Title :
A link adaptation metric for OFDM-based WLAN systems: received equalised modulation accuracy (REMA)
Author :
Penther, Bertrand ; Bouttier, Arnaud ; Rollet, Romain
Author_Institution :
Telecommun. Lab., Mitsubishi Electr. Inf. Technol. Eur., Rennes, France
Abstract :
OFDM-based broadband wireless LAN standards like IEEE 802.11a or ETSI/BRAN HiperLAN/2 rely on adaptive modulation and coding for link adaptation. The paper presents a novel link adaptation metric that enables a better prediction of the BER/PER performance without a priori knowledge of the channel profile. This metric computes statistics from the output of the equalizer in order to take into account the channel noise and multipath fading conditions at the same time. Simulation and experiments show that the proposed scheme is able to improve the overall system performance with a reasonable implementation cost.
Keywords :
AWGN channels; adaptive codes; adaptive modulation; broadband networks; equalisers; error statistics; fading channels; modulation coding; multipath channels; statistical analysis; wireless LAN; AWGN channel; BER performance; ETSI/BRAN HiperLAN/2; IEEE 802.11a; OFDM-based WLAN systems; PER performance; adaptive coding; adaptive modulation; broadband wireless LAN standards; channel noise; equalizer output; link adaptation metric; multipath fading; received equalised modulation accuracy; Bit error rate; Computational modeling; Costs; Equalizers; Fading; Modulation coding; Statistics; System performance; Telecommunication standards; Wireless LAN;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC2004-Fall. 2004 IEEE 60th
Print_ISBN :
0-7803-8521-7
DOI :
10.1109/VETECF.2004.1400087
