Rake combining circuit and rake combining method
AssigneeKawasaki Microelectronics, Inc.
InventorHisashi Kondo
Life of this patent
Estimating the term…
Abstract
Not only an instantaneous pilot symbol value resulting from correcting a phase of one demodulated pilot symbol in response to phase deviation of the one pilot symbol but also a pilot symbol value resulting from correcting a phase of the same pilot symbol corresponding to the instantaneous pilot symbol value in response to averaged phase deviation of a plurality of demodulated receive pilot symbols is calculated. Further, weight factors are generated on the basis of a difference between the instantaneous pilot symbol value and the pilot symbol value, and the respective demodulated receive data is weighted by using the weight factors to combine the receive data.
Claims12
A RAKE combining circuit comprising:
- at least two fingers that are circuits for demodulating pilot symbols as well as receive data and outputting not only an instantaneous pilot symbol value resulting from correcting a phase of one demodulated pilot symbol itself in response to phase deviation of the one demodulated pilot symbol but also a pilot symbol value resulting from correcting a phase of the same pilot symbol corresponding to the instantaneous pilot symbol value in response to averaged phase deviation of a plurality of demodulated pilot symbols,
- a weight factor generation circuit for generating weight factors corresponding to demodulated receive data outputted from the respective fingers on the basis of a difference between the instantaneous pilot symbol value and the pilot symbol value, and
- a combiner for weighting and combining the demodulated receive data outputted from the respective fingers by using the weight factors outputted from the weight factor generation circuit.
A RAKE combining method comprising the steps of:
- calculating an instantaneous pilot symbol value resulting from correcting a phase of one demodulated pilot symbol in response to phase deviation of the one demodulated pilot symbol and a pilot symbol value resulting from correcting a phase of the same pilot symbol corresponding to the instantaneous pilot symbol value in response to averaged phase deviation of a plurality of demodulated pilot symbols;
- generating a weight factor corresponding to each demodulated receive data on the basis of a difference between the instantaneous pilot symbol value and the pilot symbol value;
- and
- weighting the respective demodulated receive data to combine the respective data by using the weight factors.
Dependencies are inferred from the claim text.