Subspace blind detection of asynchronous CDMA signals in multipath channels
Yu Song, Sumit Roy · 2003
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.