OFDM systems with subchannel power control under the two-ray multipath channel

Author

Kang, Hongku ; Hwang, Wooncheol ; Kim, Kiseon

Author_Institution

Dept. of Inf. & Commun., K-JIST, Kwangju, South Korea

Volume

6

fYear

2001

fDate

2001

Firstpage

1856

Abstract

We propose the OFDM system with a subchannel power control, which transmits data with a variable power for each subchannel based on the received SNR. The OFDM system, employing a subchannel power control with a grouping coefficient equal to 3, gives about 3 dB gain in E_b/N₀ compared with the OFDM system without the subchannel power control, for either coherent or noncoherent QPSK modulation under the two-ray multipath channel with the mean value of the second-ray´s attenuation coefficient equal to 0.3, for the required BER equal to 10^-5

Keywords

OFDM modulation; multipath channels; power control; quadrature phase shift keying; telecommunication control; 3 dB; BER; OFDM systems; attenuation coefficient; bit error rate; coherent QPSK modulation; grouping coefficient; noncoherent QPSK modulation; received SNR; subchannel power control; two-ray multipath channel; Bandwidth; Bit error rate; Control systems; Fading; Multipath channels; OFDM modulation; Power control; Power generation; Quadrature phase shift keying; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2001. ICC 2001. IEEE International Conference on

Conference_Location

Helsinki

Print_ISBN

0-7803-7097-1

Type

conf

DOI

10.1109/ICC.2001.937112

Filename

937112