Circuit, method, and program in a CDMA communication system for quickly tracking a stable path

A path searching circuit employed in a CDMA (Code Division Multiple Access) communication system comprising:

• a weighting controlling means to monitor a change in a power level of a sample of each of two or more delay profiles to be used in same power adding processing in delay profile calculation for path search processes and to exercise a weighting control for assigning weight to a power level of a specified sample, according to a result from the monitoring;
• wherein a judgment as to whether said weighting control is exercised on a specified sample depends upon a number of samples of a candidate for said weighting control,
• wherein said weighting controlling means saves a sample whose power level exceeds a power threshold value as said candidate for said weighting control, and
• wherein said weighting controlling means, when the number of samples of said candidate for said weighting control is 1 (one), assigns negative weight to a power level of the sample, the negative weight being a weighting value less than 0 (zero).

A path searching circuit employed in a CDMA (Code Division Multiple Access) communication system comprising:

• a weighting controlling means to monitor a change in a power level of a sample of each of two or more delay profiles to be used in same power adding processing in delay profile calculation for path search processes and to exercise a weighting control for assigning weight to a power level of a specified sample, according to a result from the monitoring;
• wherein a judgment as to whether said weighting control is exercised on a specified sample depends upon a number of samples of a candidate for said weighting control,
• wherein said weighting controlling means saves a sample whose power level exceeds a power threshold value as said candidate for said weighting control, and
• wherein said weighting controlling means, when the number of samples of said candidate for said weighting control is two or more and when a difference in power levels among specified samples is a change threshold value or more, assigns negative weight to power levels of the two or more samples, the negative weight being a weighting value less than 0 (zero).

A path searching method employed in a CDMA (Code Division Multiple Access) communication system comprising:

• a weighting controlling step of monitoring a change in a power level of a sample of each of two or more delay profiles to be used in same power adding processing in delay profile calculation for path search processes and of exercising a weighting control for assigning weight to a power level of a specified sample according to a result from the monitoring;
• wherein a judgment as to whether said weighting control is exercised on a specified sample depends upon a number of samples of a candidate for said weighting control,
• wherein, in said weighting controlling step, a sample whose power level exceeds a power threshold is saved as said candidate for said weighting control, and
• wherein, in said weighting controlling step, when the number of samples of said candidate for said weighting control is 1 (one), negative weight is assigned to a power level of the sample, the negative weight being a weighting value less than 0 (zero).

A path searching method employed in a CDMA (Code Division Multiple Access) communication system comprising:

• a weighting controlling step of monitoring a change in a power level of a sample of each of two or more delay profiles to be used in same power adding processing in delay profile calculation for path search processes and of exercising a weighting control for assigning weight to a power level of a specified sample according to a result from the monitoring;
• wherein a judgment as to whether said weighting control is exercised on a specified sample depends upon a number of samples of a candidate for said weighting control,
• wherein, in said weighting controlling step, a sample whose power level exceeds a power threshold is saved as said candidate for said weighting control, and
• wherein, in said weighting controlling step, when the number of samples of said candidate for said weighting control is two or more and when a difference in power levels among specified samples is a change threshold value or more, negative weight is assigned to power levels of the two or more samples, the negative weight being a weighting value less than 0 (zero).

A computer readable medium storing a path searching program for having a computer execute a path searching method employed in a CDMA (Code Division Multiple Access) communication system comprising:

• a weighting controlling step of monitoring a change in a power level of a sample of each of two or more delay profiles to be used in same power adding processing in delay profile calculation for path search processes and of exercising a weighting control for assigning weight to a power level of a specified sample according to a result from the monitoring;
• wherein a judgment as to whether said weighting control is exercised on a specified sample depends upon a number of samples of a candidate for said weighting control,
• wherein, in said weighting controlling step, a sample in which its power level exceeds a power threshold is saved as said candidate for said weighting control, and
• wherein, in said weighting controlling step, when the number of samples of said candidate for said weighting control is 1 (one), negative weight is assigned to a power level of the sample, the negative weight being a weighting value less than 0 (zero).

A computer readable medium storing a path searching program for having a computer execute a path searching method employed in a CDMA (Code Division Multiple Access) communication system comprising:

• a weighting controlling step of monitoring a change in a power level of a sample of each of two or more delay profiles to be used in same power adding processing in delay profile calculation for path search processes and of exercising a weighting control for assigning weight to a power level of a specified sample according to a result from the monitoring;
• wherein a judgment as to whether said weighting control is exercised on a specified sample depends upon a number of samples of a candidate for said weighting control,
• wherein, in said weighting controlling step, a sample in which its power level exceeds a power threshold is saved as said candidate for said weighting control, and
• wherein, in said weighting controlling step, when the number of samples of said candidate for said weighting control is two or more and when a difference in power levels among specified samples is a change threshold value or more, negative weight is assigned to power levels of the two or more samples, the negative weight being a weighting value less than 0 (zero).