Superposition based direct downlink channel state information feedback method
A low cost, real-time feedback method for downlink channel state information （DL-CSI） was proposed. DL-CSI was superimposed with uplink user sequences （UL-US） before transmission and thus exclusive occupation of system resources could be avoided. With guaranteed UL-US SER performance and DL-CSI esti...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2009-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74651591/ |
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| Summary: | A low cost, real-time feedback method for downlink channel state information （DL-CSI） was proposed. DL-CSI was superimposed with uplink user sequences （UL-US） before transmission and thus exclusive occupation of system resources could be avoided. With guaranteed UL-US SER performance and DL-CSI estimation accuracy, higher spectral efficiency could be achieved by sacrificing some UL-US’s symbol error rate （SER） performance. Due to spreading processing, DL-CSI could be accurately recovered even with little allocated energy. Simulations demonstrated the practicability of the proposed method. |
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| ISSN: | 1000-436X |