Title :
Adaptive resource management for downlink OFDMA system with imperfect CSI
Author :
Zhuwei Wang ; Lihan Liu
Author_Institution :
Dept. of Electr. & Eng., Columbia Univ. in the City of New York, New York, NY, USA
Abstract :
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.
Keywords :
OFDM modulation; frequency division multiple access; numerical analysis; adaptive resource management; downlink OFDMA system; imperfect CSI; imperfect channel state information; numerical simulation; signal-and-power dependent noise term; utility function evaluation;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.0025