Title :
Uplink spatio-temporal interference rejection combining for WCDMA
Author :
Astély, David ; Artamo, Atte
Author_Institution :
Nokia Networks, Kista, Sweden
Abstract :
Uplink RAKE combining with receiver diversity for a WCDMA FDD radio link in the presence of interference is considered. Expressions for the correlation between interference of different fingers after despreading are presented. By taking the correlation into account when combining the fingers, interference can be rejected. Spatial interference rejection combining (IRC), which accounts only for spatial correlation of the interference, and spatio-temporal IRC, which accounts also for correlation between fingers with different delays, are compared for rejection of both narrowband and wideband external interference. External interference may stem from narrowband communication systems operating in the same or distant frequency bands and by spectral regrowth from wideband systems operating in adjacent bands
Keywords :
adjacent channel interference; cochannel interference; code division multiple access; diversity reception; interference suppression; mobile radio; radio links; radio receivers; spread spectrum communication; FDD radio link; WCDMA; adjacent bands; correlation; despreading; fingers; narrowband external interference; receiver diversity; spatio-temporal interference rejection combining; spectral regrowth; third-generation mobile radio; uplink RAKE combining; wideband external interference; Delay; Diversity reception; Fingers; Frequency; Interference; Multiaccess communication; Narrowband; RAKE receivers; Radio link; Wideband;
Conference_Titel :
Wireless Communications, 2001. (SPAWC '01). 2001 IEEE Third Workshop on Signal Processing Advances in
Conference_Location :
Taiwan
Print_ISBN :
0-7803-6720-0
DOI :
10.1109/SPAWC.2001.923916
