Title :
Prolate spheroidal wave functions induce Gaussian chip waveforms
Author :
Jitsumatsu, Yutaka ; Kohda, Tohru
Author_Institution :
Dept. of Comput. Sci. & Commun. Eng., Kyushu Univ., Fukuoka
Abstract :
Slepianpsilas prolate spheroidal wave function (PSWF) is optimum in energy concentration within given frequency bandwidth and time-width. However it is not employed in communications mainly because its inter-symbol interference is unfavorable. We show that introducing Markovian spreading codes makes PSWF be a strong candidate for the chip waveform in CDMA systems. For design tractability, Gaussian waveform is recommended.
Keywords :
Markov processes; code division multiple access; codes; CDMA systems; Gaussian chip waveforms; Markovian spreading codes; energy concentration; inter-symbol interference; prolate spheroidal wave functions; Bandwidth; Delay effects; Eigenvalues and eigenfunctions; Filters; Frequency; Gaussian noise; Interference; Multiaccess communication; Signal to noise ratio; Wave functions;
Conference_Titel :
Information Theory, 2008. ISIT 2008. IEEE International Symposium on
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-2256-2
Electronic_ISBN :
978-1-4244-2257-9
DOI :
10.1109/ISIT.2008.4595210
