Open AccessAdaptive resource management for downlink OFDMA system with imperfect CSI
Author(s) -
Wang Zhuwei,
Liu Lihan
Publication year - 2014
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.2014.0025
Subject(s) - telecommunications link , imperfect , computer science , channel state information , orthogonal frequency division multiplexing , electronic engineering , orthogonal frequency division multiple access , channel (broadcasting) , frequency division multiple access , telecommunications , wireless , engineering , philosophy , linguistics
The effect of the imperfect channel state information (CSI) on the system performance of radio resource management is addressed for a downlink OFDMA system. Differing from the previous works, it is shown that the imperfect CSI introduces a signal‐and‐power dependent noise term, and then a new method is proposed to evaluate the utility function. Numerical simulations show that the signal‐and‐power dependent noise yields a non‐negligible degradation to the system performance.