System and method for determining phase and delay offsets of combined source channels

A system for measuring differences in delay and phase offset between signals transmitted through at least two source channels within a single common bandwidth, comprising:

• a processor;
• a memory that stores instructions, which when executed by the processor, cause the processor to:
• transmit an identical signal through the at least two source channels at a same frequency;
• combine the signals from the at least two source channels so that they interfere;
• analyze amplitude versus frequency characteristic of the combined signal, wherein when the signals are not matched in phase, delay and amplitude, determine that there is a change in amplitude across the common bandwidth as the combined signals constructively and destructively interfere at different frequencies;
• analyze frequency content of the changing amplitude that represents the rate of constructive and destructive interference;
• determine change in rate of constructive and destructive interference as the amplitude changes between constructive interference and destructive interference to determine an initial estimated delay and phase offset between the at least two source channels;
• identify at least one pair of tones that has a best constructive and destructive interference representing a null outside the bandwidth;
• determine a remaining error in delay and phase offset;
• and
• correct the initial estimated delay and phase offset between the at least two source channels by the determined remaining error.

A non-transitory computer readable medium that stores instructions for measuring differences in delay and phase offset between signals transmitted through at least two separate channels within a single common bandwidth, which when executed by the processor, cause the processor to:

• transmit an identical signal through the at least two separate channels at a same frequency;
• combine the signals from the at least two separate channels so that they constructively and destructively interfere at different frequencies;
• analyze amplitude versus frequency characteristic of the combined signal, wherein when the signals are not matched in phase, delay and amplitude, determine that there is a change in amplitude across the common bandwidth as the combined signals constructively and destructively interfere at different frequencies;
• analyze frequency content of the changing amplitude that represents a rate of constructive and destructive interference;
• and
• determine change in rate of constructive and destructive interference as the amplitude changes between constructive interference and destructive interference to determine an initial estimated delay and phase offset between the at least two separate channels.