Adaptive Kalman filtering for fast fading removal
First Claim
1. A data processing method for processing signal measurement data associated with a received radio signal, where the signal measurement data includes a fast fading component and a slow fading component, including using an adaptive Kalman filtering process to filter out the fast fading component of the signal measurement data.
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Accused Products
Abstract
An adaptive Kalman filtering method and apparatus are used to process signal measurement data associated with the received radio signal. The signal measurement data includes a fast fading component and a slow fading component. The adaptive Kalman filtering process filters out the fast fading component of the signal measurement data but preserves to a large extent the slow fading components. This approach significantly improves the accuracy of the signal strength estimation and fast fading removal while at the same time significantly reduces the number of actual data samples required to remove that fast fading from the signal measurement data. This relaxes the speed and density requirements of the signal measurements, which in turn save time and costs.
16 Citations
30 Claims
- 1. A data processing method for processing signal measurement data associated with a received radio signal, where the signal measurement data includes a fast fading component and a slow fading component, including using an adaptive Kalman filtering process to filter out the fast fading component of the signal measurement data.
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10. A method for use in filtering measurement data associated with received radio signals, comprising:
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processing the measurement data; from the processed measurement data, calculating an estimate of one or more filtering variables; Kalman filtering the measurement data using the estimated one or more filtering variables; and using the Kalman-filtered measurement data in managing a communications network. - View Dependent Claims (11, 12, 13, 14, 15)
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- 16. Apparatus for processing signal measurement data associated with a received radio signal, where the signal measurement data includes a fast fading component and a slow fading component, comprising an adaptive Kalman filtering processor configured to filter out the fast fading component of the signal measurement data.
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25. Apparatus for use in filtering measurement data associated with received radio signals, comprising:
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initial processing circuitry for processing the measurement data; calculating circuitry for calculating an estimate of one or more filtering variables from the processed measurement data; a Kalman filter for Kalman filtering the measurement data using the estimated one or more filtering variables; and an output terminal for providing the Kalman-filtered measurement data for use in one or more communications network management functions. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification