Page 21 - Fundamentals of Radar Signal Processing

χ out Output signal-to-noise ratio
χ ∞ Signal-to-noise ratio with perfect noise level estimate

χ Σ Lobing antenna sum channel signal-to-noise ratio
δ Grazing angle

δ[·] Discrete impulse function
δθ Target angle relative to boresight

δ (·) Dirac impulse (“delta”) function
D
δR Range error
δt Differential delay

Δθ Angular resolution, lobing antenna squint
Δψ Change in squint angle

ΔCR Cross-range resolution
ΔF Frequency step size

ΔF D Doppler frequency resolution
Δh Height displacement

ΔR Range resolution
ΔR b Range relative to central reference point

ΔR c Range curvature
ΔR s Range bin spacing

ΔR w Range walk
Δt Time resolution

Δt b Time relative to central reference point delay

ε I/Q amplitude mismatch
ε Δ/Σ Error in lobing antenna ratio voltage υ Σ/Δ
ϕ Elevation angle; phase; baseband received signal phase

Non-baseband received signal phase

ϕ 3 3-dB elevation beamwidth
ϕ fg Interferometric phase difference

ϕ max Maximum quadratic phase error
ϕ n Subpulse phase in phase-coded waveform

ϕ nn Null-to-null elevation beamwidth
γ Q channel DC offset; interferogram coherence

Γ Tracking index; gamma function
η Volume reflectivity

I channel DC offset; Doppler spectrum oversampling
κ
factor; adaptive filter scale factor

(a\b) Likelihood function for parameter a given data b