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Table 1 Notational conventions

From: On the use of calibration emitters for TDOA source localization in the presence of synchronization clock bias and sensor location errors

Notation Explanation
Kronecker product
I n n × n identity matrix
O n ×  m n × m matrix of zeros
1 n ×  m n × m matrix of ones
blkdiag[A1A2An] A block diagonal matrix with matrices {Ak}1 ≤ k ≤ n on the main diagonal
rank[A] Rank of matrix A
rank[A] Linear subspace spanned by the column vectors of matrix A
A 1/2 Square root of matrix A
A Moore–Penrose inverse of matrix A
Π[A] Orthogonal projection matrix onto the orthogonal subspace of range[A]