Title :
Comparison of the Smart Antenna Architectures for OFDM-WLAN Systems in a Rich Multipath Environment based on a Spatio-Temporal Channel Model
Author :
Alihemmati, R. ; Shishegar, A.A. ; Hojjat, N. ; Dadashzadeh, G. ; Boghrati, B. ; Mehrtash, A.
Author_Institution :
Iran Telecommun. Res. Center
Abstract :
The smart antenna technique as a method of improving the physical layer performance of OFDM WLANs is studied. For this purpose, a comparison of the smart antenna architectures for IEEE 802.11a WLAN system using pre-FFT and post-FFT array processing with different parameters is represented. Simulations are performed on a new Simulink model for IEEE802.11a system using a spatio-temporal channel modeling which is based on the measured wideband channels in the 5 GHz band. Raw bit-error-rate performance for QPSK/16QAM modulations at LOS and NLOS channel scenarios are evaluated and compared
Keywords :
OFDM modulation; adaptive antenna arrays; error statistics; fast Fourier transforms; multipath channels; quadrature amplitude modulation; quadrature phase shift keying; wireless LAN; FFT; IEEE 802.11; NLOS channel; OFDM-WLAN systems; QAM modulations; QPSK; array processing; bit-error-rate performance; multipath environment; smart antenna architectures; spatio-temporal channel model; wideband channels; Adaptive arrays; Antenna arrays; Antenna measurements; Array signal processing; Degradation; Fading; OFDM modulation; Physical layer; Transmitting antennas; Wireless LAN; IEEE802.11a; OFDM; Post-FFT; Pre-FFT; Smart Antenna; Spatio-Temporal Multipath Channel; WLAN;
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.2005.1651406
