Title :
On the discrete cosine transform and OFDM systems
Author :
Mandyam, Giridhar D.
Author_Institution :
Nokia Res. Center, Irving, TX, USA
Abstract :
A method for using the discrete cosine transform (DCT) as an alternative to the discrete Fourier transform (DFT) for orthogonal frequency division multiplexing (OFDM) wireless transmission methods is presented. These transforms satisfy the cyclic convolution properties of the DFT when used with a symmetric extension. Analysis of intersymbol and intercarrier interference in OFDM systems reveals that under certain channel conditions, throughput is enhanced when using the DCT rather than the DFT.
Keywords :
OFDM modulation; adjacent channel interference; convolution; discrete cosine transforms; intersymbol interference; mobile radio; telecommunication traffic; DCT; OFDM systems; cyclic convolution; discrete cosine transform; intercarrier interference; intersymbol interference; orthogonal frequency division multiplexing; symmetric extension; throughput; wireless transmission methods; Convolution; Delay; Discrete Fourier transforms; Discrete cosine transforms; Discrete transforms; Drives; Intersymbol interference; OFDM modulation; Throughput; Wireless communication;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
Print_ISBN :
0-7803-7663-3
DOI :
10.1109/ICASSP.2003.1202700
