Title :
Performance of multiresolution OFDM on frequency-selective fading channels
Author :
Kim, Dongkyu ; Stuber, Gordon L.
Author_Institution :
Lucent Technol., Atlanta, GA
fDate :
9/1/1999 12:00:00 AM
Abstract :
Several multiresolution modulation (MRM) schemes with orthogonal frequency division multiplexing (OFDM) are examined. The effect of interchannel interference (ICI) caused by channel time variation and carrier frequency offset is considered. The performances of the multiresolution schemes for both uncoded and trellis-coded systems are evaluated in terms of their bit error rate (BER), degree of prioritization, and decoding complexity. Finally, applications to high-definition television (HDTV) broadcasting are considered, where a concatenated coding scheme is employed to provide the required performance levels
Keywords :
OFDM modulation; adjacent channel interference; computational complexity; concatenated codes; decoding; error statistics; fading channels; high definition television; time-varying channels; trellis coded modulation; video coding; BER; HDTV broadcasting; ICI; OFDM; bit error rate; carrier frequency offset; channel time variation; concatenated coding scheme; decoding complexity; frequency-selective fading channels; high-definition television; interchannel interference; multiresolution OFDM; multiresolution modulation; orthogonal frequency division multiplexing; performances; prioritization; trellis-coded systems; uncoded systems; AWGN; Antennas and propagation; Bit error rate; Concatenated codes; Frequency-selective fading channels; HDTV; Interchannel interference; OFDM modulation; Signal resolution; TV broadcasting;
Journal_Title :
Vehicular Technology, IEEE Transactions on
