Multipath doppler adjusted frequency tracking loop

A RAKE receiver comprising:

• a timing source;
• a plurality of finger timing adjustors for receiving signals and adjusting their timing in response to a plurality of adjustment signals to produce adjusted finger signals;
• a plurality of fingers for receiving said adjusted finger signals and calculating a plurality of frequency errors in relation to said timing source;
• a means for calculating a weighted average of said plurality of frequency errors;
• a timing adjustor for adjusting the timing of said timing source in response to said weighted average;
• and
• a plurality of summers for subtracting each of said plurality of frequency errors from said weighted average to produce a plurality of differences for connecting to said plurality of adjustment signals of said finger timing adjustors.

A RAKE receiver comprising:

• a timing source;
• a plurality of finger timing adjustors for receiving signals and adjusting their timing in response to a plurality of adjustment signals to produce adjusted finger signals;
• a plurality of fingers for receiving said adjusted finger signals and calculating a plurality of frequency errors in relation to said timing source and wherein said frequency errors are connected to said plurality of adjustment signals of said finger timing adjustors;
• a means for calculating a weighted average of said plurality of frequency errors;
• and
• a timing adjustor for adjusting the timing of said timing source in response to said weighted average.

A RAKE receiver comprising:

• a timing source;
• a plurality of finger timing adjustors for receiving signals and adjusting their timing in response to a plurality of adjustment signals to produce adjusted finger signals;
• a plurality of fingers for receiving said adjusted finger signals and calculating a plurality of frequency errors in relation to said timing source;
• a plurality of loop filters for filtering said frequency errors and for connecting said plurality of filtered frequency errors to said plurality of said finger timing adjustors as said plurality of adjustment signals;
• a means for calculating a first weighted average of said plurality of frequency errors;
• a means for calculating a second weighted average of said plurality of filtered frequency errors;
• a means for combining said first and second weighted averages to produce a timing adjustor signal;
• a timing adjustor for adjusting the timing of said timing source in response to said timing adjustor signal.

A method for frequency tracking in a RAKE receiver comprising the steps of:

• a) calculating a plurality of frequency of errors;
• b) adjusting timing for each of a plurality of fingers in response to ones of said plurality of frequency errors;
• c) computing a weighted average of said plurality of frequency errors, wherein the weight of each finger's frequency error is in proportion to a strength of each finger's pilot;
• and
• d) adjusting timing for the plurality of fingers in response to said weighted average.

A method for frequency tracking in a RAKE receiver comprising the steps of:

• a) calculating a plurality of frequency errors;
• b) filtering said plurality of frequency of errors to produce a plurality of filtered frequency errors;
• e) adjusting timing for each of a plurality of fingers in response to ones of said plurality of filtered frequency errors;
• f) computing a weighted average of said plurality of frequency errors;
• and
• g) adjusting timing for the plurality of fingers in response to said weighted average.

A method for frequency tracking in a RAKE receiver comprising the steps of:

• a) calculating a plurality of frequency errors;
• b) filtering said plurality of frequency of errors to produce a plurality of filtered frequency errors;
• c) adjusting timing for each of a plurality of fingers in response to ones of said plurality of filtered frequency errors;
• d) computing a first weighted average of said plurality of frequency errors;
• e) computing a second weighted average of said plurality of filtered frequency errors;
• f) summing said first and second weighted averages;
• and
• g) adjusting timing for the plurality of fingers in response to said weighted average.

A method for frequency tracking in a RAKE receiver comprising the steps of:

• a) calculating a plurality of frequency errors;
• b) computing a weighted average of said plurality of frequency errors;
• c) adjusting timing for the plurality of fingers in response to said weighted average;
• d) subtracting each of said plurality of frequency errors from said weighted average to produce a plurality of differences;
• e) filtering said plurality of differences to produce a plurality of filtered differences;
• f) adjusting timing for each of a plurality of fingers in response to ones of said plurality of filtered differences.