| 异步多径CDMA系统中的线性判决反馈多用户检测 |
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| 引用本文： | 李刚,李道本. 异步多径CDMA系统中的线性判决反馈多用户检测[J]. 北京电子科技学院学报, 2004, 12(2): 82-86 |
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| 作者姓名： | 李刚 李道本 |
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| 作者单位： | 北京邮电大学电信工程学院,北京,100876;北京邮电大学电信工程学院,北京,100876 |
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| 摘 要： | 设计CDMA最佳接收机要考虑的重要因素是减少和消除系统中存在的符号间干扰(ISI)及多址干扰(MAI).干扰的消除可由均衡及多用户检测技术来实现.本文针对异步CDMA的上行链路系统模型,以最小均方误差(MMSE)作为检测准则,采用并行的部分判决反馈方法进行干扰抵消,推导出一种能同时消除ISI并且极大限度抑制MAI的判决反馈型多用户检测器结构,并通过仿真证明其具有比传统线性检测器更为优良的抗干扰性能.
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| 关 键 词： | 多用户检测 判决反馈 MMSE 异步CDMA 干扰抵消 |
| 文章编号： | 1672-464X(2004)02-0082-05 |
| 修稿时间： | 2004-01-14 |
Linear Decision Feedback for Multiuser Detection in Asynchronous Code-Division Multiple-Access Systems |
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| Li Gang,Li Daoben. Linear Decision Feedback for Multiuser Detection in Asynchronous Code-Division Multiple-Access Systems[J]. Journal of Beijing Electronic Science & Technology Institute, 2004, 12(2): 82-86 |
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| Authors: | Li Gang Li Daoben |
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| Abstract: | The interference cancellation or suppression is an important factor for the design of optimum CDMA receiver. It can be achieved by equalization as well as multi-user detection technique. Based on the up-link asynchronous CDMA model, a MMSE-based decision-feedback detector which can eliminate ISI and greatly suppress MAI is introduced in this paper. The simulation test proved that this detector could greatly suppress interference as compare to traditional linear detectors. |
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| Keywords: | Multiuser detection Decision-Feedback Minimum-Mean-Square Error Asynchronous-CDMA Interference Cancellation |
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