Title :
Preamble design for multiple-antenna OFDM-based WLANs with null subcarriers
Author :
Larsson, Erik G. ; Li, Jian
Author_Institution :
Dept. of Electr. & Comput. Eng., Florida Univ., Gainesville, FL, USA
Abstract :
The so-called orthogonal frequency division multiplexing (OFDM) technique has received considerable interest, especially in the area of wireless local area networks (WLANs). One way of meeting the demands for increased data rates in WLANs is to provide the transmitter and receiver with multiple antennas. In this letter, we consider the estimation of the channel and the design of optimal preambles (training sequences) for an OFDM system with two transmit and multiple receive antennas.
Keywords :
OFDM modulation; antenna arrays; radio receivers; radio transmitters; receiving antennas; transmitting antennas; wireless LAN; channel estimation; multiple-antenna OFDM-based WLAN; null subcarriers; orthogonal frequency division multiplexing technique; preamble design; receive antenna arrays; training sequences; transmit antenna arrays; wireless local area networks; Channel estimation; Discrete Fourier transforms; Frequency synchronization; OFDM; Receiving antennas; Signal processing; Timing; Transmitters; Transmitting antennas; Wireless LAN;
Journal_Title :
Signal Processing Letters, IEEE
