Title :
Multistage interference cancellation in multirate DS/CDMA on a mobile radio channel
Author :
Johansson, Ann-Louise ; Svensson, Arne
Author_Institution :
Dept. of Inf. Theory, Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
A novel hybrid interference cancellation (IC) scheme is proposed for the uplink of multirate direct-sequence code division multiple access (DS/CDMA) systems communicating over mobile radio channels. The hybrid IC scheme includes both non-decision directed and decision directed IC, joined together with a modified RAKE combiner for utilization of the diversity. The performance is evaluated via computer simulations for two multiple data rate schemes, mixed modulation and parallel channels, in a multipath environment. Both the case of known channel parameters and channel estimation using pilot symbols are considered. An analytical performance assessment is also given using a Gaussian approximation
Keywords :
Gaussian channels; Rayleigh channels; code division multiple access; diversity reception; interference suppression; land mobile radio; multipath channels; pseudonoise codes; quadrature amplitude modulation; radiofrequency interference; spread spectrum communication; Gaussian approximation; QAM; channel estimation; channel parameters; diversity; hybrid interference cancellation; mixed modulation; mobile radio channel; modified RAKE combiner; multipath environment; multiple data rate schemes; multirate DS/CDMA; multirate direct-sequence code division multiple access; multistage interference cancellation; parallel channels; performance assessment; pilot symbols; AWGN; Detectors; Fading; Hybrid integrated circuits; Information theory; Interference cancellation; Land mobile radio; Multiaccess communication; Multipath channels; Multiple access interference;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.501395
