Telecommunications – Transmitter and receiver at separate stations – Having measuring – testing – or monitoring of system or part
Reexamination Certificate
2006-01-31
2006-01-31
Nguyen, Lee (Department: 2682)
Telecommunications
Transmitter and receiver at separate stations
Having measuring, testing, or monitoring of system or part
C455S423000, C370S241000, C375S224000
Reexamination Certificate
active
06993293
ABSTRACT:
The invention provides a method of predicting the power of a received wireless signal (e.g. as received by a mobile device), the method having the steps of: sampling the power of the received wireless signal over an observation interval to obtain a series of values representative of the power of the received wireless signal over the observation interval; and extrapolating the series of values beyond the observation interval to predict the future power of the received wireless signal. In a preferred embodiment of the invention, the method has the steps of: sampling the power of the received wireless signal over an observation interval to obtain a first series of values representative of the power of the received wireless signal over the observation interval; performing an additive white gaussian noise smoothing operation on the first series of values to give a series of smoothed samples over the observation interval, and removing the bias due to the influence of the additive white gaussian noise; performing least mean squares curve fitting on the smoothed samples; fitting a second order polynomial curve to the smoothed samples; and extrapolating the fitted curve beyond the observation interval to predict the future power of the received wireless signal. Also provided are a wireless device (e.g. a mobile phone) having signal processing apparatus operable to perform such a method, and a wireless communications network including a plurality of such wireless devices.
REFERENCES:
patent: 2003/0026363 (2003-02-01), Stoter et al.
Tanskanen et al. Predictive Power Estimators in CDMA Closed Loop Power Control, Apr. 1998. Vo. 7803-4320, pp. 1091-1095.
Duel-Halen, “Long-Range Prediction of Fading Signals”, IEEE Signal Processing Magazine, May, 2000, pp 62-75.
Averin Ilya M
Bevan Damian
Ermolayev Victor T
Flaksman Alexander G
Barnes & Thornburg LLP
Nguyen Lee
Nortel Networks Limited
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