Which method is used to estimate time-difference of arrival and angle of arrival?(a) Optical interferometry(b) Interferometric dynamic measurement(c) Frequency scanning interferometry(d) Phase interferometryThe question was posed to me in an interview for job.Question is taken from Antenna Tradeoffs in section Technology Tradeoffs in Software Defined Radio of Cognitive Radio

Which method is used to estimate time-difference of arrival and angle

1.	Which method is used to estimate time-difference of arrival and angle of arrival?(a) Optical interferometry(b) Interferometric dynamic measurement(c) Frequency scanning interferometry(d) Phase interferometryThe question was posed to me in an interview for job.Question is taken from Antenna Tradeoffs in section Technology Tradeoffs in Software Defined Radio of Cognitive Radio
Answer» Right OPTION is (d) Phase interferometry For explanation: Time-difference of arrival and angle of arrival are determined by phase interferometry. These parameters PLAY an important ROLE in network-based emitter LOCATION techniques.

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