Title :
Pulse-shaping OFDM/BFDM systems for time-varying channels: ISI/ICI analysis, optimal pulse design, and efficient implementation
Author :
Schafhuber, Dieter ; Matz, Gerald ; Hlawatsch, Franz
Author_Institution :
Inst. of Commun. & Radio-Frequency Eng., Vienna Univ. of Technol., Austria
Abstract :
This paper considers practically relevant aspects and advantages of pulse-shaping orthogonal/biorthogonal frequency division multiplexing (OFDM/BFDM) systems. We analyze the intersymbol/intercarrier interference (ISI/ICI) in such systems when they operate over time-varying channels. Two methods for an ISI/ICI-minimizing pulse design are proposed, and efficient FFT-based modulator and demodulator implementations are presented. Simulations show that for fast time-varying channels, optimized BFDM systems can outperform conventional OFDM systems with respect to ISI/ICI.
Keywords :
OFDM modulation; demodulators; fast Fourier transforms; intersymbol interference; modulators; optimisation; pulse shaping; signal synthesis; time-varying channels; ISI/ICI analysis; OFDM systems; biorthogonal frequency division multiplexing; efficient FFT-based demodulator; efficient FFT-based modulator; efficient digital implementation; intercarrier interference; intersymbol interference; optimal pulse design; orthogonal frequency division multiplexing; pulse-shaping OFDM/BFDM systems; simulations; time-varying channels; Demodulation; Design engineering; Electronic mail; Intersymbol interference; OFDM modulation; Power system modeling; Pulse modulation; Radio frequency; Scattering; Time-varying channels;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on
Print_ISBN :
0-7803-7589-0
DOI :
10.1109/PIMRC.2002.1045180
