A Signal Processing Algorithm Based on 2D Matched Filtering for SSAR

Table 1

Parameter values for SSAR signal processing simulations.

Radar parameters
Carrier frequency	300 MHz
PRI	1,000 μs
Pulse width ()	100 μs
Bandwidth ()	10 MHz
Rotational speed of the sector-scan antenna ()	36°/s
3 dB beam width	30°
Transmitting signal power ()	10 kW
Transmitting antenna gain ()	30 dB
Receiving antenna gain ()	30 dB
Initial angle of the antenna rotation	0°
Line-scan range of the antenna	[1.8, 1.5] wavelength/2
Line-scan cycle of the antenna	PRI
Target parameters (true values)
Number	4
Slant range	[, 100, 103, 105] km
Azimuth	[18, 20.5, 22, 24]°
Velocity	[, 150, 180, 200] m/s
Target heading angle (relative to the radial direction)	[, 0, 0, 0]°
RCS	[0.1, 0.1, 0.1, 0.1] m^2
Simulation parameters
SNR (receiving point)	−33 dB
Range window	[0.6, 0.76] PRI /2 km
Azimuth window	[, 42]°
Signal format	LFM in the exponential form
Sampling rate (range dimension)	1.2B (analytic signals)

Notes. The noise is assumed to be Gaussian white noise; transmission losses are not considered but can be included in the SNR; and the false-alarm probability is set to 10⁻⁶ for range detection. 1.2B: 1.2 times bandwidth (B).