Title :
Adaptive beamforming techniques for OFDM based WLAN systems: a comparison between RLS and LMS
Author :
Sanz, úRad ; Corral, Pablo ; De Castro, Antonio Cézar Lima
Author_Institution :
Signal Theor. & Commun., Univ. Miguel Hernandez, Spain
Abstract :
This work presents an study of different adaptive filter algorithms, RLS and LMS, applied in OFDM based WLAN systems. In the simulations, we use Hiperlan/2 standard. In a WLAN environment we can fin a desired signal, interfering signals and noise. In this kind of environment, we have used smart antennas in order to improve radiation diagram and signal/interference ratios. Finally, we compare results of RLS and LMS beamforming.
Keywords :
OFDM modulation; adaptive antenna arrays; adaptive filters; antenna radiation patterns; array signal processing; interference (signal); least mean squares methods; telecommunication standards; wireless LAN; Hiperlan-2 standard; LMS; OFDM based WLAN system; RLS; adaptive beamforming technique; adaptive filter algorithm; least mean square; orthogonal frequency division multiplexing; radiation diagram; recursive least square; signal interference; smart antenna; wireless local area network; Adaptive arrays; Adaptive filters; Array signal processing; Finite impulse response filter; Least squares approximation; OFDM; Physical layer; Resonance light scattering; Wireless LAN; Working environment noise;
Conference_Titel :
Mobile Future, 2004 and the Symposium on Trends in Communications. SympoTIC '04. Joint IST Workshop on
Print_ISBN :
0-7803-8556-X
DOI :
10.1109/TIC.2004.1409491
