Claims
- 1. A system that performs supplemental frequency domain training of a time domain equalizer comprising:
a training module that uses an initial solution for time domain equalizer coefficients and determines updated time domain equalizer coefficients by maximizing the number of bits per frame; and a time domain equalizer that receives the updated time domain equalizer coefficients.
- 2. The system of claim 1, wherein the supplemental training is performed during medley.
- 3. The system of claim 1, wherein the updated time domain equalizer coefficients are used during showtime.
- 4. The system of claim 1, wherein the training module receives a data matrix from an echo canceller.
- 5. The system of claim 1, wherein additional training is performed based on the updated time domain equalizer coefficients.
- 6. The system of claim 5, wherein the additional training comprises frequency domain equalizer training and signal to noise ratio measurements for bit loading.
- 7. The system of claim 1, wherein the system is located in one or more of a DSL, VDSL, SDSL, HDSL, HDSL2, discrete multi-tone, discrete wavelet multi-tone DSL or wireless OFDM system.
- 8. The system of claim 1, wherein the training module further determines a mean squared signal value for each bin, for the given time domain equalizer coefficients.
- 9. The system of claim 1, wherein the training module further determines an average error squared value over a predetermined number of frames for each bin.
- 10. The system of claim 1, further comprising using the updated time domain equalizer coefficients as the initial solution for time domain equalizer coefficients.
- 11. A method that performs supplemental frequency domain training of the time domain equalizer comprising:
receiving a solution of initial time domain equalizer coefficients; determining updated time domain equalizer coefficients by maximizing the number of bits per frame; and forwarding the updated time domain equalizer coefficients to a time domain equalizer.
- 12. The method of claim 11, wherein the supplemental training is commenced during medley.
- 13. The method of claim 11, further comprising determining a mean squared signal value for each bin, for the given time domain equalizer coefficients.
- 14. The method of claim 11, further comprising determining the average error squared value over a predetermined number of frames for each bin.
- 15. The method of claim 11, further comprising repeating the determining step using the updated time domain equalizer coefficients as the initial time domain equalizer coefficients.
- 16. The method of claim 11, further comprising estimating a channel frequency response.
- 17. The method of claim 11, wherein the updated time domain equalizer coefficients are used during showtime.
- 18. The method of claim 11, wherein the method is performed in one or more of a DSL, VDSL, SDSL, HDSL, HDSL2, discrete multi-tone, discrete wavelet multi-tone DSL or wireless OFDM system.
- 19. The method of claim 11, further comprising receiving a data matrix.
- 20. The method of claim 11, further comprising performing additional training is performed based on the updated time domain equalizer coefficients.
- 21. An information storage media comprising information that performs supplemental frequency domain training of the time domain equalizer comprising:
information that receives a solution of initial time domain equalizer coefficients; information that determines updated time domain equalizer coefficients by maximizing the number of bits per frame; and information that forwards the updated time domain equalizer coefficients to a time domain equalizer.
- 22. The information storage media of claim 21, wherein the supplemental training is commenced during medley.
- 23. The information storage media of claim 21, further comprising information that determines a mean squared signal value for each bin, for the given time domain equalizer coefficients.
- 24. The information storage media of claim 21, further comprising information that determines the average error squared value over a predetermined number of frames for each bin.
- 25. The information storage media of claim 21, further comprising information that repeats the determining step using the updated time domain equalizer coefficients as the initial time domain equalizer coefficients.
- 26. The information storage media of claim 21, further comprising information that estimates a channel frequency response.
- 27. The information storage media of claim 21, wherein the updated time domain equalizer coefficients are used during showtime.
- 28. The information storage media of claim 21, wherein the method is performed in one or more of a DSL, VDSL, SDSL, HDSL, HDSL2, discrete multi-tone, discrete wavelet multi-tone DSL or wireless OFDM system.
- 29. The information storage media of claim 21, further comprising information that receives a data matrix.
- 30. The information storage media of claim 21, further comprising information that performs additional training based on the updated time domain equalizer coefficients.
RELATED APPLICATION DATA
[0001] This application claims benefit of and priority to U.S. Application Serial No. 60/241,664 filed Oct. 19, 2000, entitled “Frequency Domain Supplemental Training of the Time Domain Equalizer for DMT,” which is incorporated herein by reference in its entirety.
Provisional Applications (1)
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Number |
Date |
Country |
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60241664 |
Oct 2000 |
US |