Title :
Effect of chip shaping on the performance of band-limited multicarrier CDMA systems
Author_Institution :
Dept. of Electr. Eng., Saskatchewan Univ., Saskatoon, Sask., Canada
Abstract :
This paper investigates the effect of chip waveform shaping on the multiple access interference (MAI) in bandlimited multicarrier CDMA (MC-CDMA) systems. It is demonstrated that, compared to single carrier CDMA (SC-CDMA) systems, chip waveform shaping has much smaller influence on the performance of MC-CDMA systems. It is also shown that the optimum chip waveform for MC-CDMA systems is practically the same as that of a SC-CDMA system. A criterion for the performance comparison of different bandlimited chip waveforms based on the elementary density function is introduced. Finally, the effect of varying the roll-off factor of a bandlimited chip waveform on the MAI level is also investigated.
Keywords :
bandlimited communication; code division multiple access; interference suppression; mobile radio; spread spectrum communication; MAI; MC-CDMA; bandlimited multicarrier CDMA systems; chip waveform shaping; elementary density function; multiple access interference; performance; roll-off factor variation; Bandwidth; Degradation; Fast Fourier transforms; Interference; Multiaccess communication; Multicarrier code division multiple access; Shape; Transmitters;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2002 IEEE Seventh International Symposium on
Print_ISBN :
0-7803-7627-7
DOI :
10.1109/ISSSTA.2002.1049300
