Internet of things (IoT) device location tracking using midambles

An apparatus, comprising:

• one or more network interfaces to communicate with a network, the one or more network interfaces including an antenna array;
• a processor coupled to the network interfaces and configured to execute one or more processes;
• and
• a memory configured to store a process executable by the processor, the process, when executed, is configured to:
• receive one or more first data symbols of a data payload from a wireless device using a first antenna state, the first antenna state assigning a radio path that is used for location estimation to a first antenna of the antenna array;
• change the first antenna state to a second antenna state subsequent to identifying a first midamble of the data payload, the second antenna state assigning the radio path to a second antenna of the antenna array;
• receive one or more second data symbols of the data payload from the wireless device using the second antenna state;
• and
• determine a location of the wireless device based on location information determined using the radio path.

A tangible, non-transitory, computer-readable medium storing program instructions executable by a processor, wherein the program instructions cause a first wireless device in connection with an antenna array to execute a process comprising:

• receiving one or more first data symbols of a data payload front a second wireless device using a first antenna state, the first antenna state assigning a radio path that is used for location estimation to a first antenna of the antenna array;
• changing the first antenna state to a second antenna state subsequent to identifying a first midamble of the data payload, the second antenna state assigning the radio path to a second antenna of the antenna array;
• receiving one or more second data symbols of the data payload from the second wireless device using the second antenna state;
• and
• determining a location of the second wireless device based on location information determined using the radio path.