“…Based on [2], there has been a surge of interest in extending the PCRLB to more practical scenarios, e.g., to include measurement origin uncertainty [17,18], to consider issues related to the quantization of sensor data, to compute approximated online PCRLB [19], and to derive online conditional PCRLB [20]. Subsequently, the PCRLB theory has been extended to several applications, e.g., for adaptive resource management [14], dynamic sensor selection [15], bearing-only tracking [21], and multiple-target tracking [22]. As stated earlier, previous derivations of the PCRLB are limited to the centralized and hierarchical estimation architectures [15], and only recently has a suboptimal PCRLB expression [16] been derived for the decentralized architectures.…”