Title :
MIMO preamble design with a subset of subcarriers in OFDM-based WLAN
Author :
Liang, Ting-Jung ; Fettweis, Gerhard
Author_Institution :
Vodafone Chair Mobile Commun. Syst., Dresden Univ. of Technol., Germany
fDate :
30 May-1 June 2005
Abstract :
This paper deals with how to design a MIMO preamble for OFDM-based WLAN with a subset of subcarriers, which decreases the performance of channel estimation in MIMO. A practical MIMO preamble design should consider mean square error (MSE) of channel estimate, peak-to-average-power-ratio (PAPR) and autocorrelation functions (ACF) together. Our results show that the phase-shift (PS) codes modified by the "jumping design", "seed sequence" and the "known scrambler" together perform good regarding MSE, PAPR and ACF respectively. The combined design is proposed as new long training symbols at the second part of a preamble.
Keywords :
MIMO systems; OFDM modulation; channel coding; channel estimation; mean square error methods; wireless LAN; MIMO preamble design; OFDM-based WLAN; autocorrelation functions; channel estimation; jumping design; known scrambler; mean square error; peak-to-average-power-ratio; phase-shift codes; seed sequence; subcarriers subset; Autocorrelation; Channel estimation; Frequency domain analysis; Frequency synchronization; MIMO; Mean square error methods; Peak to average power ratio; Receiving antennas; Transmitting antennas; Wireless LAN;
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
Print_ISBN :
0-7803-8887-9
DOI :
10.1109/VETECS.2005.1543463
