Semi-blind space-time chip equalizer receivers for WCDMA forward link with code-multiplexed pilot
F. Petré, Geert J. T. Leus, Marc Engels, Marc Moonen, Hillarie Man · 2002
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.