Block transform OFDM: A robust power and bandwidth efficient system with improved frequency diversity performance

Author

Xue, Xiaoliang ; Huang, Xiaojing

Author_Institution

Comput. & Telecommun. Eng. (SECTE), Univ. of Wollongong, Wollongong, NSW, Australia

fYear

2011

fDate

12-14 Oct. 2011

Firstpage

205

Lastpage

210

Abstract

Block transform orthogonal frequency division multiplexing (BT-OFDM) - a system sitting in-between two extreme data transmission schemes, i.e., the conventional OFDM system and the single-carrier system, with a balanced system performance is proposed in this paper. Through data symbol grouping and block transformation, the BT-OFDM uses reduced size inverse fast Fourier transform to take the advantages of the single-carrier system to overcome the disadvantages of the conventional OFDM system. Frequency domain representation of the BT-OFDM signal reveals that the block transformation implicitly realizes a precoding or block spreading of the transmitted data symbols. When suitable IFFT size is selected, the BT-OFDM also offers the lowest overall system complexity.

Keywords

OFDM modulation; data communication; fast Fourier transforms; inverse transforms; precoding; block transform OFDM; block transformation; data symbol grouping; data transmission; frequency diversity; inverse fast Fourier transform; precoding; robust bandwidth efficient system; robust power efficient system; single-carrier system; Discrete Fourier transforms; Frequency diversity; Frequency domain analysis; Manganese; Peak to average power ratio; Transmitters; OFDM; frequency diversity; frequency-selective channel; peak-to-average power ratio (PAPR);

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Information Technologies (ISCIT), 2011 11th International Symposium on

Conference_Location

Hangzhou

Print_ISBN

978-1-4577-1294-4

Type

conf

DOI

10.1109/ISCIT.2011.6089734

Filename

6089734