{'fraction_non_alphanumeric': 0.01838235294117647, 'fraction_numerical': 0.0, 'mean_word_length': 5.2846153846153845, '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}}
Code based channel estimation in VSF-OFCDM systems

This paper deals with an alternative technique to commonly used pilot based training sequence channel estimation for multi-carrier spread-spectrum wireless communication systems. In a system with Code Division Multiple Access (CDMA), the proposed technique exploits one code channel as the training sequence for channel estimation purposes. In a noisy environment, this technique performs better than the pilot based, thanks to the averaging effect of the noise impairment. Simulations are performed using an open VSF-OFCDM simulator developed in Simulink. This is freely available under an academic non-profit license in order to address the common problem of signal processing research where to repeat the work of others is highly demanding or even not possible.