{'fraction_non_alphanumeric': 0.012345679012345678, 'fraction_numerical': 0.0, 'mean_word_length': 5.822429906542056, '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}}
Parameter Estimation and Analysis of LFM Signal Based on Cyclic-Correlation Transform in Multipath Case

Discussed in this paper is the parameter estimation problem of complex LFM signals based on cyclic-correlation transform under multipath conditions. First, we analyzed the cyclic statistics of complex LFM signals and constructed the estimator combining signal separation technology for cycle frequency domain with autocorrelated cyclic correlation amplitude, then, we analyzed the performances of the estimator and deduced the expression of error variance of chirp-rate estimate, and finally we worked out the characteristics of the estimator through computer simulation. The result is in agreement with the analytic results