A simple algorithm for the reduction of the peak power in a many carrier AM-OFDM signal

Author

Walambe, Anirudha ; Caggiano, Michael ; Evans, James ; Gajic, Zoran

Author_Institution

WINLAB, Rutgers Univ., USA

Volume

2

fYear

2001

fDate

4-7 Nov. 2001

Firstpage

1709

Abstract

There are no known techniques for the real-time generation of OFDM signals with low peak values when the number of carriers is large and the data rates are high. This paper presents an heuristic algorithm that reduces the peak power to mean power ratio of a 256 carrier AM-OFDM signal to typically less than 2.5 dB and always less than 4.2 dB. This algorithm can be implemented in real time using commercially available FFT/IFFT integrated circuits. Furthermore, AM-OFDM results in receiver simplification. The low peak power to mean power ratios achieved offset the S/N disadvantage of AM.

Keywords

OFDM modulation; amplitude modulation; mobile radio; radio receivers; FFT/lFFT integrated circuits; amplitude modulated OFDM; crest factor; heuristic algorithm; many-carrier AM-OFDM signal; orthogonal frequency division multiplexing; peak power to mean power ratio; real-time generation; receiver simplification; Amplitude modulation; Circuit testing; Heuristic algorithms; OFDM; Partial transmit sequences; Power generation; Resistors; Signal generators; Silicon compounds; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2001. Conference Record of the Thirty-Fifth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-7147-X

Type

conf

DOI

10.1109/ACSSC.2001.987776

Filename

987776