Title :
Frequency-time domain transmit power adaptation for a multicarrier system in fading channels
Author :
Jang, Jiho ; Lee, Kwang Bok ; Lee, Yong-Hwan
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
A multicarrier system, which is under consideration for high data rate transmission in the future, offers robustness to multipath fading in a wireless channel. We develop the optimal transmit power adaptation method to maximize the channel capacity of a multicarrier system, considering both frequency and time domains. The optimal transmit power adaptation policy with average transmit power constraint is found to be "water-pouring" in the frequency-time domain. We also show that the channel capacity with the frequency-time domain transmit power adaptation is greater than that with only the frequency domain transmit power adaptation
Keywords :
channel capacity; data communication; fading channels; multimedia communication; multipath channels; optimisation; power control; radio links; time-frequency analysis; time-varying channels; channel capacity; fading channels; frequency-time domain; high data rate transmission; multicarrier system; multipath fading; time-varying channel; transmit power adaptation; water-pouring; wireless channel; wireless multimedia services; Channel capacity; Data communication; Delay; Fading; Frequency domain analysis; Intersymbol interference; Power system modeling; Power system reliability; Robustness; Transmitters;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2001 12th IEEE International Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-7244-1
DOI :
10.1109/PIMRC.2001.965500
