Title :
Sub-band adaptive pre-equalised OFDM transmission
Author :
Keller, T. ; Hanzo, L.
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Abstract :
Power-efficient pre-equalisation techniques for sub-band adaptive OFDM transmissions are proposed as an effective means of improving the overall system performance in fading time-dispersive channels. The effects of the time-variant channel are examined and it is shown that adaptive modulation techniques are well suited to pre-equalisation. A range of different throughput and different target bit error rate (BER) systems are designed, which exhibit different amplifier back-off requirements. For example, the 10%, 1% and 0.01% target BER candidate systems exhibit bits per symbol (BPS) throughputs of about 2, 3 and 3.8 around a channel SNR of 15 dB over the investigated 155 Mbps, 60 GHz propagation frequency wideband wireless asynchronous transfer mode (WATM) channel
Keywords :
OFDM modulation; adaptive equalisers; adaptive modulation; asynchronous transfer mode; broadband networks; dispersive channels; error statistics; fading channels; packet radio networks; time-varying channels; 15 dB; 155 Mbit/s; 60 GHz; BER; OFDM transmission; adaptive modulation; amplifier back-off requirements; bit error rate; channel SNR; fading time-dispersive channels; propagation frequency; sub-band adaptive pre-equalised transmission; system performance; throughput; time-variant channel; wideband WATM channel; wireless asynchronous transfer mode; Bit error rate; Demodulation; Fading; Modems; OFDM modulation; System performance; Throughput; Transfer functions; Transmitters; Wideband;
Conference_Titel :
Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th
Conference_Location :
Amsterdam
Print_ISBN :
0-7803-5435-4
DOI :
10.1109/VETECF.1999.797151
