Cooperative sounding based on coherent subcarrier assignments

A non-transitory computer-readable storage medium containing computer program code that, when executed by operation of one or more computer processors, performs an operation comprising:

• receiving coherence data from a plurality of access points (APs), wherein the coherence data indicates, for each respective AP of the plurality of APs, coherence bandwidth for a plurality of subcarriers;
• generating a mapping indicating, for each of the plurality of APs, sets of subcarriers that can be interchangeably sounded;
• identifying, based on the mapping, two or more APs of the plurality of APs that can jointly sound a first subcarrier of the plurality of subcarriers;
• and
• allocating the first subcarrier to the identified two or more APs for future sounding.

A system comprising:

• one or more computer processors;
• and
• a memory containing a program which when executed by the one or more computer processors performs an operation, the operation comprising:
• receiving coherence data from a plurality of access points (APs), wherein the coherence data indicates, for each respective AP of the plurality of APs, coherence bandwidth for a plurality of subcarriers;
• generating a mapping indicating, for each of the plurality of APs, sets of subcarriers that can be interchangeably sounded;
• identifying, based on the mapping, two or more APs of the plurality of APs that can jointly sound a first subcarrier of the plurality of subcarriers;
• and
• allocating the first subcarrier to the identified two or more APs for future sounding.