文档介绍：Real Time Implementation on FPGA of an OFDM based Wireless LAN modem
extended with Adaptive Loading
Maryse Wouters, Geert Vanwijnsberghe, Peter Van Wesemael, Tom Huybrechts,
Steven Thoen
Imec vzw, DESICS, Kapeldreef 75,B-3001 Heverlee,Belgium
Maryse.******@
Abstract order to improve the performance and the link capacity.
One means to increase the capacity of wireless LAN is
Future wireless applications target multimedia and applying adaptive loading on top of the OFDM
high-speed access, all requiring techniques to modulation. Simulations [2] show that a gain of 6 dB is
-2
improve the link capacity and robustness. For wireless achieved at BER of 10 and even better improvement is
Local work (LAN) the standards have chosen achieved at higher Eb/N0. In the study done in [2] the
orthogonal frequency division multiplex (OFDM) as Fischer et al [3] algorithm is selected because of its low
modulation scheme. An extension beyond the plexity and its similar performance
to improve the link capacity is adaptive loading. pared to other algorithms. This paper presents the
paper presents the implementation aspects of an OFDM implementation aspects of the adaptive loading algorithm
based wireless LAN modem together with adaptive and its integration with the OFDM baseband modem.
loading on field programmable gate array (FPGA). The The OFDM modem is modeled in