Multi-Parameter Adaptive Notch Filter (MPANF) for Enhanced Interference Mitigation

Architecture of the MPANF with its subcomponents and interfaces: The interfaces are indexed according to the filter stage (i.e., primary, secondary, or tertiary notch filter).

Flow diagram of the ANF with the notch filter and the FLL

Magnitude of the transfer function for different k_α values with a = 1

Phase of the transfer function for different k_α values with a = 1

Magnitude of the transfer function for different a values with k_α = 0.8

Phase of the transfer function for different a values with k_α = 0.8

Architecture of the LBCA, including the preprocessing and postprocessing stages

Normalized weighting function of the LBCA for the MPANF

Power delta to notch filter gain mapping

Adaptive gain flow diagram

Cutoff frequency for a specified pole-contraction factor estimation error for a 20-MHz sampled notch filter

Pole-contraction factor estimation for a 20-MHz sampled notch filter

Pole-contraction factor estimation error for a 20-MHz sampled notch filter

Zero-pole plot on the complex plane for different pole-contraction factor changes from k₀ to k₁ with a = 1

Magnitude of the transfer function for different pole-contraction factor changes from k₀ to k₁ with a = 1

Phase of the transfer function for different pole-contraction factor changes from k₀ to k₁ with a = 1

Spectrogram of a continuous chirp with 12-MHz bandwidth and 20-us repetition rate

Frequency estimate of the primary and secondary FLLs compared with the instantaneous frequency for a continuous chirp

Loop bandwidth estimate for the primary and secondary LBCA with a continuous chirp

Amplitude and pole-contraction factor estimated with a continuous chirp

Spectrogram of a pulsed chirp with a 15-MHz bandwidth and 20-us repetition rate

Frequency estimate of the primary and secondary FLLs compared with the actual instantaneous frequency for a pulsed chirp of Figure 22

Loop bandwidth estimate for the primary and secondary LBCA with a pulsed chirp

Amplitude and pole-contraction factor estimated with a continuous chirp

Flow diagram of the test setup

Alpha mean α_mean for a 50-us continuous chirp without pulse blanker

Alpha mean α_mean for a 50-us continuous chirp with pulse blanker

Alpha mean α_mean for a 1-ms continuous chirp with pulse blanker

Alpha mean α_mean for a 50-us-pulsed chirp with pulse blanker

Alpha mean α_mean for 1-ms-pulsed chirp with pulse blanker

Delta alpha mean, Δα_mean, for continuous chirps with pulse blanker for the MPANF

Delta alpha mean, Δα_mean, for pulsed chirps with pulse blanker for the MPANF

10-us continuous chirp without pulse blanker

10-us continuous chirp with pulse blanker

10-us-pulsed chirp with pulse blanker

20-us continuous chirp without pulse blanker

20-us continuous chirp with pulse blanker