In wireless access systems, there has been much interest in enhancing the performance of
orthogonal frequency division multiplexing (OFDM) in a frequency selective fading channel.
If the channel is static and is perfectly known to both the transmitter and the receiver, the
water-filling technique with adaptive modulation is known to be optimal [1]. However, for
OFDM systems, this requires intensive traffic overheads for reporting channel side
information on all subcarriers to the transmitter. In this paper, we propose an adaptive …

In wireless access systems, there has been much interest in enhancing the performance of
orthogonal frequency division multiplexing OFDM) in a frequency selective fading channel. If
the channel is static and is perfectly known to both the transmitter and the receiver, the water-
filling technique with adaptive modulation is known to be optimal. However, for OFDM
systems, this requires intensive traffic overheads for reporting channel side information on
all subcarriers to the transmitter In this paper, we propose an adaptive modulation and …