Amplitude Statistics for Polynomial Cancellation Coded Ofdm Signals
نویسندگان
چکیده
Polynomial cancellation coding (PCC) is a method of mapping data onto the subcarriers of OFDM which results in reduced sensitivity to frequency offset. [1] – [4]. In this paper it is shown that the amplitude statistics for PCC OFDM are different from ordinary OFDM and the statistics are not Gaussian. The results of simulations for OFDM and PCC OFDM are presented. It is shown that the signal statistics of PCC OFDM can be substantially improved by using a form of offset keying in which low index and high index subcarriers have different symbol periods.
منابع مشابه
Spectral analysis of OFDM signals and its improvement by polynomial cancellation coding
In orthogonal frequency division multiplexing (OFDM) systems, the subcarriers are generated by an inverse discrete Fourier transform (DFT). OFDM has a relatively slow spectral rolloff. In the literature, the spectra of these subcarriers are often represented by a sequence of sinc functions with the same polarity. This does not explain the intercarrier interference (ICI) cancellation properties ...
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