Time Difference of Arrival (TDOA) is characterized by which description?

Time Difference of Arrival (TDOA) is characterized by which description?

• A. Doppler shifts indicate velocity differences
• B. Same signal, multiple receive sensors; yields isochrone; time of transmission unknown; receive sensor locations known
• C. Encryption keys must be exchanged
• D. It requires a single receiver

Answer: (B)

Time Difference of Arrival uses when a signal arrives at several receivers to locate its source. Because the exact transmission time is unknown, you rely on differences in arrival times across multiple sensors with known locations. The set of points that share the same arrival-time difference forms an isochrone (a hyperbola in 2D). With at least two receivers, each pair defines such a curve, and their intersections help pinpoint the transmitter. The other ideas don’t fit TDOA: Doppler shifts relate to motion, encryption keys are unrelated, and a single receiver cannot determine position from arrival-time differences.

Time Difference of Arrival uses when a signal arrives at several receivers to locate its source. Because the exact transmission time is unknown, you rely on differences in arrival times across multiple sensors with known locations. The set of points that share the same arrival-time difference forms an isochrone (a hyperbola in 2D). With at least two receivers, each pair defines such a curve, and their intersections help pinpoint the transmitter. The other ideas don’t fit TDOA: Doppler shifts relate to motion, encryption keys are unrelated, and a single receiver cannot determine position from arrival-time differences.