Title :
Reduced-periodicity subspace-based blind adaptive decorrelating and MMSE detectors for multirate CDMA
Author :
Rodoplu, Volkan ; Meng, Teresa H.
Author_Institution :
Dept. of Electr. Eng., Stanford Univ., CA, USA
Abstract :
We present reduced-periodicity subspace-based blind adaptive decorrelating and MMSE detectors for synchronous variable spreading length (VSL) multirate DS-CDMA systems. These detectors trade off the maximum attainable SIR (signal-to-interference-plus-noise ratio) and the convergence speed of the detector and are low-complexity alternatives to the blind decorrelating and MMSE detectors that process the multirate signal at the rate of the lowest-data-rate user. In addition, we present very simple subspace-based proofs of some key results obtained for dual-rate multiuser detectors
Keywords :
adaptive signal detection; code division multiple access; convergence of numerical methods; decorrelation; land mobile radio; least mean squares methods; multiuser channels; radiofrequency interference; spread spectrum communication; MMSE detector; blind adaptive decorrelating detector; computational complexity; convergence speed; dual-rate multiuser detectors; low-complexity detector; maximum attainable SIR; multirate DS-CDMA systems; multirate signal processing; reduced-periodicity subspace-based detector; signal-to-interference-plus-noise ratio; single-rate subspace-based detector; synchronous variable spreading length system; third generation wireless systems; Adaptive signal detection; Computational complexity; Convergence; Decorrelation; Delay; Detectors; Multiaccess communication; Physical layer; Signal processing; Streaming media;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on
Conference_Location :
Parsippany, NJ
Print_ISBN :
0-7803-6560-7
DOI :
10.1109/ISSSTA.2000.876495
