{'fraction_non_alphanumeric': 0.017341040462427744, 'fraction_numerical': 0.0, 'mean_word_length': 6.144329896907217, '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}}
An improved preamble design for broadcasting signalling with enhanced robustness

In this paper, we propose an improved preamble structure based on distance detection using a pair of training sequences in frequency domain, whereby self-adaptive algorithm is introduced. Guard interval with cyclic prefix (CP) property is used to achieve better signalling transmission performance under frequency selective fading channel. Moreover, delay and differential operation is applied to eliminate continuous wave (CW) interference. Theoretical analyses and simulation results show that the proposed scheme has superior signalling demodulation and synchronization performances to the existing methods.