
Proceedings Paper
An investigation of constant-envelope variations of OFDM waveforms for use on HF multipath fading channelsFormat | Member Price | Non-Member Price |
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Paper Abstract
Orthogonal Frequency Division Multiplexing (OFDM) has become a very popular technique for digital data
transmission on multipath fading channels due to its low computational complexity and simple equalization process.
However, the multipath component of these types of channels causes a phenomenon known as frequency selective
fading. This type of fading can severely degrade or completely eliminate the signal energy of many of the OFDM tones
producing an irreducible error rate, even when no noise is present. Consequently, most OFDM systems operating in
multipath fading environments utilize some form of forward error correction (FEC) and block interleaving. OFDM
waveforms which utilize FEC are usually referred to as coded OFDM (COFDM). One of the main drawbacks of OFDM
and COFDM waveforms is the very large peak power to average power ratio (PAR) which requires the use of very
linear power amplifiers (PA) and a large power back-off into the PA. In recent years there has been much interest in
creating constant-envelope variations of OFDM and COFDM waveforms in order to overcome the PAR drawback. This
paper will investigate constant-envelope (CE) variants of OFDM and COFDM waveforms for use on HF multipath
fading channels.
Paper Details
Date Published: 3 April 2008
PDF: 12 pages
Proc. SPIE 6980, Wireless Sensing and Processing III, 698002 (3 April 2008); doi: 10.1117/12.778307
Published in SPIE Proceedings Vol. 6980:
Wireless Sensing and Processing III
Sohail A. Dianat; Michael D. Zoltowski, Editor(s)
PDF: 12 pages
Proc. SPIE 6980, Wireless Sensing and Processing III, 698002 (3 April 2008); doi: 10.1117/12.778307
Show Author Affiliations
John Nieto, Harris Corp. (United States)
Published in SPIE Proceedings Vol. 6980:
Wireless Sensing and Processing III
Sohail A. Dianat; Michael D. Zoltowski, Editor(s)
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