programmable Gate Array )

1.   Performance
2.   Design Time
3.   Design Cost
4.   Manufacturing Cost
5.   Short Design Time
       FPGA
(Field Programmable Gate Array )
Transmitter Architecture
Receiver Architecture
• Frame Detection
•   Frame Synchronization of the (Long/Short) Preamble
•   (Fine/Coarse) Frequency Synchronization
•   Fast Fourier Transform (FFT)
•   Channel Estimation
•   Equalizer
•   Channel Tracking
•    Timing Synchronization
Five steps for deriving correct the signals.




       The flow diagram of the receiver. (Step 1)
The flow diagram of the receiver. (Step 2)
The flow diagram of the receiver. (Step 3)
The flow diagram of the receiver. (Step 4)
The flow diagram of the receiver. (Step 5)
Summary:
• For step 1, this step would save a lots power
  consumptions.
• For step 5, the proposed receiver turn four blocks off
  until next subframe arriving so that it also saves a lots
  power consumptions.
• Therefore, it is more suitable for the mobile
  communication system.
               Conclusions
• In this thesis, a baseband processor
  conforming to IEEE 802.16-2004 OFDM
  specifications are proposed. There are two
  main components in the inner receiver.

• In the software simulation and prototyping
  measurement, all results are functionally
  correct and provide satisfactory
  performance.
END
        Circuit Design
Channel Estimator

								
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