Title :
A study on reactively steered adaptive array in OFDM systems
Author :
Nakayai, Y. ; Toda, T. ; Hara, S. ; Oishi, Y.
Author_Institution :
Fujitsu Labs. Ltd, Yokosuka, Japan
Abstract :
We propose it new scheme to introduce the REactively Steered Adaptive Array (RESAA) technique into an orthogonal frequency-division multiplexing (OFDM) system. taking advantage of the OFDM-transmission-data-frame format characteristics. Using computer simulation, we evaluate the performance of the proposed RESAA system in suppressing a signal with a delay time exceeding the guard interval as interference under the IEEE802.11a system format. The results show that the proposed scheme provides a significantly faster convergence and a better output signal-to-interference ratio (SIR) compared to the conventional scheme.
Keywords :
OFDM modulation; adaptive antenna arrays; beam steering; convergence of numerical methods; gradient methods; recursive functions; wireless LAN; IEEE802.11a system; OFDM systems; computer simulation; descent algorithm; faster convergence; next-generation wireless communication; output signal-to-interference ratio; reactively steered adaptive array; recursive relation; signal model; transmission-data-frame format; virtual subcarriers; Adaptive arrays; Antenna arrays; Convergence; Delay effects; Energy consumption; Intersymbol interference; Laboratories; OFDM; Signal processing; Wireless communication;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2003. IEEE
Conference_Location :
Columbus, OH, USA
Print_ISBN :
0-7803-7846-6
DOI :
10.1109/APS.2003.1219368
