Multiuser detector based on wavelet networks |
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引用本文: | 王伶,焦李成,陶海红,刘芳. Multiuser detector based on wavelet networks[J]. 系统工程与电子技术(英文版), 2004, 15(3) |
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作者姓名: | 王伶 焦李成 陶海红 刘芳 |
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基金项目: | This project was supported by the National Natural Science Foundation of China (60073053,60133010). |
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摘 要: | Multiple access interference (MAI) and near-far problem are two major obstacles in DS-CDMA systems. Combining wavelet neural networks and two matched filters, the novel multiuser detector, which is based on multiple variable function estimation wavelet networks over single path asynchronous channel and space-time channel respectively is presented. Excellent localization characteristics of wavelet functions in both time and frequency domains allowed hierarchical multiple resolution learning of input-output data mapping. The ma thematic frame of the neural networks and error back ward propagation algorithm are introduced. The complexity of the multiuser detector only depends on that of wavelet networks. With numerical simulations and performance analysis, it indicates that the multiuser detector has excellent performance in eliminating MAI and near-far resistance.
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Multiuser detector based on wavelet networks |
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Abstract: | Multiple access interference (MAI) and near-far problem are two major obstacles in DS-CDMA systems. Combining wavelet neural networks and two matched filters, the novel multiuser detector, which is based on multiple variable function estimation wavelet networks over single path asynchronous channel and space-time channel respectively is presented. Excellent localization characteristics of wavelet functions in both time and frequency domains allowed hierarchical multiple resolution learning of input-output data mapping. The ma thematic frame of the neural networks and error back ward propagation algorithm are introduced. The complexity of the multiuser detector only depends on that of wavelet networks. With numerical simulations and performance analysis, it indicates that the multiuser detector has excellent performance in eliminating MAI and near-far resistance. |
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Keywords: | DS-CDMA multiuser detector space-time filter multiple access interference wavelet networks. |
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