Preamble extensions
First Claim
Patent Images
1. An apparatus for communications, comprising:
- at least one processor configured to generate a frame comprising a preamble portion having at least four symbols as associated with at least three signal (SIG) fields comprising a first SIG field and a second SIG field both conforming to a legacy standard and a third SIG field indicating a non-legacy mode, wherein the preamble portion further comprises a training sequence; and
a transmitter configured to transmit the frame;
wherein the training sequence comprises a number of modulated symbols, wherein at least a portion of the training sequence is distributed across a first symbol in a set of at least four transmit chains comprising a first transmit chain and a second symbol in a second transmit chain, and sign of one third SIG field in one of the at least four transmit chains differs from a sign of each third SIG field in three of the at least four transmit chains.
2 Assignments
0 Petitions
Accused Products
Abstract
Systems and/or methods for communication generate a plurality of spatial streams. Each of the spatial streams comprises a plurality of symbols. At least a portion of a training sequence is distributed across a first symbol in a first one of the spatial streams and a second symbol in a second one of the spatial streams.
44 Citations
42 Claims
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1. An apparatus for communications, comprising:
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at least one processor configured to generate a frame comprising a preamble portion having at least four symbols as associated with at least three signal (SIG) fields comprising a first SIG field and a second SIG field both conforming to a legacy standard and a third SIG field indicating a non-legacy mode, wherein the preamble portion further comprises a training sequence; and a transmitter configured to transmit the frame; wherein the training sequence comprises a number of modulated symbols, wherein at least a portion of the training sequence is distributed across a first symbol in a set of at least four transmit chains comprising a first transmit chain and a second symbol in a second transmit chain, and sign of one third SIG field in one of the at least four transmit chains differs from a sign of each third SIG field in three of the at least four transmit chains. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for communications, comprising:
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generating a frame comprising a preamble portion having at least four symbols associated with at least three signal (SIG) fields comprising a first SIG field and a second SIG field both conforming to a legacy standard and a third SIG field indicating a non-legacy mode, wherein the preamble portion further comprises a training sequence; and transmitting the frame; wherein the training sequence comprises a number of modulated symbols, wherein at least a portion of the training sequence is distributed across a first symbol in a set of at least four transmit chains comprising a first transmit chain and a second symbol in a second transmit chain, and sign of one third SIG field in one of the at least four transmit chains differs from a sign of each third SIG field in three of the at least four transmit chains. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An apparatus for communications, comprising:
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means for generating a frame comprising a preamble portion having at least four symbols associated with at least three signal (SIG) fields comprising a first SIG field and a second SIG field both conforming to a legacy standard and a third SIG field indicating a non-legacy mode, wherein the preamble portion further comprises a training sequence; and means for transmitting the frame; wherein the training sequence comprises a number of modulated symbols, wherein at least a portion of the training sequence is distributed across a first symbol in a set of at least four transmit chains comprising a first transmit chain and a second symbol in a second transmit chain, and sign of one third SIG field in one of the at least four transmit chains differs from a sign of each third SIG field in three of the at least four transmit chains. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A computer-program product for wireless communication, comprising:
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a non-transitory machine-readable medium encoded with instructions executable to; generate a frame comprising a preamble portion having at least four symbols associated with at least three signal (SIG) fields comprising a first SIG field and a second SIG field both conforming to a legacy standard and a third SIG field indicating a non-legacy mode, wherein the preamble portion further comprises a training sequence; and transmit the frame; wherein the training sequence comprises a number of modulated symbols, wherein at least a portion of the training sequence is distributed a first symbol in a set of at least four transmit chains comprising a first transmit chain and a second symbol in a second transmit chain, and sign of one third SIG field in one of the at least four transmit chains differs from a sign of each third SIG field in three of the at least four transmit chains.
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41. An access point, comprising:
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at least one antenna; at least one processor configured to generate a frame comprising a preamble portion having at least four symbols associated with at least three signal (SIG) fields comprising a first SIG field and a second SIG field both conforming to a legacy standard and a third SIG field indicating a non-legacy mode, wherein the preamble portion further comprises a training sequence; and a transmitter configured to transmit the frame via the at least one antenna; wherein the training sequence comprises a number of modulated symbols, wherein at least a portion of the training sequence is distributed across a first symbol in a set of at least four transmit chains comprising a first transmit chain and a second symbol in a second transmit chain, and sign of one third SIG field in one of the at least four transmit chains differs from a sign of each third SIG field in three of the at least four transmit chains.
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42. An access terminal, comprising:
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at least one processor configured to generate a frame comprising a preamble portion having at least four symbols associated with at least three signal (SIG) fields comprising a first SIG field and a second SIG field both conforming to a legacy standard and a third SIG field indicating a non-legacy mode, wherein the preamble portion further comprises a training sequence; a transmitter configured to transmit the frame; and a user interface supported by the at least one processor; wherein the training sequence comprises a number of modulated symbols, wherein at least a portion of the training sequence is distributed across a first symbol in a set of at least four transmit chains comprising a first transmit chain and a second symbol in a second transmit chain, and sign of one third SIG field in one of the at least four transmit chains differs from a sign of each third SIG field in three of the at least four transmit chains.
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Specification