DocumentCode :
2929491
Title :
Enhanced DS-CDMA uplink performance through base station polarization diversity and multistage interference cancellation
Author :
Correal, Keiyer S. ; Woerner, B.D.
Author_Institution :
Mobile & Portable Radio Res. Group, Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Volume :
4
fYear :
1998
fDate :
1998
Firstpage :
1905
Abstract :
In wireless communications systems, multipath fading and multiple access interference distort the received signal and cause significant degradation in system performance. By exploiting the intrinsic structure of multiple access interference, multiuser detection significantly improves performance and overcomes the near-far problem of the conventional DS-CDMA correlation receiver. In mobile environments, polarization rotation and decorrelation arise due to multiple reflections and scattering along the transmission path. Furthermore, in portable applications since hand-held terminals are often oriented inclined to the vertical, the energy radiated from the handset has components in both vertical and horizontal directions. Polarization diversity is thus a very practical alternative for providing diversity reception at the base station and mitigating the deleterious effects of multipath fading. This paper evaluates the uplink performance of a DS-CDMA system that incorporates multistage parallel interference cancellation, and takes advantage of polarization diversity at the base station. Results indicate that polarization diversity leads to performance improvement comparable to spatial diversity
Keywords :
code division multiple access; decorrelation; electromagnetic wave polarisation; fading channels; interference suppression; land mobile radio; multipath channels; multiuser channels; radio links; radio receivers; radiofrequency interference; signal detection; spread spectrum communication; DS-CDMA uplink performance; base station polarization diversity; correlation receiver; decorrelation; diversity reception; hand-held terminals; mobile environments; multipath fading; multiple access interference; multiple reflections; multiple scattering; multistage parallel interference cancellation; multiuser detection; near-far problem; polarization rotation; received signal distortion; spatial diversity; transmission path; wireless communications systems; Base stations; Degradation; Distortion; Fading; Multiaccess communication; Multiple access interference; Multiuser detection; Polarization; System performance; Wireless communication;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE
Conference_Location :
Sydney,NSW
Print_ISBN :
0-7803-4984-9
Type :
conf
DOI :
10.1109/GLOCOM.1998.775875
Filename :
775875
Link To Document :
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