Title :
Multicarrier DS/SFH-CDMA systems
Author :
Wang, Jiangzhou ; Huang, Hu
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, China
fDate :
9/1/2002 12:00:00 AM
Abstract :
Multicarrier direct-sequence/slow-frequency-hopping (MC DS/SFH) code-division multiple-access (CDMA) systems are proposed, in which multiple carriers are modulated by the same DS waveform and hopped in frequency according to a random hopping pattern. The receiver dehops the received signal with the same pattern, provides RAKE receivers for each carrier, and combines the outputs with a maximal ratio combiner (MRC). The performance of the proposed system is investigated over a frequency-selective Rayleigh-fading channel and compared to that of the MC DS-CDMA systems. It is shown that for the same diversity order, the MC DS/SFH-CDMA systems are superior in reducing multiple-access interference (MAI) while preserving the good capability of narrowband interference suppression, when the system parameters are selected properly.
Keywords :
Rayleigh channels; code division multiple access; diversity reception; frequency hop communication; interference suppression; radio receivers; spread spectrum communication; DS-CDMA; MAI; MRC; RAKE receivers; Rayleigh-fading channel; direct-sequence code-division multiple-access; diversity order; frequency-selective channel; maximal ratio combiner; multicarrier CDMA; multiple-access interference; narrowband interference suppression; random hopping pattern; slow-frequency-hopping; Fading; Frequency; Interference suppression; Modulation coding; Multiaccess communication; Multipath channels; Multiple access interference; Narrowband; RAKE receivers; Rayleigh channels;
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2002.801758
