Title :
Subspace blind detection of asynchronous CDMA signals in multipath channels
Author :
Song, Yu ; Roy, Sumit
Author_Institution :
Div. of Eng., Texas Univ., San Antonio, TX, USA
Abstract :
This paper presents a blind adaptive detector for asynchronous DS-CDMA in multipath channels. The receiver exploits the underlying subspace structure for recursive estimation of the desired signal vector, and eliminates the need of explicit channel or delay estimation. The detector is constrained to the signal subspace (hence reduced rank), leading to computational efficiency while also benefiting adaptive algorithm performance. It is also shown to be robust to over-estimation of the signal subspace dimension
Keywords :
adaptive signal detection; code division multiple access; computational complexity; multipath channels; receivers; recursive estimation; spread spectrum communication; adaptive algorithm; asynchronous CDMA signals; asynchronous DS-CDMA; blind adaptive detector; computational efficiency; multipath channels; receiver; recursive estimation; reduced rank; signal subspace dimension estimation; signal vector; subspace blind detection; subspace structure; Adaptive algorithm; Adaptive signal detection; Computational efficiency; Delay estimation; Detectors; Multiaccess communication; Multipath channels; Recursive estimation; Robustness; Subspace constraints;
Conference_Titel :
Signal Processing Advances in Wireless Communications, 1999. SPAWC '99. 1999 2nd IEEE Workshop on
Conference_Location :
Annapolis, MD
Print_ISBN :
0-7803-5599-7
DOI :
10.1109/SPAWC.1999.783009
