Title :
On constant power water-filling
Author :
Yu, Wei ; Cioffi, John M.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA, USA
Abstract :
This paper derives a rigorous performance bound for the constant-power water-filling algorithm for ISI channels with multicarrier modulation and for i.i.d. fading channels with adaptive modulation. Based on the performance bound, a very-low complexity logarithm-free power allocation algorithm is proposed. Theoretical worst-case analysis and simulation show that the approximate water-filling scheme is close to optimal
Keywords :
Rayleigh channels; adaptive modulation; approximation theory; computational complexity; intersymbol interference; ISI; ISI channels; Rayleigh channel; adaptive modulation; approximate power adaptation algorithms; approximate water-filling scheme; constant-power water-filling algorithm; i.i.d. fading channels; intersymbol interference; logarithm-free power allocation algorithm; multicarrier modulation; performance bound; simulation; very-low complexity power allocation algorithm; worst-case analysis; Analytical models; Channel estimation; Communication channels; Discrete Fourier transforms; Fading; Intersymbol interference; Signal to noise ratio; State feedback; Statistics; Transmitters;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.937077
