Method and apparatus for refining MIMO channel estimation using the signal field of the data frame
First Claim
1. A method to compensate for environmental factors experienced by a wireless signal during transmission between a transmitter and a receiver, comprising:
- receiving a wireless signal that includes a data frame having a preamble used to estimate a quantity relating to signal quality, wherein a portion of the preamble includes information specifying at least one parameter defining a format employed by the data frame;
decoding the selected portion of the preamble;
estimating a value for the quantity using the received preamble including the decoded selected portion thereof; and
demodulating a signal based at least in part on the estimated value of the quantity.
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Accused Products
Abstract
A method is provided to compensate for environmental factors experienced by a wireless signal during transmission between a transmitter and a receiver. The method begins by receiving a wireless signal that includes a data frame having a preamble used to estimate a quantity (e.g., a channel transfer function) relating to signal quality. A portion of the preamble includes information specifying at least one parameter defining a format employed by the data frame. The selected portion of the preamble is decoded and a value for the quantity is estimated using the received preamble, including the decoded selected portion thereof. A signal is demodulated based at least in part on the estimated value of the quantity.
30 Citations
20 Claims
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1. A method to compensate for environmental factors experienced by a wireless signal during transmission between a transmitter and a receiver, comprising:
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receiving a wireless signal that includes a data frame having a preamble used to estimate a quantity relating to signal quality, wherein a portion of the preamble includes information specifying at least one parameter defining a format employed by the data frame; decoding the selected portion of the preamble; estimating a value for the quantity using the received preamble including the decoded selected portion thereof; and demodulating a signal based at least in part on the estimated value of the quantity. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless receiver system, comprising:
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an antenna arrangement for receiving a wireless signal that includes a data frame having a preamble used to estimate a quantity relating to signal quality, wherein a selected portion of the preamble includes information specifying at least one parameter defining a format employed by the data frame; an A/D converter for converting the wireless signal into a digitized signal; a data demodulator for demodulating data embodied in the digitized signal and for decoding the selected portion of the preamble; a channel estimator for estimating a quantity relating to signal quality that is used by the data demodulator to demodulate the data, wherein the channel estimator is configured to estimate the value for the quantity using the received preamble including the decoded selected portion of the preamble. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. At least one computer-readable medium encoded with instructions which, when executed by a processor, performs a method including:
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receiving a wireless signal that includes a data frame having a preamble used to estimate a quantity relating to signal quality, wherein a portion of the preamble includes information specifying at least one parameter defining a format employed by the data frame; decoding the selected portion of the preamble; estimating a value for the quantity using the received preamble including the decoded selected portion thereof; and demodulating a signal based at least in part on the estimated value of the quantity. - View Dependent Claims (18, 19, 20)
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Specification