Title :
An enhanced correlation matrix estimation scheme for blind adaptive MMSE receiver
Author :
Chen, Wanshi ; Mitra, Urbashi
Author_Institution :
Ericsson Wireless Commun., San Diego, CA, USA
Abstract :
An improved correlation matrix estimation scheme for blind adaptive MMSE receivers for DS-CDMA communications was proposed by Chen and Mitra (see IEEE Journal on Selected Areas on Communications, vol.19, p.1531-43, 2001). Blind adaptive MMSE receivers with the estimation scheme not only maintain the merit of robustness against fading, but achieve performance comparable to the training-sequence based adaptive MMSE receivers. This paper presents an enhanced version of the improved correlation matrix estimation scheme for blind adaptive MMSE detection, which results in a better convergence and tracking property and noticeably improved performance than the original scheme of Chen and Mitra. Theoretical analysis is performed for the flat fading case which predicts the advantages of the new scheme. Detailed computer simulations are also carried out to verify the performance of blind adaptive MMSE receivers with the new estimation scheme.
Keywords :
adaptive estimation; adaptive signal detection; code division multiple access; convergence of numerical methods; correlation methods; fading channels; least mean squares methods; matrix algebra; multipath channels; multiuser channels; radio receivers; spread spectrum communication; DS-CDMA communications; blind adaptive MMSE detection; blind adaptive MMSE receiver; blind adaptive estimation; computer simulations; convergence property; correlation matrix estimation; direct-sequence code-division multiple access; flat fading; matrix estimation; multipath fading; signal to interference ratio; tracking property; training-sequence based adaptive MMSE receivers; Binary phase shift keying; Computer errors; Computer simulation; Convergence; Fading; Multiaccess communication; Performance analysis; Robustness; Vectors; Wireless communication;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.996946