Claims
- 1. In a RAKE receiver having at least one RAKE finger, a method of initializing said RAKE finger for demodulation of a symbol sequence received over a selected channel path of a multipath communication channel, said method comprising:
determining channel coefficients for said selected channel path; and initializing a channel estimate used by said RAKE finger with said determined channel coefficients.
- 2. The method of claim 1 wherein determining channel coefficients for said selected channel path comprises determining said channel coefficients based on a first correlation to a pilot channel.
- 3. The method of claim 2 further comprising initializing a phase estimate used by said RAKE finger for demodulation of said symbol sequence.
- 4. The method of claim 3 wherein initializing said phase estimate used by said RAKE finger comprises using a phase of said first correlation to said pilot channel as an initial phase estimate.
- 5. In a RAKE receiver having at least two RAKE fingers, a method of reinitializing a selected RAKE finger for demodulation of a symbol sequence, said method comprising using demodulation information for a first RAKE finger to initialize a second RAKE finger after said second RAKE finger is assigned a new delay.
- 6. The method of claim 5 wherein using said demodulation information for said first RAKE finger to initialize a second RAKE finger after said second RAKE finger is assigned a new delay comprises initializing said second RAKE finger with a channel estimate used by said first RAKE finger.
- 7. The method of claim 5 wherein using said demodulation information for said first RAKE finger to initialize a second RAKE finger after said second RAKE finger is assigned a new delay comprises initializing said second RAKE finger with a phase estimate used by said first RAKE finger.
- 8. A method for using a RAKE receiver having one or more RAKE fingers to demodulate a received signal:
assigning a first delay to a first RAKE finger; demodulating a received signal with said first RAKE finger based on said first delay; reassigning said first RAKE finger with a second delay; reinitializing demodulation information used by said first RAKE finger after reassigning said first RAKE finger with said second delay.
- 9. The method of claim 8 wherein reinitializing demodulation information used by said first RAKE finger after reassigning said first RAKE finger with said second delay comprises initializing a channel estimate used by said first RAKE finger to demodulate said received signal.
- 10. The method of claim 9 wherein initializing said channel estimate used by said first RAKE finger to demodulate said received signal comprises using a first correlation to a pilot channel as an initial channel estimate.
- 11. The method of claim 9 wherein initializing a channel estimate used by said first RAKE finger to demodulate said received signal comprises initializing said first RAKE finger with a channel estimate used by a second RAKE finger.
- 12. The method of claim 8 wherein reinitializing demodulation information used by said first RAKE finger after reassigning said first RAKE finger with said second delay comprises initializing a phase estimate used by said first RAKE finger to demodulate said received signal.
- 13. The method of claim 12 wherein initializing a phase estimate used by said first RAKE finger to demodulate said received signal comprises using a phase of a first correlation to a pilot channel as an initial phase estimate.
- 14. The method of claim 12 wherein initializing a phase estimate used by said first RAKE finger to demodulate said received signal, comprises initializing said first RAKE finger with a phase estimate used by a second RAKE finger.
- 15. A method of initializing a demodulator for demodulation of a symbol sequence received over a selected channel path of a multipath communication channel, said method comprising:
determining a channel information associated with said selected channel path; and initializing demodulation information used by said demodulator with said determined channel information.
- 16. The method of claim 15 wherein determining a channel information associated with said selected channel path comprises determining channel coefficients of said selected channel path.
- 17. The method of claim 16 wherein determining a channel information associated with said selected channel path comprises estimating said channel coefficients of said selected channel path based on a first correlation to a pilot channel.
- 18. The method of claim 15 wherein determining a channel information associated with said selected channel path comprises determining a phase of said selected channel path.
- 19. The method of claim 18 wherein determining a phase of said selected channel path comprises estimating the phase of the selected channel path based on a first correlation to a pilot channel.
REFERENCE TO COPENDING APPLICATION
[0001] This application is a divisional of U.S. patent application Ser. No. 09/168,233, filed Oct. 7, 1998 in the name of E. Sourour, G. Bottomley, and R. Ramesh, and entitled “Delay Searcher and Delay Trackers interaction for New Delays Assignment to Rake Fingers,” which application is hereby incorporated herein by reference in its entirety.
Divisions (1)
|
Number |
Date |
Country |
Parent |
09168233 |
Oct 1998 |
US |
Child |
10365857 |
Feb 2003 |
US |