Open AccessDependence of power amplifier backoff on resource allocation for non‐contiguous carrier aggregation
Author(s) -
Park C.S.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.1431
Subject(s) - intermodulation , resource allocation , amplifier , distortion (music) , power (physics) , computer science , function (biology) , telecommunications , physics , computer network , bandwidth (computing) , quantum mechanics , evolutionary biology , biology
The dependence of power amplifier (PA) backoff on resource allocation for non‐contiguous carrier aggregation is investigated. To be specific, assuming two non‐contiguous carriers, the power spectral density (PSD) of the third‐order intermodulation distortion (IM3) is approximated as a function of power allocation and PSD allocation. Based on the closed‐form expression, it is proven that the PSD of IM3 is maximised when the resource allocation is inversely proportional to the PSD allocation. The PA simulations verify that such resource allocation also maximises the PA backoff.