1 May 2009 Comparative performance evaluation of code-spread OFDM
Author Affiliations +
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. In Code-Spread OFDM (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 evaluated using Hadamard, Vandermonde, and Discrete Cosine spreading and compared to standard OFDM.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Muthanna Al-Mahmoud, Muthanna Al-Mahmoud, Michael D. Zoltowski, Michael D. Zoltowski, } "Comparative performance evaluation of code-spread OFDM", Proc. SPIE 7349, Wireless Sensing and Processing IV, 734903 (1 May 2009); doi: 10.1117/12.818755; https://doi.org/10.1117/12.818755

Back to Top