Roger Pierre Fabris Hoefel

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 We have developed a theoretical cross-layer model that allows assessing the goodput and delay of IEEE 802.11 local area networks (WLANs) operating simultaneously under the distributed coordination function (DCF) basic access (BA) and request-to-send/clear-to-send (RTS/CTS) medium access control (MAC) protocols under saturated traffic over correlated(More)
This research deals with a study of case, unifying theoretical and practical aspects, regarding the cell-planning of Wideband Code Division Multiplexing (WCDMA) Release 99 (Rel99) and High Speed Downlink Packet Access (HSDPA) Rel. 5 networks. The used methodology, validated by the close agreement between field and numerical results for throughput and cell(More)
It is shown analytical and simulation results on the performance of legacy IEEE 802.11a time synchronization algorithms when the synchronization preamble is transmitted by IEEE 802.11n devices with multiple transmitting antennas using cyclic shift diversity. It is concluded that an auto-correlation synchronization scheme allows the legacy compatibility over(More)
—In this paper, we investigate the performance of Least Square (LS), Time Delay Truncation (TDT) and Model-Based (MB) channel estimation schemes specially designed to operate in a orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO) IEEE 802.11n system. We conclude, founded on analytical and simulation results over(More)