US 2003/0171136 A1 · Method of tracking finger assignment

Abstract

The present invention is a system and method of assigning a plurality of rake finger tracking units of a rake receiver. The rake receiver is applied in code division multipath access (CDMA) communication system for disposing multipath signal received from outside environment. The assigning system includes a searcher, a tracker, and an assigning management unit. The searcher is used for searching a plurality of path signals in a multipath signal, and then acquiring a plurality of corresponding searching time positions. The tracker includes a plurality of tracking units. Each of the tracking units has a corresponding predetermined tracking time position for tracking the position of the path signal. The assigning management unit is used for matching the plurality of searching time positions and the plurality of predetermined tracking time positions, then obtaining a plurality of combinations of matching pairs, and finding out the best matching pair from the plurality of combinations. The assigning management unit will also amends the predetermined tracking time positions of the rake finger tracking units according to the relationship of the searching time position and the predetermined tracking time position in the best matching pair, and accordingly reassigns the rake finger tracking units by their amended tracking time positions. Hence, the present invention can prevent the rake finger tracking units from repeatedly unnecessary reassignments and effectively improve the accuracy of the received signal.

Claims20

Dependent claims

A reassigning system for reassigning a plurality of tracking units of a wireless receiver for receiving a plurality of multipath signals in a predetermined time period to reconstruct correspondingly an original signal, the reassigning system comprising:

a searcher for searching a plurality of peaks in a multipath signal with a first predetermined resolution, and accordingly acquiring a plurality of corresponding searching time positions;
a tracker comprising the plurality of tracking units, each of the tracking units tracking a corresponding peak with a predetermined tracking time position and a second predetermined resolution wherein the second predetermined resolution is higher than the first predetermined resolution;
and
an assigning management unit comprising:
a matching module for matching the plurality of searching time positions and the plurality of predetermined tracking time positions by a predetermined matching process, and accordingly generating a plurality of combinations of matching pairs;
an estimating module for estimating the searching time position and the predetermined tracking time position in each combination of matching pairs by a predetermined estimating process, and accordingly generating an assigning value corresponding to the combination;
an assigning table for storing relationships of the plurality of searching time positions and the plurality of predetermined tracking time positions of the plural combinations of matching pairs, and storing the assigning value of the combination;
and
an assigning module for acquiring from the assigning table a smallest assigning value among the plural assigning values and a combination of matching pairs corresponding to the smallest assigning value;
wherein the assigning management unit reassigns the plurality of tracking units to track the plurality of path signals according to the relationship of the searching time positions and the predetermined tracking time positions in the acquired combination of matching pairs from the assigning module.

7 more elements

A reassigning method for reassigning a plurality of tracking units of a wireless receiver in a wireless communication system for receiving a plurality of multipath signals in a predetermined time period to reconstruct correspondingly an original signal, the reassigning method comprising:

searching a plurality of peaks in a multipath signal with a first predetermined resolution, and accordingly acquiring a plurality of corresponding searching time positions;
tracking a plurality of path signal with a plurality of corresponding predetermined tracking time positions and a second predetermined resolution wherein the second predetermined resolution is higher than the first predetermined resolution;
matching the plurality of searching time positions and the plurality of predetermined tracking time positions by a predetermined matching process, and accordingly generating a plurality of combinations of matching pairs;
estimating the searching time position and the predetermined tracking time position in each combination of matching pairs by a predetermined estimating process, and accordingly generating an assigning value corresponding to the combination;
acquiring a smallest assigning value among the plural assigning values and a combination of matching pairs corresponding to the smallest assigning value;
reassigning the plurality of tracking units to track the plurality of path signals according to the relationship of the searching time positions and the predetermined tracking time positions in the acquired combination of matching pairs from the assigning module.

3 more elements

Dependencies are inferred from the claim text.

Method of tracking finger assignment

Life of this patent

Method of tracking finger assignment

Life of this patent

Abstract

Claims20