Systems and methods for improvements to training field design for increased symbol durations

Abstract

Methods, devices, and computer program products for improving training field design in packets with increased symbol durations are disclosed. In one aspect, a method of transmitting a packet on a wireless communication network is disclosed. The method includes transmitting a preamble of the packet over a number (N STS ) of space-time-streams over a plurality of tones, the preamble including a number (N TF ) of training fields configured to be used for channel estimation for each of the N STS of space-time-streams, where a subset of the N STS of space-time-streams is active on each tone. The method further includes transmitting a payload of the packet over the N STS of space-time-streams.

What is claimed is: 
     
         1 . A method of transmitting a packet on a wireless communication network, the method comprising:
 transmitting a preamble of the packet over a number (N STS ) of space-time-streams over a plurality of tones, the preamble including a number (N TF ) of training fields configured to be used for channel estimation for each of the N STS  of space-time-streams, where a subset of the N STS  of space-time-streams is active on each tone; and   transmitting a payload of the packet over the N STS  of space-time-streams.   
     
     
         2 . The method of  claim 1 , wherein each of the N TF  of training fields is transmitted over the plurality of tones, and where each of the N STS  of space-time-streams is part of one of a number (N g ) of groups, each of the N g  of groups transmitting to a subset of the plurality of tones based upon an orthogonal matrix. 
     
     
         3 . The method of  claim 2 , wherein for each training field, each tone is masked by a column of a P-matrix comprising a number of columns equal to a value of the N STS  divided by a value of the N g , and a number of rows equal to the value of the N STS  divided by the value of the N g . 
     
     
         4 . The method of  claim 2 , wherein a value of the N g  is equal to a value of the N STS  and a single training field is transmitted over the N STS  of space-time-streams interleaved over the plurality of tones. 
     
     
         5 . The method of  claim 2 , wherein a value of the N STS  is not an integer multiple of a value of the N g  and each of the N STS  of space-time-steams are transmitted on an average number of the plurality of tones equal to the value of the N g  divided by the value of the N STS . 
     
     
         6 . The method of  claim 2 , wherein a value of the N STS  is not an integer multiple of a value of the N g  and each of the N STS  of space-time-steams are transmitted on an average number of the plurality of tones equal to the value of the N g . 
     
     
         7 . The method of  claim 1 , wherein every odd tone is populated with a first subset of space-time-streams and every even tone is populated with a second subset of space-time streams. 
     
     
         8 . A wireless communication apparatus, comprising:
 a processor configured to:
 generate a preamble of a packet over a number (N STS ) of space-time-streams over a plurality of tones, the preamble including a number (N TF ) of training fields configured to be used for channel estimation for each of the N STS  of space-time-streams, where a subset of the N STS  of space-time-streams is active on each tone; 
 generate a payload of the packet to be transmitted over the N STS  of space-time-streams; and 
   a transmitter configured to transmit the packet.   
     
     
         9 . The wireless communication apparatus of  claim 8 , wherein each of the N TF  of training fields is transmitted over the plurality of tones, and where each of the N STS  of space-time-streams is part of one of a number (N g ) of groups, each of the N g  of groups transmitting to a subset of the plurality of tones based upon an orthogonal matrix. 
     
     
         10 . The wireless communication apparatus of  claim 9 , wherein for each training field, each tone is masked by a column of a P-matrix comprising a number of columns equal to a value of the N STS  divided by a value of the N g , and a number of rows equal to the value of the N STS  divided by the value of the N g . 
     
     
         11 . The wireless communication apparatus of  claim 9 , wherein a value of the N g  is equal to a value of the N STS  and a single training field is transmitted over the N STS  of space-time-streams interleaved over the plurality of tones. 
     
     
         12 . The wireless communication apparatus of  claim 9 , wherein a value of the N STS  is not an integer multiple of a value of the N g  and each of the N STS  of space-time-steams are transmitted on an average number of the plurality of tones equal to the value of the N g  divided by the value of the N STS . 
     
     
         13 . The wireless communication apparatus of  claim 9 , wherein a value of the N STS  is not an integer multiple of a value of the N g  and each of the N STS  of space-time-steams are transmitted on an average number of the plurality of tones equal to the value of the N g . 
     
     
         14 . The wireless communication apparatus of  claim 8 , wherein every odd tone is populated with a first subset of space-time-streams and every even tone is populated with a second subset of space-time streams. 
     
     
         15 . A non-transitory computer readable medium comprising instructions that when executed cause a processor in a device to perform a method of transmitting a packet over a wireless communication network, the method comprising:
 transmitting a preamble of the packet over a number (N STS ) of space-time-streams over a plurality of tones, the preamble including a number (N TF ) of training fields configured to be used for channel estimation for each of the N STS  of space-time-streams, where a subset of the N STS  of space-time-streams is active on each tone; and   transmitting a payload of the packet over the N STS  of space-time-streams.   
     
     
         16 . The computer readable medium of  claim 15 , wherein each of the N TF  of training fields is transmitted over the plurality of tones, and where each of the N STS  of space-time-streams is part of one of a number (N g ) of groups, each of the N g  of groups transmitting to a subset of the plurality of tones based upon an orthogonal matrix. 
     
     
         17 . The computer readable medium of  claim 16 , wherein for each training field, each tone is masked by a column of a P-matrix comprising a number of columns equal to a value of the N STS  divided by a value of the N g , and a number of rows equal to the value of the N STS  divided by the value of the N g . 
     
     
         18 . The computer readable medium of  claim 16 , wherein a value of the N g  is equal to a value of the N STS  and a single training field is transmitted over the N STS  of space-time-streams interleaved over the plurality of tones. 
     
     
         19 . The computer readable medium of  claim 16 , wherein a value of the N STS  is not an integer multiple of a value of the N g  and each of the N STS  of space-time-steams are transmitted on an average number of the plurality of tones equal to the value of the N g  divided by the value of the N STS . 
     
     
         20 . The computer readable medium of  claim 16 , wherein a value of the N STS  is not an integer multiple of a value of the N g  and each of the N STS  of space-time-steams are transmitted on an average number of the plurality of tones equal to the value of the N g . 
     
     
         21 . The computer readable medium of  claim 15 , wherein every odd tone is populated with a first subset of space-time-streams and every even tone is populated with a second subset of space-time streams. 
     
     
         22 . A wireless communication apparatus, comprising:
 means for transmitting a preamble of a packet over a number (N STS ) of space-time-streams over a plurality of tones, the preamble including a number (N TF ) of training fields configured to be used for channel estimation for each of the N STS  of space-time-streams, where a subset of the N STS  of space-time-streams is active on each tone; and   means for transmitting a payload of the packet over the N STS  of space-time-streams.   
     
     
         23 . The wireless communication apparatus of  claim 22 , wherein each of the N TF  of training fields is transmitted over the plurality of tones, and where each of the N STS  of space-time-streams is part of one of a number (N g ) of groups, each of the N g  of groups transmitting to a subset of the plurality of tones based upon an orthogonal matrix. 
     
     
         24 . The wireless communication apparatus of  claim 23 , wherein for each training field, each tone is masked by a column of a P-matrix comprising a number of columns equal to a value of the N STS  divided by a value of the N g , and a number of rows equal to the value of the N STS  divided by the value of the N g . 
     
     
         25 . The wireless communication apparatus of  claim 23 , wherein a value of the N g  is equal to a value of the N STS  and a single training field is transmitted over the N STS  of space-time-streams interleaved over the plurality of tones. 
     
     
         26 . The wireless communication apparatus of  claim 23 , wherein a value of the N STS  is not an integer multiple of a value of the N g  and each of the N STS  of space-time-steams are transmitted on an average number of the plurality of tones equal to the value of the N g  divided by the value of the N STS . 
     
     
         27 . The wireless communication apparatus of  claim 23 , wherein a value of the N STS  is not an integer multiple of a value of the N g  and each of the N STS  of space-time-steams are transmitted on an average number of the plurality of tones equal to the value of the N g . 
     
     
         28 . The wireless communication apparatus of  claim 22 , wherein every odd tone is populated with a first subset of space-time-streams and every even tone is populated with a second subset of space-time streams.