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This paper presents a behavioural analysis of bandpass OFDM signals sampled and quantized by means of a sigma-delta A/D architecture. It describes the direct effects of sigma-delta modulation on OFDM signals with a variable number of subcarriers by measuring bit-error-rate degradations. Due to the Gaussian characteristic of OFDM signals, the study has been approached from a statistical point of view.

Effects of bandpass sigma-delta modulation on OFDM signals