A time and frequency synchronization scheme for multiuser OFDM
1999 (English)In: IEEE Journal on Selected Areas in Communications, ISSN 0733-8716, E-ISSN 1558-0008, Vol. 17, no 11, 1900-1914 p.Article in journal (Refereed) Published
We present a multiuser synchronization scheme for tracking the mobile's uplink time and frequency offsets. It uses the redundancy introduced by the cyclic prefix and does not need additional pilots. We show performance results of an orthogonal frequency division multiplexing (OFDM)-based radio interface based on universal mobile telecommunication system (UMTS) parameters. For a UMTS-typical mobile channel environment, the performance of a coherent system employing the scheme is virtually indistinguishable from the performance of a perfectly synchronized system. In a differentially modulated system, synchronization errors decrease the system performance by about 0.7 dB compared to a perfectly synchronized system. Index Terms - Communication system, delay estimation, frequency estimation, multicarrier, multiuser system, orthogonal frequency division multiplexing (OFDM), synchronization, universal mobile telecommunication system (UMTS).
Place, publisher, year, edition, pages
1999. Vol. 17, no 11, 1900-1914 p.
Research subject Signal Processing
IdentifiersURN: urn:nbn:se:ltu:diva-11709DOI: 10.1109/49.806820Local ID: ab7d3c10-07d6-11dd-97e0-000ea68e967bOAI: oai:DiVA.org:ltu-11709DiVA: diva2:984659
Godkänd; 1999; 20080411 (ysko)2016-09-292016-09-29Bibliographically approved