... Scottland,June 2007.[7] K B. Png, X. Peng, and F. Chin, Performance studies of amulti-band OFDM system using a simplified LDPC code,” in Proceedings of the International Workshop on Ultra-WidebandSystems ... the probabilitydensity function of ξeff. Following the approach in [12], wehave to find the moment-generating function (MGF) and doinverse Laplace transform in order to obtain pξeff(x) and ... the denominator of (17). In such cases, partial fraction and higher-order inverse Laplace transform according to the obtained eigenvalues case by case.For example, in the case of 128-point FFT,...