Which among the following is not a common feature between the time of arrival and time difference of arrival?(a) Straight-line of sight(b) High resolution system clock(c) Propagation at speed of light(d) Shape of curveI had been asked this question in unit test.I'd like to ask this question from Next Generation Wireless Network topic in portion Next Generation Wireless Network of Cognitive Radio

Which among the following is not a common feature between the time of

1.	Which among the following is not a common feature between the time of arrival and time difference of arrival?(a) Straight-line of sight(b) High resolution system clock(c) Propagation at speed of light(d) Shape of curveI had been asked this question in unit test.I'd like to ask this question from Next Generation Wireless Network topic in portion Next Generation Wireless Network of Cognitive Radio
Answer» Correct option is (d) Shape of curve To explain: Time of arrival and time difference of arrival are two time-based approaches. Both approaches REQUIRE a high-resolution SYSTEM clock with SIGNALS that propagate at the speed of light. It requires a straight line of SIGHT PATH as the signal delay directly relates to the line of sight distance.

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