Method and apparatus for constructing very high throughput long training field sequences

An apparatus for wireless communications, comprising:

• a circuit configured to determine a long training field (LTF) sequence of a preamble that combines a plurality of interpolating sequences with LTF tone values, wherein the LTF tone values cover at least a portion of bandwidth of a first size, each of the LTF tone values is repeated one or more times for different subcarriers, phases of tones of the LTF sequence are rotated per bandwidth of the first size, and certain tones of the LTF sequence have a stream of values at pilot locations;
• and
• a transmitter configured to transmit the preamble, the transmitter configured to transmit the LTF sequence within the preamble over a wireless channel by utilizing a bandwidth of a second size larger than the first size.

A method for wireless communications, comprising:

• determining, at an apparatus, a long training field (LTF) sequence of a preamble that combines a plurality of interpolating sequences with LTF tone values, wherein determining the LTF sequence includes designing the plurality of interpolating sequences in an effort to reduce a peak-to-average power ratio (PAPR) during a transmission of the LTF sequence, wherein the LTF tone values cover at least a portion of bandwidth of a first size, each of the LTF tone values is repeated one or more times for different subcarriers, phases of tones of the LTF sequence are rotated per bandwidth of the first size, and certain tones of the LTF sequence have a stream of values at pilot locations;
• and
• transmitting the preamble by the apparatus.

An apparatus for wireless communications, comprising:

• means for determining a long training field (LTF) sequence of a preamble that combines a plurality of interpolating sequences with LTF tone values, wherein the LTF tone values cover at least a portion of bandwidth of a first size, each of the LTF tone values is repeated one or more times for different subcarriers, phases of tones of the LTF sequence are rotated per bandwidth of the first size, and certain tones of the LTF sequence have a stream of values at pilot locations;
• and
• means for transmitting the preamble, wherein the LTF sequence is transmitted within the preamble over a wireless channel by utilizing a bandwidth of a second size larger than the first size.

A non-transitory computer-readable medium comprising instructions executable to:

• determine a long training field (LTF) sequence of a preamble that combines a plurality of interpolating sequences with LTF tone values, wherein the LTF tone values cover at least a portion of bandwidth of a first size, each of the LTF tone values is repeated one or more times for different subcarriers, phases of tones of the LTF sequence are rotated per bandwidth of the first size, and certain tones of the LTF sequence have a stream of values at pilot locations;
• and
• transmit the preamble, wherein the LTF sequence is transmitted within the preamble over a wireless channel by utilizing a bandwidth of a second size larger than the first size.

An apparatus for wireless communications, comprising:

• a circuit configured to determine a long training field (LTF) sequence of a preamble that combines a plurality of interpolating sequences with LTF tone values, wherein the LTF tone values cover at least a portion of bandwidth of a first size, each of the LTF tone values is repeated one or more times for different subcarriers, phases of tones of the LTF sequence are rotated per bandwidth of the first size, and certain tones of the LTF sequence have a stream of values at pilot locations, wherein the circuit is further configured to design the plurality of interpolating sequences in an effort to reduce a peak-to-average power ratio (PAPR) during a transmission of the LTF sequence;
• and
• a transmitter configured to transmit the preamble.

An apparatus for wireless communications, comprising:

• means for determining a long training field (LTF) sequence of a preamble that combines a plurality of interpolating sequences with LTF tone values, the plurality of interpolating sequences designed in an effort to reduce a peak-to-average power ratio (PAPR) during a transmission of the LTF sequence, wherein the LTF tone values cover at least a portion of bandwidth of a first size, each of the LTF tone values is repeated one or more times for different subcarriers, phases of tones of the LTF sequence are rotated per bandwidth of the first size, and certain tones of the LTF sequence have a stream of values at pilot locations;
• and
• means for transmitting the preamble.

A non-transitory computer-readable medium comprising instructions executable to:

• determine a long training field (LTF) sequence of a preamble that combines a plurality of interpolating sequences with LTF tone values, the plurality of interpolating sequences designed in an effort to reduce a peak-to-average power ratio (PAPR) during a transmission of the LTF sequence, wherein the LTF tone values cover at least a portion of bandwidth of a first size, each of the LTF tone values is repeated one or more times for different subcarriers, phases of tones of the LTF sequence are rotated per bandwidth of the first size, and certain tones of the LTF sequence have a stream of values at pilot locations;
• and
• transmit the preamble.