Pilot tone design for distributed-tone resource units in 6GHz low-power indoor systems

An apparatus, comprising:

• a transceiver configured to transmit and receive wirelessly;
• and
• a processor coupled to the transceiver and configured to perform operations comprising:
• generating a plurality of pilot tones of a distributed-tone resource unit (dRU) based on a hierarchical structure of pilot tones that is used for a regular RU (rRU);
• and
• communicating, via the transceiver, using the dRU,
• wherein, in generating the pilot tones of the dRU based on the hierarchical structure of pilot tones, the processor is configured to generate a 26-tone dRU and any of a 52-tone dRU or a 106-tone dRU over a 20 MHz bandwidth, a 40 MHz bandwidth and an 80 MHz bandwidth,
• wherein pilot tone indices of the 26-tone dRU over the 40 MHz bandwidth comprise {−224 28}, {−125 127}, {−202 50}, {−103 149}, {−81 171}, {−114 138}, {−213 39}, {−92 160}, {−191 61}, {−169 83}, {−70 182}, {−147 105}, {−48 204}, {−180 72}, {−59 193}, {−158 94}, {−37 215}, {−136 116}, and wherein pilot tone indices of the 26-tone dRU over the 80 MHz bandwidth comprise:
• {−447 53}, {−359 141}, {−403 97}, {−315 185}, {−271 229}, {−227 273}, {−139 361}, {−183 317}, {−95 405}, {−117 383}, {−425 75}, {−73 427}, {−381 119}, {−161 339}, {−337 163}, {−249 251}, {−293 207}, {−205 295}, {−194 306}, {−106 394}, {−150 350}, {−62 438}, {−414 86}, {−370 130}, {−282 218}, {−326 174}, {−238 262}, {−260 240}, {−172 328}, {−216 284}, {−128 372}, {−304 196}, {−84 416}, {−392 108}, {−436 64}, {−348 152},
• wherein pilot tone indices of the 52-tone dRU over the 20 MHz bandwidth comprise {−111 −89 15 37}, {−100 −78 26 48}, {−56 −34 70 92}, {−45 −23 81 103}, wherein pilot tone indices of the 52-tone dRU over the 40 MHz bandwidth comprise {−224 −125 28 127}, {−202 −103 50 149}, {−213 −114 39 138}, {−191 −92 61 160}, {−169 −70 83 182}, {−147 −48 105 204}, {−158 −59 94 193}, {−136 −37 116 215}, and wherein pilot tone indices of the 52-tone dRU over the 80 MHz bandwidth comprise {−447 −359 53 141}, {−403 −315 97 185}, {−227 −139 273 361}, {−183 −95 317 405}, {−425 −117 75 383}, {−381 −73 119 427}, {−337 −249 163 251}, {−293 −205 207 295}, {−194 −106 306 394}, {−150 −62 350 438}, {−370 −282 130 218}, {−326 −238 174 262}, {−260 −172 240 328}, {−216 −128 284 372}, {−392 −84 108 416}, {−436 −348 64 152},
• wherein pilot tone indices of the 106-tone dRU over the 20 MHz bandwidth comprise {−111 −78 15 48}, {−56 −23 70 103}, wherein pilot tone indices of the 106-tone dRU over the 40 MHz bandwidth comprise {−224 −125 28 127}, {−191 −92 61 160}, {−169 −70 83 182}, {−136 −37 116 215}, and wherein pilot tone indices of the 106-tone dRU over the 80 MHz bandwidth comprise {−447 −359 53 141}, {−227 −139 273 361}, {−425 −117 75 383}, {−337 −249 163 251}, {−194 −106 306 394}, {−370 −282 130 218}, {−260 −172 240 328}, {−392 −84 108 416},
• wherein pilot values of dRUs having two pilot tones comprise [1 −1],
• wherein pilot values of dRUs having four pilot tones comprise [1 1 1 −1], and
• wherein pilot values of dRUs having eight pilot tones comprise [1 1 1 −1 −1 1 1 1].