EFFICIENT COMPUTATION OF SOFT SCALING FACTORS FOR LINEAR MULTI-USER DETECTOR

摘要

A symbol detector (30) converts initial symbol estimates of received symbols to soft estimates for decoding. The symbol detector (30) computes spreading waveform correlations between a spreading waveform for a symbol of interest and spreading waveforms for one or more interfering symbols. Interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating for noise. A soft scaling factor for the symbol of interest is computed from the interference rejection terms. The soft scaling factors are then applied to the initial symbol estimates to generate the soft estimates.