Method, apparatus, and computer program product for processing received signals for locating

A method comprising:

• receiving a plurality of wireless signal streams that originated from at least one node device, wherein each wireless signal stream includes a signal of interest and has a respective carrier frequency;
• generating signal timing information including one or more of pulses corresponding to a correlation with one or more frequencies based on each of the plurality of wireless signal streams, the pulses being time-compressed portions of the signal of interest;
• determining times for a plurality of window periods for the signal of interest with respect to the signal timing information for each of the respective carrier frequencies, wherein each window period is associated with a respective pulse of the timing information;
• applying times and one or more determined gains for the signal of interest to permit estimate of a phase of the received signal for a time-of-arrival determination;
• retrieving, from a memory device that stores the wireless signal streams, symbols of the signal of interest based on the window periods;
• formatting the symbols of the signal of interest in preparation for determining a location of a source of the signal of interest;
• determining time of arrival information based on the formatted symbols;
• and
• providing the time of arrival information to a location processing service to determine the location of the source of the signal based on the time of arrival information.

An apparatus comprising processing circuitry configured to perform operations including:

• receiving a plurality of wireless signal streams from at least one node device, wherein each wireless signal stream includes a signal of interest and has a respective carrier frequency;
• generating signal timing information including one or more of pulses corresponding to a correlation with one or more frequencies based on each of the plurality of wireless signal streams, the pulses being time-compressed portions of the signal of interest;
• determining times for a plurality of window periods for the signal of interest with respect to the signal timing information for each of the respective carrier frequencies, wherein each window period is associated with a respective pulse of the timing information;
• applying times and gains for the signal of interest to permit estimate of a phase of the received signal for a time-of-arrival determination;
• retrieving, from a memory device that stores the wireless signal streams, symbols of the signal of interest based on the window periods;
• formatting the symbols of the signal of interest in preparation for determining a location of a source of the signal of interest;
• determining time of arrival information based on the formatted symbols;
• and
• provide the time of arrival information to a location processing service to determine the location of the source of the signal based on the time of arrival information.

A non-transitory computer-readable storage medium having program code stored thereon, the program code being configured to, upon execution, direct an apparatus to perform operations including:

• receiving a plurality of wireless signal streams from at least one node device, wherein each wireless signal stream includes a signal of interest and has a respective carrier frequency;
• generating signal timing information including one or more of pulses corresponding to a correlation with one or more frequencies based on each of the plurality of wireless signal streams, the pulses being time-compressed portions of the signal of interest;
• determining times for a plurality of window periods for the signal of interest with respect to the signal timing information for each of the respective carrier frequencies, wherein each window period is associated with a respective pulse of the timing information;
• applying times and one or more determined gains for the signal of interest to permit estimate of the phase of the received signal for a time-of-arrival determination;
• retrieving, from a memory device that stores the wireless signal streams, symbols of the signal of interest based on the window periods;
• formatting the symbols of the signal of interest in preparation for determining a location of a source of the signal of interest;
• determining time of arrival information based on the formatted symbols;
• and
• providing the time of arrival information to a location processing service to determine the location of the source of the signal based on the time of arrival information.