Semi-blind space-time chip equalizer receivers for WCDMA forward link with code-multiplexed pilot

In the forward link of WCDMA systems, the multipath propagation channel destroys the orthogonality of the spreading codes and therefore causes multi-user interference (MUI). We propose new training-based and semi-blind space-time chip equalizer receivers for the forward link of WCDMA systems with a continuous code-multiplexed pilot. Both least-squares (LS) algorithms for block processing and recursive least-squares (RLS) algorithms for adaptive processing are derived. The proposed receivers can track fast fading multipath channels and outperform the RAKE receiver with perfect channel knowledge.

[1]  Anja Klein,et al.  Data detection algorithms specially designed for the downlink of CDMA mobile radio systems , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.

[2]  Hui Liu,et al.  A new blind receiver for downlink DS-CDMA communications , 1999, IEEE Communications Letters.

[3]  H. De Man,et al.  Pilot-aided adaptive chip equalizer receiver for interference suppression in DS-CDMA forward link , 2000, Vehicular Technology Conference Fall 2000. IEEE VTS Fall VTC2000. 52nd Vehicular Technology Conference (Cat. No.00CH37152).

[4]  S. Chowdhury,et al.  Reduced-rank adaptive MMSE equalization for high-speed CDMA forward link with sparse multipath channels , 2000, Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154).

[5]  Arogyaswami Paulraj,et al.  A blind multiuser receiver for the CDMA downlink , 2000, 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100).

[6]  D. Slock,et al.  Linear receivers for the DS-CDMA downlink exploiting orthogonality of spreading sequences , 1998, Conference Record of Thirty-Second Asilomar Conference on Signals, Systems and Computers (Cat. No.98CH36284).