{'fraction_non_alphanumeric': 0.044444444444444446, 'fraction_numerical': 0.0, 'mean_word_length': 5.09009009009009, '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}}
Tracking performance of coherent decision-directed delay-locked loop in quasi-synchronous CDMA

In direct sequence code-division multiple access (DS-CDMA), the multiuser interference can be substantially reduced when the users are quasi-synchronized and special symbol-length sequences are used. If a conventional noncoherent delay-locked loop (DLL) is used in quasi-synchronous CDMA (QS-CDMA), its code tracking may be impossible. We propose the coherent decision-directed DLL (CDD-DLL) as a code tracking scheme for QS-CDMA using symbol-length spreading sequences and analyze its performance. It is shown that the CDD-DLL is an appropriate code tracking scheme for QS-CDMA.