| ANALYSIS OF A CUMULANT-BASED 2D-RAKE RECEIVER FOR CDMA SYSTEM OVER FREQUENCY-SELECTIVE FADING CHANNELS |
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| 引用本文： | 杨维,程时昕. ANALYSIS OF A CUMULANT-BASED 2D-RAKE RECEIVER FOR CDMA SYSTEM OVER FREQUENCY-SELECTIVE FADING CHANNELS[J]. 西安交通大学学报(英文版), 2003, 15(2) |
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| 作者姓名： | 杨维 程时昕 |
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| 作者单位： | School of Electronics and Information Engineering，Northern Jiaotong University，National Mobile Communications Research Laboratory，Southeast University Beijing 100044，China，Nanjing 210096，China |
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| 基金项目： | ThisworkwassupportedbytheOpenFoundationofNationalMobileCommunicationsResearchLaboratory，SoutheastUniversity(No .1 0 5) . |
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| 摘 要： | Code divisionmultipleaccess (CDMA )isaspread spectrummultipleaccessschemethatisex pectedtogainasignificantshareofthecellularmar ket.CDMAhasseveralattractivepropertiesforper sonalcommunications.Andifallmobileradiosig nalsarrivingatthebasestationaresynchronizedtowithinafraction ,thesynchronousCDMA (S CD MA)systemscanenhancethebandwidthefficiencytoa greaterdegreebyemployingorthogonalcodewords.However,S CDMAsystemshavefunda mentaldifficultieswhenutilizedinafrequency se lectivefadingenviron…
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ANALYSIS OF A CUMULANT-BASED 2D-RAKE RECEIVER FOR CDMA SYSTEM OVER FREQUENCY-SELECTIVE FADING CHANNELS |
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| Yang Wei,Cheng Shixin School of Electronics and Information Engineering,Northern Jiaotong University,Beijing ,China.. ANALYSIS OF A CUMULANT-BASED 2D-RAKE RECEIVER FOR CDMA SYSTEM OVER FREQUENCY-SELECTIVE FADING CHANNELS[J]. Academic Journal of Xi’an Jiaotong University, 2003, 15(2) |
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| Authors: | Yang Wei Cheng Shixin School of Electronics Information Engineering Northern Jiaotong University Beijing China. |
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| Affiliation: | 1. School of Electronics and Information Engineering,Northern Jiaotong University,Beijing 100044, China
2. National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China |
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| Abstract: | The conventional 2D Rake receivers for code division multiple access (CDMA) system over frequency selective fading channels are generally based on the second order statistics while assuming perfect array conditions. However, the sensor response, location uncertainty, and the use of sample statistics can severely degrade the performance of second order statistics processing. And in practical application, it is impossible to calibrate the array frequently. In this paper a cumulant based 2D Rake receiver for synchronous CDMA system with decorrelator is presented. Decorrelating is a multi user detection approach that not only provides a fundamental solution to the mutual interference problem in CDMA communications but also makes it convenient for the decoupled signal to be processed spatially and temporally. High order signal processing has some inherent advantages over that of second order. Employing second order statistics it is impossible to estimate source steering vector blindly, while employing higher than second order cumulants, this purpose can be achieved. The performance analysis shows that employing cumulant based signal processing technique the proposed 2D Rake receiver is blind and demonstrates excellent performance. |
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| Keywords: | Code division multiple access (CDMA) cumulant 2D Rake receiver |
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