Title :
Multi-rate multi-code CDMA using FWT for mobile and personal communications
Author :
Madkour, Mohamed F. ; Gupta, Someshwar C.
Author_Institution :
Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA
Abstract :
We simulate a flexible direct sequence-code division multiple access (DS-CDMA) multi-rate system that uses a serial variable processing gain PN modulation together with multi-code modulation. The advantage of serial transmission is that only one waveform is transmitted at a given time resulting in a constant envelope transmission. Multi-code modulation provides a reliable high-speed data communications by using the fast Walsh transform (FWT). The performance of the proposed system is evaluated using computer simulation of different groups of data rates through a frequency selective Rayleigh multipath fading channel
Keywords :
Rayleigh channels; Walsh functions; code division multiple access; data communication; land mobile radio; modulation coding; multipath channels; multiuser channels; personal communication networks; pseudonoise codes; spread spectrum communication; transforms; DS-CDMA; FWT; computer simulation; constant envelope transmission; data rates; direct sequence-code division multiple access; fast Walsh transform; frequency selective Rayleigh multipath fading channel; mobile communications; multi-code modulation; multi-rate multi-code CDMA; personal communications; reliable high-speed data communications; serial transmission; serial variable processing gain PN modulation; system performance; waveform transmission; Bit rate; Computer simulation; Data communication; Fading; Frequency; Gain; Multiaccess communication; Multimedia communication; Multimedia systems; Transmitters;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1998. The Ninth IEEE International Symposium on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4872-9
DOI :
10.1109/PIMRC.1998.734669
