Observation budget
Joint marginal standard-deviation bounds
| Unknown parameter | Lower bound |
|---|
Conditional, local noise bounds for one static coherent path. A small value is not predicted hardware accuracy. Missing rank is reported as unidentifiable, not as a zero from a pseudoinverse.
Full Fisher information and model
μmnk = sk α exp(−j2π fk τa) (wnHar) (atHvm)
J = 2 Re(DHC−1D)
Normalized derivative similarity Jᵢⱼ/√(JᵢᵢJⱼⱼ), not estimator correlation. Export contains the unnormalized matrix. Order: delay, AoA az/el, AoD az/el, loss, phase.
Unit-modulus steering vectors; unit-norm analog weights. Spatially white pre-combining noise. Equal-power contiguous pilot tones. Narrowband array steering at the carrier; ideal phase shifters; known calibration. All complex I/Q is retained. No CP, switching gaps, motion, beam squint, phase drift or extra RF losses are simulated. The gain and phase are unknown nuisance parameters. Apparent delay includes receiver clock bias.
Changing beam density at fixed transmit power increases total acquisition energy and duration; it is not a fixed-energy comparison.