Claims
- 1. A method for determining the initial values of the tap weights for the taps of a linear equalizer comprising:
determining a channel impulse response of a channel; and, determining, from the channel impulse response, only values corresponding to the weights of the equalizer taps necessary to achieve optimum initialization of the equalizer.
- 2. The method of claim 1 wherein the determining of values comprises:
determining the number of dominant multi-paths characterizing the channel; and, performing a calculation to derive the values comprising a nested summation corresponding in number to the determined number.
- 3. The method of claim 2 wherein the outermost of the nested summation is performed over limits between 0 and the number of equalizer taps divided by the shortest delay characterizing the dominant multi-paths.
- 4. A method for determining values for the tap weights of the taps of a linear equalizer comprising:
determining a channel impulse response of a channel; and, performing a nested summation to determine from the channel impulse response only values corresponding to the weights of the equalizer taps necessary to achieve optimum initialization of the equalizer.
- 5. The method of claim 4 wherein the performing of a nested summation comprises determining the number of dominant multi-paths characterizing the channel, and wherein the nested summation has a number of summations equal to the number of multi-paths.
- 6. The method of claim 5 wherein the outermost of the summations is performed over limits between 0 and the number of equalizer taps divided by the shortest delay characterizing the dominant multi-paths.
- 7. The method of claim 4 wherein the performing of a nested summation comprises performing a nested summation based only on the channel impulse response.
- 8. The method of claim 7 wherein the performing of a nested summation comprises determining the number of dominant multi-paths characterizing the channel, and wherein the nested summation has a number of summations equal to the number of multi-paths.
- 9. The method of claim 8 wherein the outermost of the summations is performed over limits between 0 and the number of equalizer taps divided by the shortest delay characterizing the dominant multi-paths.
- 10. A method for determining values for the tap weights of the taps of a linear equalizer comprising:
cross-correlating data received over a channel with a representation of the data as they should have been received so as to produce a correlation vector, wherein the correlation vector is characterized by a known noise component resulting from the finiteness of the correlation; subtracting the known noise component from the correlation vector so as to produce a channel impulse response related to the channel; and, performing a nested summation to determine from the channel impulse response only values corresponding to the weights of the equalizer taps necessary to achieve optimum initialization of the equalizer.
- 11. The method of claim 10 wherein the performing of a nested summation comprises determining the number of dominant multi-paths characterizing the channel, and wherein the nested summation has a number of summations equal to the number of multi-paths.
- 12. The method of claim 11 wherein the outermost of the summations is performed over limits between 0 and the number of equalizer taps divided by the shortest delay characterizing the dominant multi-paths.
- 13. The method of claim 10 wherein the performing of a nested summation comprises performing a nested summation based only on the channel impulse response.
- 14. The method of claim 13 wherein the performing of a nested summation comprises determining the number of dominant multi-paths characterizing the channel, and wherein the nested summation has a number of summations equal to the number of multi-paths.
- 15. The method of claim 14 wherein the outermost of the summations is performed over limits between 0 and the number of equalizer taps divided by the shortest delay characterizing the dominant multi-paths.
- 16. The method of claim 10 wherein the known noise component includes a middle data element having a substantially zero value.
- 17. The method of claim 16 wherein the known noise component is subtracted from the correlation vector with the zero data element of the correlation vector and the middle data element of the known noise component in alignment.
- 18. The method of claim 17 wherein a subsequent subtraction of the known noise component from the correlation vector is performed only if the next largest data element of the correlation vector exceeds a threshold value.
- 19. The method of claim 17 wherein a subsequent subtraction of the known noise component from the correlation vector is performed with the next largest data element of the correlation vector in alignment with the middle data element of the known noise component.
- 20. The method of claim 19 wherein the subsequent subtraction of the known noise component from the correlation vector is performed only if the next largest data element of the correlation vector exceeds a threshold value.
- 21. The method of claim 20 wherein the performing of a nested summation comprises determining the number of dominant multi-paths characterizing the channel, and wherein the nested summation has a number of summations equal to the number of multi-paths.
- 22. The method of claim 21 wherein the outermost of the summations is performed over limits between 0 and the number of equalizer taps divided by the shortest delay characterizing the dominant multi-paths.
- 23. The method of claim 20 wherein the performing of a nested summation comprises performing of a nested summation based only on the channel impulse response.
- 24. The method of claim 23 wherein the performing of a nested summation comprises determining the number of dominant multi-paths characterizing the channel, and wherein the nested summation has a number of summations equal to the number of multi-paths.
- 25. The method of claim 24 wherein the outermost of the summations is performed over limits between 0 and the number of equalizer taps divided by the shortest delay characterizing the dominant multi-paths.
RELATED APPLICATIONS
[0001] The present application claims the benefit of Provisional Application Serial No. 60/302,986 filed on Jul. 3, 2001.
Provisional Applications (1)
|
Number |
Date |
Country |
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60302986 |
Jul 2001 |
US |