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Time and frequency synchronization for OFDM using PN-sequence preambles

Publiceringsår: 1999
Språk: Engelska
Sidor: 2203-2207
Publikation/Tidskrift/Serie: Proceedings of IEEE Vehicular Technology Conference, Amsterdam, The Netherlands, September 19-22, 1999
Volym: 4
Dokumenttyp: Konferensbidrag
Förlag: IEEE--Institute of Electrical and Electronics Engineers Inc.


Fast and reliable time and frequency synchronization is crucial for packet-based orthogonal frequency division multiplex (OFDM) systems. In this paper we compare and analyze preambles for OFDM systems based on repeated OFDM data symbols or repeated short pseudonoise sequences (PN-sequences). We make an analytical evaluation for AWGN channels and simulate the performance in oneand two-tap Rayleigh fading channels. The PN-based preamble gives better detection properties in terms of lower false detection probability and lower probability of missing the synchronization signal. The PN-based preamble has low peak-to-average power ratio and it makes it possible to use an ADC with one-bit quantization in stand-by mode. For frequency offset estimation both preambles give similar performance, but the PN-based preamble allows for a greater reduction in stand-by mode power consumption


  • Electrical Engineering, Electronic Engineering, Information Engineering
  • wireless LAN
  • synchronisation
  • spread spectrum communication
  • quantisation (signal)
  • pseudonoise codes
  • probability
  • OFDM modulation
  • AWGN channels
  • data communication
  • Rayleigh channels
  • frequency estimation
  • packet radio networks


IEEE VTS 50th Vehicular Technology Conference, VTC 1999 - Fall.
  • ISBN: 0-7803-5435-4

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