Title :
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
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);
Conference_Titel :
Communications and Information Technologies (ISCIT), 2011 11th International Symposium on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4577-1294-4
DOI :
10.1109/ISCIT.2011.6089734
