Time and frequency synchronization for OFDM using PN-sequence preambles

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Abstract

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

Detaljer

Författare
Enheter & grupper
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Elektroteknik och elektronik

Nyckelord

Originalspråkengelska
Titel på värdpublikationProceedings of IEEE Vehicular Technology Conference, Amsterdam, The Netherlands, September 19-22, 1999
FörlagIEEE - Institute of Electrical and Electronics Engineers Inc.
Sidor2203-2207
Volym4
ISBN (tryckt)0-7803-5435-4
StatusPublished - 1999
PublikationskategoriForskning
Peer review utfördJa
EvenemangIEEE VTS 50th Vehicular Technology Conference, VTC 1999 - Fall. - Amsterdam, The Netherlands, Amsterdam, Nederländerna
Varaktighet: 1999 sep 191999 sep 22

Publikationsserier

Namn
Volym4

Konferens

KonferensIEEE VTS 50th Vehicular Technology Conference, VTC 1999 - Fall.
LandNederländerna
OrtAmsterdam
Period1999/09/191999/09/22