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Design and Implementation of a VLSI Architecture for Time and Frequency Synchronization in the LTE

Golnari, Amene | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42795 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Shabany, Mahdi
  7. Abstract:
  8. The long term evolution (LTE) standard is introduced and developed by the 3rd generation partnership project (3GPP) based on orthogonal frequency division multiplexing (OFDM). OFDM systems, in spite of having many advantages such high performance in bandwidth usage, are very sensitive to inter carrier interference (ICI) as a drawback. In order to prevent ICI, the frequency offset, mainly caused by the miss-match between oscillators' frequency and also between the sampling frequency of the transmitter and the receiver, should be estimated and compensated. Frequency synchronization is a part of the tasks of a synchronizer. In this thesis, main tasks of a synchronizer are illustrated and relevant literature is discussed. Considering past works and the main challenges of synchronization in the LTE a structure is proposed which shows acceptable performance in all transmission situations described by the LTE. This structure is also implemented and fully tested on FPGA, besides the ASIC structure is implemented. The implemented structure has very low complexity. There is a more than 90% reduction in the areas of the primary synchronization signal (PSS) detection and the frequency tracking blocks of the proposed structure in compared to similar implemented structures.

  9. Keywords:
  10. Frequency Offset ; Synchronisation ; Tracking ; Orthogonal Frequency Division Multiplexing (OFDM) ; Long Time Evolution (LTE)Standard ; Primary Syncronization Signal (PSS)

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