Title :
Interference subspace rejection in wideband CDMA: modes for mixed-power operation
Author :
Affes, Sofiene ; Hansen, Henrik ; Mermelstein, Paul
Author_Institution :
INRS-Telecommun., Quebec Univ., Montreal, Que., Canada
Abstract :
Multiuser CDMA detectors suppress interference to provide improved noise immunity, increased capacity, higher data rates and reduced precision requirements for power control. A new multiuser detector structure is formulated which offers a number of implementation modes ranging in performance from that of interference cancellation (IC) detectors to that of linear receivers, yet provides more attractive performance/complexity tradeoffs. It exploits both space and time diversities as well as the array-processing capabilities enabled by multiple antennas and carries out simultaneous channel and timing estimation, signal combining and interference rejection. The improved performance enables increased utilization of wideband CDMA networks, especially at high data rates
Keywords :
array signal processing; broadband networks; code division multiple access; diversity reception; interference suppression; multiuser channels; power control; radio networks; radio receivers; radiofrequency interference; signal detection; space-time adaptive processing; telecommunication control; timing; array-processing; channel estimation; high data rates; interference cancellation detector; interference subspace rejection; interference suppression; linear receivers; mixed-power operation; multiple antennas; multiuser CDMA detector; noise immunity; performance/complexity tradeoffs; power control; signal combining; space diversity; spatio-temporal array-receiver; time diversity; timing estimation; wideband CDMA networks; Detectors; Diversity reception; Integrated circuit noise; Interference cancellation; Interference suppression; Multiaccess communication; Noise cancellation; Noise reduction; Power control; Wideband;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.936995
