Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Power estimation in LTE systems with the general framework of standard interference mappings
 Institute of Electrical and Electronics Engineers IEEE; IEEE Signal Processing Society: IEEE Global Conference on Signal and Information Processing, GlobalSIP 2014. Vol.2 : Atlanta, Georgia, USA, 3  5 December 2014 Piscataway, NJ: IEEE, 2014 ISBN: 9781479970896 ISBN: 9781479970889 S.818822 
 Global Conference on Signal and Information Processing (GlobalSIP) <2, 2014, Atlanta/Ga.> 

 Englisch 
 Konferenzbeitrag 
 Fraunhofer HHI () 
Abstract
We devise novel techniques to obtain the downlink power inducing a given load in longterm evolution (LTE) systems, where we define load as the fraction of resource blocks in the timefrequency grid being requested by users from a given base station. These techniques are particularly important because previous studies have proved that the data rate requirement of users can be satisfied with lower transmit energy if we allow the load to increase. Those studies have also shown that obtaining the power assignment inducing a desired load profile can be posed as a fixed point problem involving standard interference mappings, but so far the mappings have not been obtained explicitly. One of our main contributions in this study is to close this gap. We derive an interference mapping having as its fixed point the power assignment inducing a desired load, assuming that such an assignment exists. Having this mapping in closed form, we simplify the proof of the aforementioned known results, and we also devise novel iterative algorithms for power computation that have many numerical advantages over previous methods.