{'fraction_non_alphanumeric': 0.02416918429003021, 'fraction_numerical': 0.004531722054380665, 'mean_word_length': 5.138888888888889, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 1, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A subspace rotation-based technique for estimating 2-D arrival angles using nonlinear array configurations

This paper presents a subspace rotation based method to estimate 2-D direction-of-arrival (DOA) angles of narrowband signals radiated by far-field sources using planar and volume arrays. The new approach automatically pairs 2-D DOA angles by computing them directly from the normalized eigenvectors of a newly derived signal space matrix (SSM). This eliminates the constraint on subarray spacing and the need for a search procedure. Other advantages include adjustability in the accuracy of the DOA angles and maximum detectability of the master array. >