
Proceedings Paper
Carrier diversity via code spreaded OFDMFormat | Member Price | Non-Member Price |
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Paper Abstract
Orthogonal Frequency Division Multiplexing (OFDM) is a popular technique used to combat frequency selective
fading in multipath channels. When spectral nulls are present in the channel, they can severely degrade or cancel
out several OFDM tones, resulting in an irreducible error rate. Code-Spreaded OFDM (CS-OFDM) combines
the characteristics of OFDM and Code Division Multiple Access (CDMA) to create a more robust modulation
scheme which provides substantial performance improvements relative to standard OFDM. In CS-OFDM, each
sinewave carries a weighted sum of all the information symbols being transmitted in an OFDM block interval. In
this paper, an MMSE estimator is derived for each symbol for a number of cases, including when the number of
carriers is greater than the number of symbols. The performance of CS-OFDM is analyzed and shown to provide
substantial improvements relative to standard OFDM, especially in the latter case.
Paper Details
Date Published: 3 April 2008
PDF: 8 pages
Proc. SPIE 6980, Wireless Sensing and Processing III, 698004 (3 April 2008); doi: 10.1117/12.784456
Published in SPIE Proceedings Vol. 6980:
Wireless Sensing and Processing III
Sohail A. Dianat; Michael D. Zoltowski, Editor(s)
PDF: 8 pages
Proc. SPIE 6980, Wireless Sensing and Processing III, 698004 (3 April 2008); doi: 10.1117/12.784456
Show Author Affiliations
Muthanna Al-Mahmoud, Purdue Univ. (United States)
Michael D. Zoltowski, Purdue Univ. (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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