Doppler spread estimation
OwnerCarsten Juncker, Peter Toft +1inventors
InventorsCarsten Juncker, Peter Toft, Niels Jacob Sand Morch
Life of this patent
Estimating the term…
Abstract
The Doppler spread of a received signal is estimated from the derivative of the path transfer function envelope for the received signal. The estimated Doppler spread is used to estimate the speed of a mobile station.
Claims49
A method of estimating the Doppler spread of a radio signal, the method comprising
- receiving a radio signal;
- deriving a value for the derivative of the envelope of the path transfer function for said radio signal;
- and
- computing an estimate of the Doppler spread of said radio signal from said derivative value.
A method of estimating the speed of a mobile station in a wireless communication system, the method comprising:
- receiving a radio signal;
- deriving a value for the derivative of the envelope of the path transfer function for said radio signal;
- computing an estimate of the Doppler spread of said radio signal from said derivative value;
- and
- deriving a value for the speed of said mobile station from said Doppler spread estimate.
A method of estimating the speed of a mobile station in a wireless communication system, the method comprising:
- receiving a radio signal;
- deriving first and second values for the derivative of the envelope of said radio signal;
- computing first and second estimates of the Doppler spread of said radio signal from said derivative values;
- and
- deriving a value for the speed of said mobile station from said Doppler spread estimates.
A mobile station of a wireless communication network, the mobile station including radio receiver means for receiving a radio signal and outputting a baseband signal and processing means for processing said baseband signal, wherein the processing means is configured for estimating the Doppler spread of a radio signal by deriving a value for the derivative of the envelope of the path transfer function envelope of a radio signal, received by said radio receiver means, and computing an estimate of the Doppler spread of said radio signal from said derivative value.
A mobile station of a wireless communication network, the mobile station including radio receiver means for receiving a radio signal and outputting a baseband signal and processing means for processing said baseband signal, wherein the processing means is configured for estimating the speed of the mobile station by deriving a value for the derivative of the path transfer function envelope for a radio signal, received by said radio receiver means, computing an estimate of the Doppler spread of said radio signal from said derivative value and deriving a value for the speed of said mobile station from said Doppler spread estimate.
A mobile station of a wireless communication network, the mobile station including radio receiver means for receiving a radio signal and outputting a baseband signal and processing means for processing said baseband signal, wherein the processing means is configured for estimating the speed of the mobile station by deriving first and second values for the derivative of the envelope of the path transfer function envelope of a radio signal, received by said radio receiver means, computing first and second estimates of the Doppler spread of said radio signal from said derivative value and deriving a value for the speed of said mobile station from said Doppler spread estimates.
Dependencies are inferred from the claim text.