Short training field (STF) within wireless communications

Abstract

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. 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.

What is claimed is: 
     
         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 a first orthogonal frequency division multiple access (OFDMA) packet for transmission via a first 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; 
 generate a second OFDMA packet for transmission via a second communication channel, wherein the second OFDMA packet includes a second STF that includes the base binary sequence followed by 0, followed by a phased rotated version of the base binary sequence; 
 transmit the OFDMA packet to a first other wireless communication device via the first communication channel; and 
 transmit the second OFDMA packet to at least one of the first other wireless communication device or a second other wireless communication device via the second communication channel. 
   
     
     
         2 . 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 a third OFDMA packet for transmission via a third communication channel, wherein the third OFDMA packet includes a third STF that includes the base binary sequence followed by 0 followed by an inverted version of the base binary sequence; and   transmit the third OFDMA packet to at least one of the first other wireless communication device, the second other wireless communication device, or a third wireless communication device.   
     
     
         3 . The wireless communication device of  claim 1 , wherein:
 the first communication channel includes a 20 MHz communication channel; and   the second communication channel includes a 40 MHz communication channel.   
     
     
         4 . The wireless communication device of  claim 3 , wherein:
 the 20 MHz communication channel includes a first periodicity or a second periodicity.   
     
     
         5 . The wireless communication device of  claim 3 , wherein:
 the 20 MHz communication channel includes a first periodicity of 0.8 μsec or a second periodicity of 1.6 μsec.   
     
     
         6 . The wireless communication device of  claim 1 , wherein the at least one of the communication interface or the processing circuitry is further configured to:
 rotate the STF by 45 degrees when generating the first OFDMA packet; and   rotate the second STF by 45 degrees when generating the second 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.   
     
     
         7 . The wireless communication device of  claim 1  further comprising:
 an access point (AP), wherein the first or second wireless communication device includes a wireless station (STA). 
 
     
     
         8 . The wireless communication device of  claim 1  further comprising:
 a wireless station (STA), wherein the first or second wireless communication device includes an access point (AP). 
 
     
     
         9 . 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 a first orthogonal frequency division multiple access (OFDMA) packet for transmission via a first 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; 
 generate a second OFDMA packet for transmission via a second communication channel, wherein the second OFDMA packet includes a second STF that includes the base binary sequence followed by 0 followed by a phased rotated version of the base binary sequence; 
 generate a third OFDMA packet for transmission via a third communication channel, wherein the third OFDMA packet includes a third STF that includes the base binary sequence followed by 0 followed by an inverted version of the base binary sequence; 
 transmit the OFDMA packet to a first other wireless communication device via the first communication channel; and 
 transmit the second OFDMA packet to at least one of the first other wireless communication device or a second other wireless communication device via the second communication channel; and 
 transmit the third OFDMA packet to at least one of the first other wireless communication device, the second other wireless communication device, or a third other wireless communication device. 
   
     
     
         10 . The wireless communication device of  claim 9 , wherein the at least one of the communication interface or the processing circuitry is further configured to:
 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; and   transmit the another OFDMA packet to at least one of another wireless communication device that includes a first other wireless communication device, the second other wireless communication device or the third wireless communication device via the another communication channel.   
     
     
         11 . The wireless communication device of  claim 9 , wherein:
 the second communication channel includes a 20 MHz communication channel; and   the first communication channel includes a 40 MHz communication channel.   
     
     
         12 . The wireless communication device of  claim 11 , wherein:
 the 20 MHz communication channel includes a first periodicity or a second periodicity.   
     
     
         13 . The wireless communication device of  claim 11 , wherein:
 the 20 MHz communication channel includes a first periodicity of 0.8 μsec or a second periodicity of 1.6 μsec.   
     
     
         14 . The wireless communication device of  claim 9 , wherein the at least one of the communication interface or the processing circuitry is further configured to:
 rotate the STF by 45 degrees when generating the first OFDMA packet; and   rotate the second STF by 45 degrees when generating the second 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 wireless communication device of  claim 9  further comprising:
 a wireless station (STA), wherein the first, second or third other wireless communication device includes an access point (AP) or another STA. 
 
     
     
         16 . A method for execution by a wireless communication device, the method comprising:
 generating a first orthogonal frequency division multiple access (OFDMA) packet for transmission via a first 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;   generating a second OFDMA packet for transmission via a second communication channel, wherein the second OFDMA packet includes a second STF that includes the base binary sequence followed by 0, followed by a phased rotated version of the base binary sequence;   transmitting the OFDMA packet to a first other wireless communication device via the first communication channel; and   transmitting the second OFDMA packet to at least one of the first other wireless communication device or a second other wireless communication device via the second communication channel.   
     
     
         17 . The method of  claim 16  further comprising:
 generating a third OFDMA packet for transmission via a third communication channel, wherein the third OFDMA packet includes a third STF that includes the base binary sequence followed by 0 followed by an inverted version of the base binary sequence; and 
 transmitting the third OFDMA packet to at least one of the first other wireless communication device, the second other wireless communication device, or a third wireless communication device. 
 
     
     
         18 . The method of  claim 16 , wherein:
 the first communication channel includes a 20 MHz communication channel; and   the second or third communication channels include a 40 MHz communication channel.   
     
     
         19 . The method of  claim 18 , wherein:
 the 20 MHz communication channel includes a first periodicity or a second periodicity.   
     
     
         20 . The method of  claim 16  further comprising:
 rotate the STF by 45 degrees when generating the first OFDMA packet; and 
 rotate the second STF by 45 degrees when generating the second 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.