Compensating for frequency shift and timing shift in frequency and time tracking loops based on mobile unit velocity
First Claim
1. A method of adjusting a communication receiver, the method comprising:
- receiving multipath signals at a rake receiver;
determining a velocity, from GPS data, of a wireless communication device in relation to a wireless network infrastructure; and
determining one or more adjustments to the operation of the communication receiver, using the multipath signal s, based on the determined velocity of the wireless communication device.
1 Assignment
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Accused Products
Abstract
A method and apparatus are provided for adjusting a communication receiver based on the velocity of a wireless communication device in relation to a base station. The receiver is adjusted by estimating a frequency shift of a communication signal transmitted between the base station and the wireless communication device (WCD) based on the WCD velocity. Using this estimate, adjustments are made to the communication receiver to account for the frequency shift of the communication signal. Adjustments to the receiver can include adjusting frequency and time tracking loops to account for the change in frequency of a signal received by, and from, the WCD as it moves relative to the base station. The receiver may be located in the WCD, or in the network infrastructure, or in both.
21 Citations
47 Claims
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1. A method of adjusting a communication receiver, the method comprising:
receiving multipath signals at a rake receiver; determining a velocity, from GPS data, of a wireless communication device in relation to a wireless network infrastructure; and determining one or more adjustments to the operation of the communication receiver, using the multipath signal s, based on the determined velocity of the wireless communication device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of adjusting a communication receiver, the method comprising:
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receiving multipath signals at a rake receiver; determining, from GPS data, one or more adjustments to the operation of the communication receiver, using the multipath signals, based on a velocity of a wireless communication device in relation to a wireless network infrastructure; and adjusting the communication receiver in accordance with the determined adjustments. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29. A wireless communication device comprising:
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a rake receiver configured to receive communication signals, including GPS data, from a base station; and a controller configured to receive a velocity of the wireless communication device, as determined using the GPS data, and to determine adjustments to be made to the receiver. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37)
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38. A wireless network infrastructure comprising:
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a rake receiver configured to receive communication signals including GPS data, from at least one wireless communication device; and a controller configured to receive the wireless communication device velocity, as determined using the GPS data, and to determine adjustments to be made to the receiver. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47)
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Specification