{'fraction_non_alphanumeric': 0.021052631578947368, 'fraction_numerical': 0.0, 'mean_word_length': 5.4491525423728815, '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}}
Convergence Thresholds Analysis of Iterative Multi-User Detection

In this paper, we analyze the convergence behavior of an iterative (turbo) multi-user detection turbo-coded CDMA system. A recently proposed method to analyze the convergence behavior of turbo architectures is variance exchange graph which uses the error variances of bits as a parameter to visualize the convergence behavior of iterative structures. It provides helpful design guidelines for iterative multi-user detection systems. In this paper, using the variance exchange graph, the possibility of convergence to the single-user performance in terms of two parameters, signal to noise ratio and number of users, is predicted and analyzed. The predicted results are validated by simulations