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Multilevel flash memories store more than one bit per storage cell and are further characterized by large word (page) sizes and very low target error rates. In this paper, a high-rate error control scheme is presented that uses inner trellis-coded modulation (TCM) for storing two bits per cell with five possible charge levels. The coded subset-label bits and the uncoded signal-label bits of TCM are...
We investigate the secrecy capacity of an ergodic fading wiretap channel in which the main channel is correlated with the eavesdropper channel. In this study, the full Channel State Information (CSI) is assumed, and thus the transmitter knows the channel gains of the legitimate receiver and the eavesdropper. By analyzing the resulting secrecy capacity we quantify the loss of the secrecy capacity due...
This paper investigates optimal puncturing and shortening distributions for nonbinary LDPC codes over the binary erasure channel (BEC). The analysis is done by means of density evolution and optimal distributions are found with differential evolution. We show that puncturing or shortening entire variable nodes results in bad performance; instead, for best performance, puncturing and shortening distributions...
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