Adaptive Pilot Symbol Allocation Method and Apparatus
First Claim
1. In a wireless communication device, a method of estimating channel response comprising:
- estimating the channel response based on a reduced-density common pilot signal when the reduced-density common pilot signal is sufficient for estimating the channel response with a desired accuracy, the reduced-density common pilot signal comprising a plurality of regularly spaced common pilot symbols; and
estimating the channel response based on the reduced-density common pilot signal and one or more additional pilot symbols adaptively allocated to the wireless communication device when the reduced-density common pilot signal is insufficient for estimating the channel response with the desired accuracy.
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Accused Products
Abstract
According to one embodiment, a wireless communication device estimates channel response based on a reduced-density common pilot signal comprising a plurality of regularly spaced common pilot symbols when the reduced-density common pilot signal is sufficient for estimating the channel response with a desired accuracy. The wireless communication device estimates the channel response based on the reduced-density common pilot signal and one or more additional pilot symbols adaptively allocated to the wireless communication device when the reduced-density common pilot signal is insufficient for estimating the channel response with the desired accuracy.
22 Citations
26 Claims
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1. In a wireless communication device, a method of estimating channel response comprising:
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estimating the channel response based on a reduced-density common pilot signal when the reduced-density common pilot signal is sufficient for estimating the channel response with a desired accuracy, the reduced-density common pilot signal comprising a plurality of regularly spaced common pilot symbols; and estimating the channel response based on the reduced-density common pilot signal and one or more additional pilot symbols adaptively allocated to the wireless communication device when the reduced-density common pilot signal is insufficient for estimating the channel response with the desired accuracy. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless communication device comprising a baseband processor configured to:
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estimate channel response based on a reduced-density common pilot signal when the reduced-density common pilot signal is sufficient for estimating the channel response with a desired accuracy, the reduced-density common pilot signal comprising a plurality of regularly spaced common pilot symbols; and estimate the channel response based on the reduced-density common pilot signal and one or more additional pilot symbols adaptively allocated to the wireless communication device when the reduced-density common pilot signal is insufficient for estimating the channel response with the desired accuracy. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of adaptively altering pilot symbol density within a wireless communication system, comprising:
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transmitting a reduced-density common pilot signal comprising a plurality of regularly spaced common pilot symbols; determining whether a wireless communication device in communicative contact with the wireless communication system can estimate channel response with a desired accuracy based on the reduced-density common pilot signal; and allocating one or more additional pilot symbols to the wireless communication device when the wireless communication device cannot estimate the channel response with the desired accuracy based on the reduced-density common pilot signal. - View Dependent Claims (18, 19, 20, 21)
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22. A wireless communication device comprising a baseband processor configured to:
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generate a reduced-density common pilot signal comprising a plurality of regularly spaced common pilot symbols; determine whether a second wireless communication device in communicative contact with the first wireless communication device can estimate channel response with a desired accuracy based on the reduced-density common pilot signal; and allocate one or more additional pilot symbols to the second wireless communication device when the second wireless communication device cannot estimate the channel response with the desired accuracy based on the reduced-density common pilot signal. - View Dependent Claims (23, 24, 25, 26)
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Specification