Monopulse radar detection and localization of multiple targets via joint multiple-bin processing

Detection and Localization of Multiple Unresolved Extended Targets via Monopulse Radar Signal Processing

“…In [36] the ML computation of [34] is made explicit, and hence competitive with [10] in terms of numerical needs. Interestingly, it can be shown (using the approach from [40] and [41]) that the above works with unresolved targets can identify no more than two targets. This limit is imposed by the lack of observation information diversity within their models.…”

“…Their method utilizes the spatial diversity from the nature of a rotating radar to detect and localize more than two targets; its processing strategy is similar to that of [40] and [41]. Brown et al [12] explore spatial diversity for a monopulse radar to estimate the DOA of more than two unresolved targets.…”

“…However, it was recently found [40][41] that target spillover ought to be considered. The monopulse returns from two -or more -consecutive matched filter sampling points are jointly processed by a maximum likelihood estimator to provide angles and sub-bin range estimates.…”

“…The method in [40][41] can be categorized as a a super-resolution technique [6] [14][26] [35]. 1 For a single target the usual approach is to use only the real part of the monopulse ratio.…”

“…The techniques in [40], [41] and this paper, are designed for monopulse radars depicted in Figure 1. Note that with SAR, both the range and cross-range resolutions are good while the crossrange resolutions for conventional monopulse radars are typically much worse than the range resolution.…”