Open AccessPower allocation for uplink SC‐FDMA systems with arbitrary input distribution
Author(s) -
Ahmad A.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2015.1779
Subject(s) - telecommunications link , power (physics) , computer science , distribution (mathematics) , electronic engineering , frequency division multiple access , electrical engineering , telecommunications , engineering , mathematics , orthogonal frequency division multiplexing , physics , channel (broadcasting) , quantum mechanics , mathematical analysis
Existing power allocation schemes for single‐carrier frequency division multiple access (SC‐FDMA) systems are based on the assumption of Gaussian inputs. However, in practical systems, the inputs belong to a set of finite symbol alphabets. In this reported work the power allocation problem in the uplink SC‐FDMA system with arbitrarily distributed finite power inputs is considered. An optimal solution to the problem is found by using the relationship between minimum mean‐square error and mutual information. Simulation results show that solution allocates power in accordance to the modulation scheme employed and achieves significant power saving compared to schemes that assume Gaussian inputs.