Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/2410
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Type: | Journal article |
Title: | Receivers with chip-level decision feedback equalizer for CDMA downlink channels |
Author: | Choi, J. Kim, S. Lim, C. |
Citation: | IEEE Transactions on Wireless Communications, 2004; 3(1):300-314 |
Publisher: | Institute of Electrical Electronics Engineers Inc (IEEE) |
Issue Date: | 2004 |
ISSN: | 1536-1276 1558-2248 |
Statement of Responsibility: | Jinho Choi, Seong Rag Kim and Cheng-Chew Lim |
Abstract: | For the code division multiple access (CDMA) downlink channel, we investigate the decision feedback equalizer (DFE) at chip-level to effectively suppress multiple-access interference (MAI) when the spreading sequences are orthogonal. The structure of the receiver with the chip-level DFE has been investigated and the minimum mean-square error solution has been derived. Due to the inherent structure of the chip-level DFE, some iterative techniques with hard and soft decisions have been proposed. It is shown that the proposed receivers with the chip-level DFE can provide satisfactory performance. In comparison with the adaptive chip-level linear equalizer, the number of users can be doubled by using adaptive chip-level DFE at a bit-error rate of 10/sup -3/. Throughout the paper, we assume that scrambled orthogonal codes are used for spreading sequences. |
Keywords: | Code-division multiple-access (CDMA) decision feedback equalizer (DFE) downlink interference suppression iterative technique |
Rights: | Copyright © 2004 IEEE |
DOI: | 10.1109/TWC.2003.819029 |
Published version: | http://dx.doi.org/10.1109/twc.2003.819029 |
Appears in Collections: | Aurora harvest 2 Electrical and Electronic Engineering publications |
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hdl_2410.pdf | 778.25 kB | Publisher's PDF | View/Open |
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