“…The blind code detection task has been shown to be NP-hard in general [1], [2], so that heuristic algorithms are used in practice. For example, various methods have been proposed for the blind detection of Hamming and BCH codes (e.g., [3], [4] and references therein), convolutional codes (e.g., [5], [6] and references therein), Turbo codes (e.g., [7], [8] and references therein), and LDPC codes (e.g., [9], [10] and references therein). However, so far, the blind detection of polar codes, which were recently included in the 5G standard, has received little attention [11]- [13].…”