Title :
Synchronization in OFDM-based WLAN with transmit and receive diversities
Author :
Liang, Ting-Jung ; Li, Xin ; Irmer, Ralf ; Fettweis, Gerhard
Author_Institution :
Vodafone Chair Mobile Commun. Syst., Dresden Univ. of Technol.
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
Keywords :
MIMO systems; OFDM modulation; antenna arrays; diversity reception; packet radio networks; receiving antennas; sequences; synchronisation; transmitting antennas; wireless LAN; wireless channels; IEEE 802.11a system; IEEE 802.11g system; IEEE 802.11n system; MIMO; MISO; OFDM-based WLAN; SIMO; SISO; diversity reception; diversity transmission; frequency synchronization error; frequency-selective channels; multiple input multiple output; orthogonal frequency division multiplexing; packet detection; receiving antennas; sequences; single input single output; transmitting antennas; wireless local area network; Algorithm design and analysis; Channel estimation; Frequency synchronization; MIMO; Mobile communication; Performance analysis; Receiving antennas; Transmitters; Transmitting antennas; Wireless LAN;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2005. PIMRC 2005. IEEE 16th International Symposium on
Conference_Location :
Berlin
Print_ISBN :
9.7838007291e+012
DOI :
10.1109/PIMRC.2005.1651541
