Methods and arrangements for channel updates in wireless networks

A device to update, using pilot tones, channel information regarding a wireless communication channel, the device comprising:

• memory to store phase rotations;
• logic coupled with the memory to receive an orthogonal frequency division multiplexing transmission with pilot tones shifting locations periodically between subcarrier indices of orthogonal frequency division multiplexing symbols;
• use at least some of the pilot tones to determine phase rotations and channel estimates for the wireless communication channel;
• calculation of at least one predicted phase rotation based upon more than one of the phase rotations in memory, wherein calculation of the at least one predicted phase rotation comprises calculation, for a pilot tone location that is adjacent to the direct current tone or to the edge tones, with the more than one phase rotations from the memory, of the at least one predicted phase rotation;
• and perform phase tracking based upon the phase rotations and the at least one predicted phase rotation.

A system to update, using pilot tones, channel information regarding a wireless communication channel, the system comprising:

• a processor, a radio, and one or more antennas;
• memory to store phase rotations;
• a receiver coupled with the memory and the radio to receive an orthogonal frequency division multiplexing transmission with pilot tones shifting locations periodically between subcarrier indices of orthogonal frequency division multiplexing symbols;
• use at least some of the pilot tones to determine phase rotations and channel estimates for the wireless communication channel;
• calculation of at least one predicted phase rotation based upon more than one of the phase rotations in memory, wherein calculation of the at least one predicted phase rotation comprises calculation, for a pilot tone location that is adjacent to the direct current tone or to the edge tones, with the more than one phase rotations from the memory, of the at least one predicted phase rotation;
• and perform phase tracking based upon the phase rotations and the at least one predicted phase rotation and
• a transmitter coupled with the radio to transmit a second orthogonal frequency division multiplexing transmission with pilot tones shifting locations periodically.

A machine-accessible product comprising:

• a non-transitory medium containing instructions to update, using pilot tones, channel information regarding a wireless communication channel, wherein the instructions, when executed by a station, causes the station to perform operations, the operations comprising:
• receiving an orthogonal frequency division multiplexing transmission with pilot tones shifting locations periodically between subcarrier indices of orthogonal frequency division multiplexing symbols;
• using at least some of the pilot tones to determine phase rotations and channel estimates for the wireless communication channel;
• storing more than one of the phase rotations in memory;
• calculating at least one predicted phase rotation based upon the more than one of the phase rotations in memory, wherein calculating the at least one predicted phase rotation comprises calculating, for a pilot tone location that is adjacent to the direct current tone or to the edge tones, with the more than one phase rotations from the memory, the at least one predicted phase rotation;
• and
• performing phase tracking based upon more than one of the phase rotations and the at least one predicted phase rotation.