초록 ▼

A rake receiver with a finger for each of a plurality of multipath components displaced in time has provision for predicting short-term variations in the strength of each component and adapting the coefficients of each finger accordingly, thus reducing the error rate, particularly in high-data-rate

A rake receiver with a finger for each of a plurality of multipath components displaced in time has provision for predicting short-term variations in the strength of each component and adapting the coefficients of each finger accordingly, thus reducing the error rate, particularly in high-data-rate applications in a time-variant environment.

대표청구항 ▼

1. Improved radio receiving apparatus for receiving spread-spectrum radio signals transmitted on a radio channel, the signals including multipath components displaced in time, the apparatus comprising:at least one rake receiver having a plurality of fingers, each finger comprising a digital demodula

1. Improved radio receiving apparatus for receiving spread-spectrum radio signals transmitted on a radio channel, the signals including multipath components displaced in time, the apparatus comprising:at least one rake receiver having a plurality of fingers, each finger comprising a digital demodulator, delay means for delaying input to the digital demodulator, signal evaluation means for producing a quality estimate of signal input to the digital demodulator, and means for weighting output of the digital demodulator according to said quality estimate, a searcher for determining strength and transmission delay of each multipath component; and finger assignment means responsive to the searcher for assigning and deassigning multipath components to fingers of the rake receiver and for accordingly initializing the delay means in the fingers, the improvement comprising:prediction means in each finger of the rake receiver responsive to the signal evaluation means and for producing a prediction of signal quality for use as said quality estimate for weighting output of the digital demodulator.