TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Entropy and Channel Capacity under Optimum Power and Rate Adaptation over Generalized Fading Conditions

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut2162-2166
Sivumäärä5
JulkaisuIEEE Signal Processing Letters
Vuosikerta22
Numero11
DOI - pysyväislinkit
TilaJulkaistu - 1 marraskuuta 2015
OKM-julkaisutyyppiA1 Alkuperäisartikkeli

Tiivistelmä

Accurate fading characterization and channel capacity determination are of paramount importance in both conventional and emerging communication systems. The present work addresses the non-linearity of the propagation medium and its effects on the channel capacity. Such fading conditions are first characterized using information theoretic measures, namely, Shannon entropy, cross entropy and relative entropy. The corresponding effects on the channel capacity with and without power adaptation are then analyzed. Closed-form expressions are derived and validated through computer simulations. It is shown that the effects of nonlinearities are significantly larger than those of fading parameters such as the scattered-wave power ratio, and the correlation coefficient between the in-phase and quadrature components in each cluster of multipath components.