| 一种基于NACK的HSDPA自适应信道质量反馈技术 |
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| 引用本文： | 杨玉东,李方伟.一种基于NACK的HSDPA自适应信道质量反馈技术[J].山西电子技术,2006,5(2):30-32. |
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| 作者姓名： | 杨玉东 李方伟 |
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| 作者单位： | 重庆邮电学院移动通信技术重点实验室,重庆400065 |
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| 摘 要： | 作为一种B3G技术，HSDPA已经受到广泛的关注，该技术可以提供高速的分组下行数据传输。其关键技术包括AMC，HARQ，FCS等。在HSDPA系统中，其调制方式和编码可以随着下行链路的质量状况自适应改变。因此，信道质量反馈就直接影响AMC的准确度和系统的性能。本文介绍了TD—SCDMA模式下HSDPA中CQI的工作机制和一种基于NACK的自适应信道质量反馈技术。
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| 关 键 词： | HSDPA CQIH ARQ AMC NACK |
| 修稿时间： | 2005年11月21 |
An Adaptive On-demand/NACK Channel Quality Feedback Scheme for HSDPA |
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| Yang Yu-dong Li Fang-wei.An Adaptive On-demand/NACK Channel Quality Feedback Scheme for HSDPA[J].Shanxi Electronic Technology,2006,5(2):30-32. |
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| Authors: | Yang Yu-dong Li Fang-wei |
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| Abstract: | As a new B3G technique,high speed download packet access(HSDPA) has been come to attention widely.This enhanced system supplies high packet data rate(max 56 Mbps) on the download.These key techniques include adaptive modulation and coding(AMC),hybrid ARQ(HARQ),fast cellar scheduling(FCS),etc.The modulation scheme and the coding rate are adaptively changed according to the downlink channel quality feedback.Therefore,the channel quality indication(CQI) reported scheme is directly related to the accuracy of AMC and the performance of HSDPA.In this paper,a work mechanism of CQI for TD-SCDMA and a adaptive on-demand/NACK channel quality feedback scheme is introduced. |
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| Keywords: | HSDPA CQI HARQ AMC NACK |
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