Our problem is, roughly speaking, to estimate the reflection channel (boldsymbol h_{1}^{ k)}), sometimes called the main reflection channel, because the reflectivity and velocity are directly related with the amplitude and phase of (boldsymbol h_{1}^{ k)}) as shown in (3)–(6).
In Set A, in order to make the analysis simple and clear, we assume that the main reflection channel (boldsymbol h_{1}^{ k)}) consists of two steps of reflectivity ("high" and "low") and only the interference from Radar-2 exists.
(B) Nonetheless, it is not reasonable to consider the MF output as a good approximation to the main reflection channel.
The intensity of diffuse scattering, arising due to static displacements of atoms, increases when approaching to the main reflection.
The main reflection peak of the XRD pattern at 2θ = 43° can be attributed to (200) plane.
e Estimate |y av |2 of the squared amplitude (left |boldsymbol h_{1}^{ k)}right |^{2}) of the main reflection channel.
As we will show in the next section, the iterative sidelobe removal procedure produces an output y (k) which approximates the main reflection channel (boldsymbol h_{1}^{ k)}).
As discussed in Section 3.2, the difference between the main reflection channel and MF output comes from three factors: the distortion from autocorrelation sidelobe, residual interferences from other radars, and noise.
Fig. 5 Output of each processing step when SIR = 29 dB for Set A. a Channel amplitudes: the main reflection channel (left |boldsymbol h_{1}^{ k)}right |) (dotted line), and interfering channel (solid line).
The main reflection peaks of the RIGO-4, RIGO-8, and RIGO-12 appear at 11.3°, 9.5°, and 7.2°, with corresponding interplanar distances of 0.79, 0.94, and 1.24 nm (Table 1), respectively.
