{'fraction_non_alphanumeric': 0.026030368763557483, 'fraction_numerical': 0.0, 'mean_word_length': 5.507042253521127, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, '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}}
Orthogonal AMP Detection Techniques for Massive Access Over OFDM

We consider the joint activity detection and channel estimation for massive connectivity in MIMO-OFDM systems. An OAMP-MMV algorithm (see definitions in Sec. I) is employed. Different error orthogonality requirements of such MIMO-OFDM systems are studied and evaluated. Simulation results confirm the potential advantages of multi-carrier joint transmission, especially in an indoor environment.