System and method for the reacquisition of a gated pilot

• US 20040240476A1
• Filed: 05/31/2003
• Published: 12/02/2004
• Est. Priority Date: 05/31/2003
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Joshi, Abhay Arvind
• Granted Patent: US 7,760,765 B2
• Time in Patent Office: Days
• US Class Current: 370/500
• CPC Class Codes: H04B 1/70753 Partial phase search
• CPC Class Codes: H04B 2201/70701 featuring pilot assisted reception

Abstract

Systems and techniques are disclosed wherein a gated pilot signal can be re-acquired faster by searching a last known pilot offset and/or searching a last coset in which the last pilot signal was found.

Claims

1. A method of re-acquiring a gated pilot signal, comprising:

determining the gated pilot signal is lost; and

searching a last known pilot PN offset.

2. The method of claim 1, further comprising entering steady state operation if the gated pilot signal is found at the last known pilot PN offset.

3. The method of claim 1, further comprising searching a last coset in which the last pilot signal was found.

4. The method of claim 3, wherein searching a last coset in which the last pilot signal was found involves performing an entire PN sequence search within the last coset.

5. The method of claim 4, further comprising entering steady state operation if the gated pilot signal is found in the last coset in which the last pilot signal was found.

6. The method of claim 4, further comprising searching other cosets if the gated pilot signal is not found in the last coset in which the last pilot signal was found.

7. A method of re-acquiring a gated pilot signal, comprising:

determining the gated pilot signal is lost; and

searching a last coset in which the last pilot signal was found.

8. A method of re-acquiring a gated pilot signal, comprising:

determining the gated pilot signal is lost; and

searching a last coset in which the last pilot signal was found.

9. A receiver, comprising:

a searcher configured to search for a plurality of pilot signals; and

a processor coupled to the searcher and configured to select a pilot signal corresponding to the last known pilot PN offset.

10. A receiver, comprising:

a searcher configured to search for a plurality of pilot signals; and

a processor coupled to the searcher and configured to select a pilot signal from a last coset in which the last pilot signal was found.

11. A computer-readable medium embodying a program of instructions executable by a computer to perform a method of acquiring a gated pilot signal, the method comprising:

determining the gated pilot signal is lost; and

searching a last known pilot PN offset.

12. A computer-readable medium embodying a program of instructions executable by a computer to perform a method of acquiring a gated pilot signal, the method comprising:

determining the gated pilot signal is lost; and

searching a last coset in which the last pilot signal was found.