Enhanced sounding for secure mode wireless communications

Abstract

This disclosure describes systems, methods, and devices related to enhanced sounding for secure mode wireless communications. A device may generate a channel sounding symbol comprising a first subcarrier and a second subcarrier, wherein a first amplitude of the first subcarrier is different than a second amplitude of the second subcarrier. The device may generate a channel sounding signal comprising the channel sounding symbol. The device may send the channel sounding signal to a second device.

What is claimed is: 
     
         1 . A device, the device comprising processing circuitry coupled to storage, the processing circuitry configured to:
 generate a channel sounding symbol comprising a first subcarrier and a second subcarrier, wherein a first amplitude of the first subcarrier is different than a second amplitude of the second subcarrier;   generate a channel sounding signal comprising the channel sounding symbol; and   send the channel sounding signal to a second device.   
     
     
         2 . The device of  claim 1 , wherein the channel sounding signal is a null data packet (NDP). 
     
     
         3 . The device of  claim 1 , wherein to generate the channel sounding symbol comprises to generate the channel sounding symbol using a 16 quadrature amplitude modulation (QAM) constellation. 
     
     
         4 . The device of  claim 1 , wherein to generate the channel sounding symbol comprises to generate the channel sounding symbol using a 64 QAM constellation. 
     
     
         5 . The device of  claim 1 , wherein to generate the channel sounding symbol comprises to generate the channel sounding symbol using a 256 QAM constellation. 
     
     
         6 . The device of  claim 1 , wherein to generate the channel sounding symbol comprises to generate the channel sounding symbol using a 1024 QAM constellation. 
     
     
         7 . The device of  claim 1 , wherein to generate the channel sounding symbol comprises to generate the channel sounding symbol using a phase-shift keying (PSK) modulation. 
     
     
         8 . The device of  claim 1 , wherein to generate the channel sounding symbol comprises to generate the channel sounding symbol using quadrature phase-shift keying (QPSK) modulation. 
     
     
         9 . The device of  claim 1 , wherein the processing circuitry is further configured to:
 generate a second channel sounding symbol comprising a third subcarrier and a fourth subcarrier, wherein a third amplitude of the third subcarrier is different than a fourth amplitude of the fourth subcarrier,   wherein the channel sounding symbol further comprises the second channel sounding symbol.   
     
     
         10 . The device of  claim 1 , wherein the processing circuitry is further configured to:
 generate a secure high efficiency long training field (HEz-LTF) comprising the channel sounding symbol,   wherein the channel sounding symbol further comprises the HEz-LTF.   
     
     
         11 . The device of  claim 1 , further comprising a transceiver configured to transmit and receive wireless signals. 
     
     
         12 . The device of  claim 11 , further comprising an antenna coupled to the transceiver to send the channel sounding signal. 
     
     
         13 . A non-transitory computer-readable medium storing computer-executable instructions which when executed by one or more processors result in performing operations comprising:
 generating, by a first device, a channel sounding symbol comprising a first subcarrier and a second subcarrier, wherein a first amplitude of the first subcarrier is different than a second amplitude of the second subcarrier;   generating, by the first device, a channel sounding signal comprising the channel sounding symbol; and   sending, by the first device, the channel sounding signal to a second device.   
     
     
         14 . The non-transitory computer-readable medium of  claim 13 , wherein the channel sounding signal is a null data packet (NDP). 
     
     
         15 . The non-transitory computer-readable medium of  claim 13 , wherein generating the channel sounding symbol comprises generating the channel sounding symbol using a 16 quadrature amplitude modulation (QAM) constellation. 
     
     
         16 . The non-transitory computer-readable medium of  claim 13 , wherein generating the channel sounding symbol comprises generating the channel sounding symbol using a 64 QAM or greater constellation. 
     
     
         17 . The non-transitory computer-readable medium of  claim 13 , wherein generating the channel sounding symbol comprises generating the channel sounding symbol using phase-shift keying (PSK) modulation. 
     
     
         18 . The non-transitory computer-readable medium of  claim 13 , wherein generating the channel sounding symbol comprises generating the channel sounding symbol using quadrature phase-shift keying (QPSK) modulation. 
     
     
         19 . A method comprising:
 generating, by processing circuitry of a first device, a channel sounding symbol comprising a first subcarrier and a second subcarrier, wherein a first amplitude of the first subcarrier is different than a second amplitude of the second subcarrier;   generating, by the processing circuitry, a channel sounding signal comprising the channel sounding symbol; and   sending, by the processing circuitry, the channel sounding signal to a second device.   
     
     
         20 . The method of  claim 19 , wherein generating the channel sounding symbol comprises generating the channel sounding symbol using a 64 QAM or greater constellation.