| 摘要 |
For combining diversity path signals comprising symbols each modulated in accordance with one of a plurality of orthogonal (e.g. Walsh) functions, a d iversity combiner includes, for each path, a demodulator to demodulate each modulated signal symbol in accordance with a selected one of the orthogonal functions, a phas e estimator to estimate a phase rotation and amplitude of the diversity path signal from th e demodulated signal, and a complex signal multiplier to derotate the phase and weight the amplitude of the diversity path modulated signal in dependence upon the estimated phase r otation and amplitude. The combiner sums real parts of the phase-derotated and weighted modulated signals of the diversity paths, demodulates the combined signal in accordanc e with all of the orthogonal functions, and selects the maximum demodulated signal for eac h symbol thereby to determine for the symbol the selected one of the orthogonal funct ions.
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