On the Derivation of Optimal Partial Successive Interference Cancellation

The necessity of accurate channel estimation for Successive and Parallel Interference Cancellation is well known. Iterative channel estimation and channel decoding (for instance by means of the Expectation-Maximization algorithm) is particularly important for these multiuser detection schemes in the presence of time varying channels, where a high density of pilots is necessary to track the channel. This paper designs a method to analytically derive a weighting factor $\alpha$, necessary to improve the efficiency of interference cancellation in the presence of poor channel estimates. Moreover, this weighting factor effectively mitigates the presence of incorrect decisions at the output of the channel decoder. The analysis provides insight into the properties of such interference cancellation scheme and the proposed approach significantly increases the effectiveness of Successive Interference Cancellation under the presence of channel estimation errors, which leads to gains of up to 3 dB.Comment: IEEE GLOBECOM 201

LT Code Design for Inactivation Decoding

We present a simple model of inactivation decoding for LT codes which can be used to estimate the decoding complexity as a function of the LT code degree distribution. The model is shown to be accurate in variety of settings of practical importance. The proposed method allows to perform a numerical optimization on the degree distribution of a LT code aiming at minimizing the number of inactivations required for decoding.Comment: 6 pages, 7 figure

Miguel de Unamuno: «Teresa»

Producción CientíficaLeido como colecci6n de poemas, Teresa es un anacronismo en 1923, y una anomalia en la escritura unamuniana. Leido, sin embargo, como novela (tal y com aquí se propone) el texto de Teresa no solo conecta plenamente con el experimentalismo narrativo de la epoca, sino que nos revela una gran densidad de significado

"Lo que soy, los que he sido"... o las varias formas de "escribir al revés"

Producción CientíficaFormando parte de una antología de estudios en torno a la poesía de Francisco Díaz de Castro, este estudio adopta la perspectiva de la estilometría para analizar los recursos propios de la obra de este autor