US 9,401,742 B2 · On cell/finger assignment for reduced cell delay spread

Abstract

Methods and apparatus for wireless communications are described. A method of wireless communications includes determining an energy for a first signal received at a first finger of a rake receiver after a reference signal is received at a second finger of the rake receiver, determining an energy for a second signal received at a third finger of a rake receiver before the reference signal is received at the second finger of the rake receiver, and selecting the first signal as a new reference signal when the energy of the first signal exceeds the energy of the second signal by a predefined threshold amount. In another aspect, a method includes assigning a signal received at a rake receiver to a finger of the rake receiver, and deassigning the finger if the signal has an energy level below a preselected lock threshold energy for a predefined time.

Claims30

Dependent claims

A method of wireless communications, comprising:

determining an energy for a first signal that is received at a first finger of a rake receiver after a second signal is received at a second finger of the rake receiver, wherein a cell associated with the second signal is selected as a reference cell;
determining an energy for a third signal received at a third finger of the rake receiver before the second signal is received at the second finger of the rake receiver;
and
selecting a cell associated with the first signal as the reference cell when the energy of the third signal exceeds the energy of the first signal by less than a predefined threshold amount.

1 more element

An apparatus for wireless communication, comprising:

one or more radio frequency front ends configured to receive a plurality of signals, the plurality of signals including multiple versions of a signal of interest;
a searcher configured to determine an energy level for each of the plurality of signals;
a rake receiver having a plurality of fingers;
and
a processor configured to:
determine an energy for a first signal that is received at a first finger of the rake receiver after a second signal is received at a second finger of the rake receiver, wherein a cell associated with the second signal is selected as a reference cell;
determine an energy for a third signal received at a third finger of the rake receiver before the second signal is received at the second finger of the rake receiver;
and
select a cell associated with the first signal as the reference cell when the energy of the third signal exceeds the energy of the first signal by less than a predefined threshold amount.

6 more elements

A non-transitory computer-readable storage medium, having instructions encoded thereon that, when executed by one or more processors in a processing circuit, cause the one or more processors to:

determine an energy of a first signal that is received at a first finger of a rake receiver after a second signal is received at a second finger of the rake receiver, wherein a cell associated with the second signal is selected as a reference cell;
and
select a cell associated with the first signal as the reference cell when the energy of a third signal exceeds the energy of the first signal by less than a predefined threshold amount, and when the third signal is received at a third finger of the rake receiver before the second signal is received at the second finger of the rake receiver.

Dependencies are inferred from the claim text.

On cell/finger assignment for reduced cell delay spread

Life of this patent

On cell/finger assignment for reduced cell delay spread

Life of this patent

Abstract

Claims30