CDMA receiver performing a path search, path search method, and program therefor
AssigneeNEC Corporation
InventorKenji Terao
Life of this patent
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Abstract
In a path search method, all regions of a delay profile subject to peak detection are divided into a plurality of regions, and a control is performed so as to assign a searching frequency to each regions, which is higher the higher is the total peak power of the path existing in the region. A CDMA receiver in which this path search method is implemented has a region data separating section, which separates region data, a peak position detection section, which detects a peak position of each region, a region index calculation section, which establishes and manages the priorities of each region, and a region designating calculation section, which specifies a region for the region data separating section as a region having a high priority.
Claims15
A CDMA receiver performing a path search by searching with a prescribed timing a delay profile indicating a signal power distribution with respect to delay times of received signals, comprising:
- a separating means, which divides said delay profile into a plurality of regions, based on said delay time, and which selects at least one of said regions at the respective timings as a designated object for a signal power detection;
- a detection means, which performs a signal power detection within said selected region, and determines a signal power distribution condition;
- a priority establishing means, which establishes a priority of a region in response to said signal power distribution condition;
- and
- a region designation means, which designates a region to be selected in said separating means as an object for said signal power detection so that the higher priority a region possessing, with the higher frequency can be designated.
A method for path searching for a CDMA receiver whereby a path is detected by searching at a prescribed timing for a delay profile indicating a signal power distribution with respect to a delay time of received signal, said method comprising:
- dividing said delay profile into a plurality of regions, based on said delay time, and selecting at least one said regions at each of said timings as a designated object for a signal power detection;
- searching and detecting a signal power within said selected region, and determining a signal power distribution condition;
- establishing a priority of a region in response to said signal power distribution condition;
- and
- designating a region to be selected as an object for detecting said signal power so that the higher priority a region processing possessing, with the higher frequency can be designated.
A CDMA receiver comprising:
- a delay profile measuring section for measuring a delay profile indicating a signal power distribution with respect to delay time of received signals;
- a path search section for searching with a prescribed timing said delay profile;
- a rake receiver section;
- and
- a finger section for passing data assigned by said path search section to said rake receiver section;
- wherein said path search section includes:
- a separating means, which divides said delay profile into a plurality of regions, based on said delay time, and which selects at least one of said regions at the respective timings as a designated object for a peak signal power detection;
- a detection means, which performs a peak signal power detection within said selected region, and determines a signal power distribution condition;
- a priority establishing means, which establishes a priority of a region in response to said peak signal power of said signal power distribution condition;
- and
- a region designation means, which designates a region to be selected in said separating means as an object for said peak signal power detection so that the higher priority a region possessing, with the higher frequency can be designated,
- wherein a peak signal power to be detected by said detection means is a total signal power of a plurality of signal peaks within said region.
A computer program for path searching for a CDMA receiver whereby a path is detected by searching at a prescribed timing for a delay profile indicating a signal power distribution with respect to delay time of received signals, said computer program comprising:
- dividing said delay profile into a plurality of regions, based on said delay time, and selecting at least one of said regions at each one of said timings as a designated object for a signal power detection;
- searching and detecting a signal power within said selected region, and determining a signal power distribution condition;
- establishing a priority of a region in response to said signal power distribution condition;
- and
- designating a region to be selected as an object for detecting said signal power so that the higher priority a region possessing, with the higher frequency can be designated.
Dependencies are inferred from the claim text.