| an, bn |
Fourier coefficients |
| AiCm, AiSm, |
Cross-interference coefficients |
| AmCi, AmSi |
|
| ADC |
Analog-to-digital converter |
| BiCm, BiSm, |
Cross-interference coefficients |
| BmCi, BmSi |
|
| Cx(t) |
Autocovariance function |
| Cov[x, y] |
Covariance between x and y |
| d |
Distance between sensors |
| DAC |
Digital-to-analog converter |
| DASP |
Digital alias-free signal processing |
| DFT |
Discrete Fourier transform |
| DOA |
Direction of arrival |
| DSP |
Digital signal processing |
| E[ ] |
Expected value of [ ] |
| f |
Frequency (Hz) |
| fs |
Sampling frequency (Hz) |
| FFT |
Fast Fourier transform |
| Gxx(f) |
Autospectral density function |
| IDFT |
Inverse discrete Fourier transform |
| IFFT |
Inverse fast Fourier transform |
| mx |
Mean value of x(t) |
| nk,nx,ny |
Number of threshold levels |
| N |
Number of samples; number of sensors in an array |
| p(t) |
Probability density function |
| p(x, y) |
Two-dimensional probability density function |
| P |
Mean power |
| PRNG |
Pseudo-random number generator |
| q |
Quantization step |
| RF |
Radio frequencies |
| Rs(iΔf,t), |
Periodic rectangular functions |
| Rc(iΔf,t) |
|
| SFDR |
Spurious-free dynamic range |
| SNR |
Signal-to-noise ratio |
| t |
Time variable |
| tk |
Time instants |
| tβ |
Half of confidence interval corresponding to confidence probability β |
| TDC |
Time-to-digital converter |
| Var [ ] |
Variance of [ ] |
| x(t), y(t) |
Signals |
| X(ω), Y(ω) |
Fourier transforms of x(t) and y(t) respectively |
| αi,βi |
Coefficients characterizing signal decomposition in a rectangular function basis |
| δ |
Smallest interval on a time grid |
| δ( ) |
Delta function |
| ΔT |
Fraction of a period |
| Δt |
Time interval |
| Δφ |
Phase angle shift |
| {∊k} |
Quantization noise |
| θ |
Observation time of x(t) |
| Θi |
Arrival angle of ith signal |
| λ |
Wavelength |
| μ |
Mean value of time intervals τk |
| ξk |
Pseudo-random numbers |
| ξ(t) |
Noise |
| ρ |
Correlation coefficient |
| σ |
Standard deviation of time intervals τk |
| σ2 |
Variance of time intervals τk |
| σ2 |
Variance of quantization error |
| τk |
Random time intervals |
| ∥φ(t)∥ |
Norm of∥ ∥ |
| ω |
Angular frequency |
| ωs |
Angular sampling frequency |
| Ωi |
Wavenumbers |
| [^] |
Estimate of [ ] |
