Synchronization in OFDM-based WLAN with Transmit and Receive Diversities
Conference: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
09/11/2005 - 09/14/2005 at Berlin, Germany
Proceedings: PIMRC 2005
Pages: 5Language: englishTyp: PDF
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Authors:
Liang, Ting-Jung; Li, Xin; Irmer, Ralf; Fettweis, Gerhard (Vodafone Chair Mobile Communications Systems, Dresden University of Technology, 01062 Dresden, Germany)
Abstract:
This paper deals with the feasibility of improving synchronization (packet detection and frequency synchronization) of OFDM systems by exploiting transmit and receive diversities. Starting from a performance analysis of SISO synchronization, SIMO, MISO and MIMO synchronization algorithms are proposed and analyzed step by step. Simulations for IEEE 802.11a/g/n-like systems in frequency-selective channels show that the performance of packet detection can be improved by 6.5 dB and the residual frequency synchronization error can be reduced by 68.7%, if 4 transmit antennas and 4 receive antennas are used. For that, carefully designed training sequences and respective transmitter and receiver algorithms are necessary.