Title :
Improved channel estimation and demodulation for OFDM on HF ionospheric channels
Author_Institution :
Tech. Univ. Darmstadt, Germany
Abstract :
In this paper OFDM is analyzed on the HF ionospheric channel. The non-coherent DPSK modulation shows a high error floor and an improvement in performance can be achieved, if channel-estimation is improved. As pilot-based channel estimation would lower the throughput, decision-directed methods are presented and analyzed by simulation
Keywords :
HF radio propagation; OFDM modulation; demodulation; fading channels; ionospheric electromagnetic wave propagation; maximum likelihood detection; maximum likelihood sequence estimation; multipath channels; HF ionospheric channels; OFDM; channel estimation; decision-directed methods; demodulation; error floor; noncoherent DPSK; performance;
Conference_Titel :
HF Radio Systems and Techniques, 2000. Eighth International Conference on (IEE Conf. Publ. No. 474)
Conference_Location :
Guildford
Print_ISBN :
0-85296-727-6
DOI :
10.1049/cp:20000150
