Detection of high velocity movement in a telecommunication system
First Claim
1. A method of detecting that a relative velocity between a transmitter and a receiver in a telecommunications system is higher than a predetermined amount, the method comprising:
- using a Doppler estimation technique to generate an estimate of Doppler spread, {circumflex over (f)}D(1), based on a received signal;
using an alternative velocity estimation technique to generate an estimate of velocity, {circumflex over (v)}, based on the received signal, wherein the alternative velocity estimation technique differs from the Doppler estimation technique; and
using a plurality of estimates to detect whether the relative velocity between the transmitter and the receiver is higher than the predetermined amount, wherein the plurality of estimates includes at least the estimate of Doppler spread and the estimate of velocity.
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Abstract
Whether relative velocity between a transmitter and a receiver is higher than a predetermined amount is detected. This involves using a Doppler estimation technique to generate an estimate of Doppler spread, {circumflex over (f)}D(1), based on a received signal, and using an alternative velocity estimation technique to generate an estimate of velocity, {circumflex over (v)}, based on the received signal, wherein the alternative velocity estimation technique differs from the Doppler estimation technique. A plurality of estimates, including at least the estimate of Doppler spread and the estimate of velocity, are used to detect whether the relative velocity between the transmitter and the receiver is higher than the predetermined amount. The alternative velocity estimation technique may, for example, be a second Doppler estimation technique that differs from the other Doppler estimation technique.
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Citations
34 Claims
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1. A method of detecting that a relative velocity between a transmitter and a receiver in a telecommunications system is higher than a predetermined amount, the method comprising:
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using a Doppler estimation technique to generate an estimate of Doppler spread, {circumflex over (f)}D(1), based on a received signal; using an alternative velocity estimation technique to generate an estimate of velocity, {circumflex over (v)}, based on the received signal, wherein the alternative velocity estimation technique differs from the Doppler estimation technique; and using a plurality of estimates to detect whether the relative velocity between the transmitter and the receiver is higher than the predetermined amount, wherein the plurality of estimates includes at least the estimate of Doppler spread and the estimate of velocity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for detecting that a relative velocity between a transmitter and a receiver in a telecommunications system is higher than a predetermined amount, the apparatus comprising:
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a Doppler estimator that generates an estimate of Doppler spread, {circumflex over (f)}D(1), based on a received signal; an alternative velocity estimator that generates an estimate of velocity, {circumflex over (v)}, based on the received signal; and logic that uses a plurality of estimates to detect whether the relative velocity between the transmitter and the receiver is higher than the predetermined amount, wherein; the plurality of estimates includes at least the estimate of Doppler spread and the estimate of velocity; the Doppler estimator uses a Doppler estimation technique; the alternative velocity estimator uses an alternative velocity estimation technique; and the Doppler estimation technique differs from the alternative velocity estimation technique. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification