| Blind Multiuser Receivers for ISI CDMA Channels Using the ε-Approximation Algorithms |
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| 作者姓名： | ZHANG Zhi Yong LING Yun |
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| 作者单位： | Department of Electronic Engineering，Nanjing University of Posts and Telecommunications，Najing 210003，P. R. China |
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| 基金项目： | TheworkissupportedbyNNSFofP.R .China(No.60 1 72 0 58) |
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| 摘 要： | 1 ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｒｅｉｓｃｕｒｒｅｎｔｌｙａｓｉｇｎｉｆｉｃａｎｔｉｎｔｅｒｅｓｔｉｎｔｈｅｄｅｓｉｇｎｏｆｈｉｇｈ ｒａｔｅｗｉｒｅｌｅｓｓＣｏｄｅＤｉｖｉｓｉｏｎＭｕｌｔｉｐｌｅＡｃｃｅｓｓ (ＣＤＭＡ)ｎｅｔｗｏｒｋｓ1 ,9～1 0 ] .ＩｎｔｈｉｓＣＤＭＡｓｙｓｔｅｍ ,ｅａｃｈｕｓｅｒｉｓａｓｓｉｇｎｅｄａｕｎｉｑｕｅｓｉｇｎａｔｕｒｅｗａｖｅｆｏｒｍｔｈａｔｉｓｕｓｅｄｔｏｍｏｄｕｌａｔｅｉｔｓｔｒａｎｓｍｉｔｔｅｄｓｙｍｂｏｌｓ.Ｉｔｉｓ,ｈｏｗｅｖｅｒ,ｎｏｔｐｏｓｓｉｂｌｅｔ…
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| 关 键 词： | ε-approximation algorithms |
Blind Multiuser Receivers for ISI CDMA Channels Using the ε-Approximation Algorithms |
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| ZHANG Zhi Yong,LING Yun.Blind Multiuser Receivers for ISI CDMA Channels Using the ε-Approximation Algorithms[J].The Journal of China Universities of Posts and Telecommunications,2002,9(4). |
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| Authors: | ZHANG Zhi-Yong LING Yun |
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| Abstract: | The problem of the blind demodulation of multiuser information symbols in a high-rate Code Division Multiple Access (CDMA) network in the presence of InterSymbol Interference (ISI) is of considerable interest. The dispersive CDMA channel is first cast into a Multiple-Input Multiple-Out (MIMO) signal model framework. Then, the problem of the blind channel equalization and multiuser detection is considered. In this paper, we formulate the problem of blind channel estimation and signal detection into a quadratic programming with binary constraints. Then, the efficient ε-approximation algorithms are presented and applied to find the solution to the quadratic programming. The proposed approach does not estimate the channel directly or rely on any statistics. Simulation results support our theoretical analysis. |
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| Keywords: | approximation algorithms high rate CDMA ISI channel MIMO |
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