Short training field (STF) within wireless communications
A wireless communication device (alternatively, device) includes a processor configured to support communications with other wireless communication device(s) and to generate and process signals for such communications. In some examples, the device includes a communication interface and a processor, among other possible circuitries, components, elements, etc. to support communications with other wireless communication device(s) and to generate and process signals for such communications. Short training field (STF) sequences are designed using a base binary sequence. In some examples, the base binary sequence is specified as [−1, −1 −1 +1 +1 +1 −1, +1, +1 +1 −1 +1 +1 −1, +1]. One STF includes the base binary sequence mapped. Another STF includes the base binary sequence followed by 0 followed by a phased rotated version of the base binary sequence. Another STF includes the base binary sequence followed by 0 followed by an inverted version of the base binary sequence.
1. A wireless communication device comprising:
a communication interface; and
processing circuitry that is coupled to the communication interface, wherein at least one of the communication interface or the processing circuitry configured to:
generate an orthogonal frequency division multiple access (OFDMA) packet for transmission via a communication channel, wherein the OFDMA packet includes a short training field (STF) that includes a base binary sequence mapped onto a plurality of OFDMA sub-carriers based on a predetermined spacing pattern, wherein the base binary sequence includes values of +1 and −1;
rotate the STF by 45 degrees when generating the OFDMA packet; and
transmit the OFDMA packet to another wireless communication device via the communication channel; and
generate another OFDMA packet for transmission via another communication channel, wherein the another OFDMA packet includes another STF that includes the base binary sequence followed by 0, followed by a phased rotated version of the base binary sequence;
rotate the another STF by 45 degrees when generating the another OFDMA packet, wherein the predetermined spacing pattern specifies a sub-carrier spacing of 16 for elements of the base binary sequence mapped onto the plurality of OFDMA sub-carriers with indices ranging from −112 to +112; and
transmit the another OFDMA packet to at least one of the another wireless communication device that includes a first other wireless communication device or a second other wireless communication device via the another communication channel.
2. The wireless communication device of claim 1 , wherein:
the communication channel includes a 20 MHz communication channel; and
the another communication channel includes a 40 MHz communication channel.
3. The wireless communication device of claim 1 , wherein the at least one of the communication interface or the processing circuitry is further configured to:
generate at least one other OFDMA packet that includes at least one other STF that includes the base binary sequence followed by 0 followed by an inverted version of the base binary sequence; and
transmit the at least one other OFDMA packet to at least one of the another wireless communication device that includes a first other wireless communication device or a second other wireless communication device, or a third wireless communication device.
4. The wireless communication device of claim 1 , wherein the base binary sequence is specified as [−1, −1 −1 +1 +1 +1 −1, +1, +1 +1 −1 +1 +1 −1, +1].
5. The wireless communication device of claim 1 further comprising:
an access point (AP), wherein the another wireless communication device includes a wireless station (STA).
6. The wireless communication device of claim 1 further comprising:
a wireless station (STA), wherein the another wireless communication device includes an access point (AP).
7. A wireless communication device comprising:
a communication interface; and
processing circuitry that is coupled to the communication interface, wherein at least one of the communication interface or the processing circuitry configured to:
generate an orthogonal frequency division multiple access (OFDMA) packet for transmission via a communication channel, wherein the OFDMA packet includes a short training field (STF) that includes a base binary sequence mapped onto a plurality of OFDMA sub-carriers based on a predetermined spacing pattern followed by 0 followed by a phased rotated version of the base binary sequence, wherein the base binary sequence includes values of +1 and −1;
rotate the STF by 45 degrees when generating the OFDMA packet, wherein the predetermined spacing pattern specifies a sub-carrier spacing of 16 for elements of the base binary sequence mapped onto the plurality of OFDMA sub-carriers with indices ranging from −112 to +112; and
transmit the OFDMA packet to another wireless communication device via the communication channel; and
generate another OFDMA packet for transmission via another communication channel, wherein the another OFDMA packet includes another STF that includes the base binary sequence mapped onto the plurality of OFDMA sub-carriers based on the predetermined spacing pattern;
rotate the another STF by 45 degrees when generating the another OFDMA packet; and
transmit the another OFDMA packet to at least one of the another wireless communication device that includes a first other wireless communication device or a second other wireless communication device via the another communication channel.
8. The wireless communication device of claim 7 , wherein:
the another communication channel includes a 20 MHz communication channel; and the communication channel includes a 40 MHz communication channel.
9. The wireless communication device of claim 7 , wherein the base binary sequence is specified as [−1, −1 −1 +1 +1 +1 −1, +1, +1 +1 −1 +1 +1 −1, +1].
10. The wireless communication device of claim 7 further comprising:
a wireless station (STA), wherein the another wireless communication device includes an access point (AP) or another STA.
11. A method for execution by a wireless communication device, the method comprising:
generating an orthogonal frequency division multiple access (OFDMA) packet for transmission via a communication channel, wherein the OFDMA packet includes a short training field (STF) that includes a base binary sequence mapped onto a plurality of OFDMA sub-carriers based on a predetermined spacing pattern, wherein the base binary sequence includes values of +1 and −1 and is specified as [−1, −1 −1 +1 +1 +1 −1, +1, +1 +1 −1 +1 +1 −1, +1]; and
transmitting, via a communication interface of the wireless communication device, the OFDMA packet to another wireless communication device via the communication channel.
12. The method of claim 11 further comprising:
generating another OFDMA packet for transmission via another communication channel, wherein the another OFDMA packet includes another STF that includes the base binary sequence followed by 0 followed by a phased rotated version of the base binary sequence; and
transmitting, via the communication interface of the wireless communication device, the another OFDMA packet to at least one of the another wireless communication device that includes a first other wireless communication device or a second other wireless communication device via the another communication channel.
13. The method of claim 12 , wherein:
the communication channel includes a 20 MHz communication channel; and
the another communication channel includes a 40 MHz communication channel.
14. The method of claim 12 further comprising:
rotating the STF by 45 degrees when generating the OFDMA packet; and
rotating the another STF by 45 degrees when generating the another OFDMA packet, wherein the predetermined spacing pattern specifies a sub-carrier spacing of 16 for elements of the base binary sequence mapped onto the plurality of OFDMA sub-carriers with indices ranging from −112 to +112.
15. The method of claim 11 further comprising:
generating at least one other OFDMA packet that includes at least one other STF that includes the base binary sequence followed by 0 followed by an inverted version of the base binary sequence; and
transmitting, via the communication interface of the wireless communication device, the at least one other OFDMA packet to at least one of the another wireless communication device that includes a first other wireless communication device or a second other wireless communication device, or a third wireless communication device.