Protection of ranging sounding signals from physical level attacks
First Claim
1. A method for wireless communication, comprising:
- encoding a long training field of a sounding training signal, wherein the encoding comprises applying a phase rotation to the long training field;
configuring an extension field of the sounding training signal to include an indication of the encoding; and
transmitting the sounding training signal including the encoded long training field and the configured extension field.
1 Assignment
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Accused Products
Abstract
Generally, the described techniques provide for protection mechanisms for sounding training signals transmitted between wireless devices when performing ranging sounding estimation. For example, sounding training signals may be encoded to include a sequence of phase rotations or cyclic shifts to protect the sounding training signal from peer devices. In some cases, encoding information associated with a long training field (LTF) may be transmitted either before or after the LTF is transmitted. Additionally or alternatively, a time delay may be introduced to the sounding training signal, where timing information may be removed from one or more fields of the sounding training signal and the time delay may be appended to an interframe spacing. Alternatively, a frame may be split into multiple frames with the sounding training signal in a first frame, and timing information in a second frame that is offset in time from the first frame.
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Citations
30 Claims
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1. A method for wireless communication, comprising:
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encoding a long training field of a sounding training signal, wherein the encoding comprises applying a phase rotation to the long training field; configuring an extension field of the sounding training signal to include an indication of the encoding; and transmitting the sounding training signal including the encoded long training field and the configured extension field. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for wireless communication, comprising:
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receiving a long training field of a sounding training signal; determining a channel estimate based at least in part on the sounding training signal; receiving an extension field of the sounding training signal; identifying a phase rotation of the long training field based at least in part on the received extension field; applying the identified phase rotation to the channel estimate to obtain a phase-compensated channel estimate based at least in part on the sounding training signal; and transmitting a signal based on the phase-compensated channel estimate. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for wireless communication, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to; encode a long training field of a sounding training signal, wherein the encoding comprises applying a phase rotation to the long training field; configure an extension field of the sounding training signal to include an indication of the encoding; and transmit the sounding training signal including the encoded long training field and the configured extension field. - View Dependent Claims (17, 18, 19, 20, 21)
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22. An apparatus for wireless communication, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to; receive a long training field of a sounding training signal; determine a channel estimate based at least in part on the sounding training signal; receive an extension field of the sounding training signal; identify a phase rotation of the long training field based at least in part on the received extension field; apply the identified phase rotation to the channel estimate to obtain a phase-compensated channel estimate based at least in part on the sounding training signal; and transmit a signal based on the phase-compensated channel estimate. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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Specification