Speed detection method in communication system, receiver, network element and processor
First Claim
Patent Images
1. A speed detection method in a communication system, comprising:
- determining a predetermined number of frequency estimates;
determining an average of the frequency estimates for obtaining an averaged frequency offset;
unbiasing received samples and/or impulse response values using the averaged frequency offset;
calculating Doppler frequency estimates using the unbiased received samples and/or the impulse response values;
calculating selected second order statistics of the Doppler frequency estimates over a predetermined period;
estimating a maximum Doppler frequency based on the selected second order statistics;
calculating a speed of a communication system terminal using the maximum Doppler frequency.
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Abstract
The embodiment of the invention is related to a processor comprising, for example, means for determining a predetermined number of frequency estimates, means for determining an average of the frequency estimates for obtaining an averaged frequency offset, means for unbiasing received samples and/or impulse response values using the averaged frequency offset, means for calculating Doppler frequency estimates using the unbiased received samples and/or impulse response values and means for calculating selected second order statistics of the Doppler frequency estimates over a predetermined period.
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Citations
29 Claims
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1. A speed detection method in a communication system, comprising:
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determining a predetermined number of frequency estimates;
determining an average of the frequency estimates for obtaining an averaged frequency offset;
unbiasing received samples and/or impulse response values using the averaged frequency offset;
calculating Doppler frequency estimates using the unbiased received samples and/or the impulse response values;
calculating selected second order statistics of the Doppler frequency estimates over a predetermined period;
estimating a maximum Doppler frequency based on the selected second order statistics;
calculating a speed of a communication system terminal using the maximum Doppler frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A receiver comprising:
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means for determining a predetermined number of frequency estimates;
means for determining an average of the frequency estimates for obtaining an averaged frequency offset;
means for unbiasing received samples and/or impulse response values using the averaged frequency offset;
means for calculating Doppler frequency estimates using the unbiased received samples and/or the impulse response values;
means for calculating a selected second order statistics of the Doppler frequency estimates over a predetermined period;
means for estimating a maximum Doppler frequency based on the selected second order statistics;
means for calculating a speed of a communication system terminal using the maximum Doppler frequency. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A network element comprising:
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means for determining a predetermined number of frequency estimates;
means for determining an average of the frequency estimates for obtaining an averaged frequency offset;
means for unbiasing received samples and/or the impulse response values using the averaged frequency offset;
means for calculating Doppler frequency estimates using the unbiased received samples and/or impulse response values;
means for calculating selected second order statistics of the Doppler frequency estimates over a predetermined period;
means for estimating a maximum Doppler frequency based on the selected second order statistics;
means for calculating a speed of a communication system terminal using the maximum Doppler frequency.
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26. A processor comprising:
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means for determining a predetermined number of frequency estimates;
means for determining an average of the frequency estimates for obtaining an averaged frequency offset;
means for unbiasing received samples and/or impulse response values using the averaged frequency offset;
means for calculating Doppler frequency estimates using the unbiased received samples and/or the impulse response values;
means for calculating selected second order statistics of the Doppler frequency estimates over a predetermined period;
means for estimating a maximum Doppler frequency based on the selected second order statistics;
means for calculating a speed of a communication system terminal using the maximum Doppler frequency.
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27. A receiver configured to:
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determine a predetermined number of frequency estimates;
determine an average of the frequency estimates for obtaining an averaged frequency offset;
unbias received samples and/or impulse response values using the averaged frequency offset;
calculate Doppler frequency estimates using the unbiased received samples and/or the impulse response values;
calculate a selected second order statistics of the Doppler frequency estimates over a predetermined period;
estimate a maximum Doppler frequency based on the selected second order statistics;
calculate a speed of a communication system terminal using the maximum Doppler frequency.
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28. A processor configured to:
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determine a predetermined number of frequency estimates;
determine an average of the frequency estimates for obtaining an averaged frequency offset;
unbias received samples and/or impulse response values using the averaged frequency offset;
calculate Doppler frequency estimates using the unbiased received samples and/or the impulse response values;
calculate selected second order statistics of the Doppler frequency estimates over a predetermined period;
estimate a maximum Doppler frequency based on the selected second order statistics;
calculate a speed of a communication system terminal using the maximum Doppler frequency.
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29. A network element configured to:
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determine a predetermined number of frequency estimates;
determine an average of the frequency estimates for obtaining an averaged frequency offset;
unbias received samples and/or impulse response values using the averaged frequency offset;
calculate Doppler frequency estimates using the unbiased received samples and/or the impulse response values;
calculate selected second order statistics of the Doppler frequency estimates over a predetermined period;
estimate a maximum Doppler frequency based on the selected second order statistics;
calculate a speed of a communication system terminal using the maximum Doppler frequency.
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Specification