RECEIVED COMMUNICATION SIGNAL PROCESSING METHODS AND COMPONENTS FOR WIRELESS COMMUNICATION EQUIPMENT

• US 20090325497A1
• Filed: 09/02/2009
• Published: 12/31/2009
• Est. Priority Date: 03/05/2003
• Status: Abandoned Application

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Bohnhoff, Peter
• Application Number:
  US12/552,650
• Publication Number:
  US 20090325497A1
• Time in Patent Office: Days
• US Class Current: 455/65
• CPC Class Codes: H04B 1/70735 Code identification H04B1/7083 takes precedence
• CPC Class Codes: H04B 1/70755 Setting of lock conditions, e.g. threshold
• CPC Class Codes: H04B 1/708 Parallel implementation
• CPC Class Codes: H04B 1/7083 Cell search, e.g. using a three-step approach
• CPC Class Codes: H04B 1/7113 Determination of path profile
• CPC Class Codes: H04B 1/7117 Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
• CPC Class Codes: H04B 17/364 Delay profiles
• CPC Class Codes: H04B 7/08 at the receiving station
• CPC Class Codes: H04J 13/10 Code generation
• CPC Class Codes: H04L 25/0212 of impulse response

Abstract

A method and apparatus for processing received wireless communications are provided. Power delay profiles (PDPs) including PDP elements are processed. Less than half of the PDP elements of each PDP are selected. The selected PDP elements are combined based on position, and the combined PDP elements are qualified for further signal processing to determine a received signal path associated with the PDP.

Claims

1. A method for use in wireless communication, the method comprising:

processing a plurality of power delay profiles (PDPs) that each include a plurality of PDP elements;

selecting less than half of the PDP elements of each PDP;

selectively combining the selected PDP elements based on a position of the PDP elements; and

qualifying the combined PDP elements for further signal processing to determine a received signal path of a signal associated with the PDPs.

2. The method of claim 1, wherein the selecting includes selecting PDP elements having a highest value among the PDP elements in each PDP.

3. The method of claim 1, wherein the selectively combining includes performing coherent combination;

further comprising;

computing a magnitude approximation for each combined PDP element.

4. The method of claim 1, wherein the selectively combining includes coherently combining the PDP elements, and noncoherently combining magnitude approximation values corresponding to the coherently combined PDP elements;

and the qualifying includes separately evaluating the coherently combined PDP elements and the noncoherently combined PDP elements.

5. The method of claim 1, wherein the selectively combining includes noncoherently combining the PDP elements where each PDP element includes a magnitude approximation of a coherent accumulation of sequential sets of signal samples.

6. The method of claim 1, wherein the selecting includes:

selecting a PDP element from a first group of PDPs;

selecting a corresponding PDP element from each of a plurality of other groups of PDP elements; and

selecting a non-corresponding PDP element.

7. The method of claim 6, wherein the selecting a PDP element from a first group includes selecting a PDP element having a highest value.

8. The method of claim 6, wherein the selecting a PDP element from a first group includes selecting such that less than one-quarter of the elements of a PDP are selected from each PDP in the first group.

9. The method of claim 1 further comprising:

interpolating groups of PDPs to provide a corresponding number of at least twice as many PDP elements at a clock speed of at least twice a sampling rate of a PDP production unit.