| 摘要: |
| 在分析一种多基站分布式协作下行传输系统结构及其信号传输特性基础上，研究了
多基站分布式下行协作中利用信道时间相关性的低速率有效反馈机制，并给
出了基于量化码本空间码字索引重排获得一新码本的构造与实现算法。此外，还讨论了反馈
误差对系统性能的影响。通过性能分析可知，相对于多基站集中调度协作系统而言，基于有
效反馈机制的多基站分布式协作模式所引起的系统性能损失在低误比特率时并不明显，且可
通过适当的码本优化设计以及反馈误差保护措施进一步减小反馈误差对系统性能的影响。 |
| 关键词: MIMO系统 协作通信 信道状态信息 有限反馈 误差概率 |
| DOI： |
|
| 基金项目:国家高技术研究发展计划(863计划)项目（2009AA01Z234） |
|
| Efficient feedback strategies and errors effect over multiple base-stations distributed cooperative transmission |
| XIAO Shang-hui |
| () |
| Abstract: |
| A new framework structure and its signal transmission properties are
analysed for multiple base-stations distributed cooperative down trans
mission systems. Efficient feedback strategies and new codebook construction alg
orithms via resorting the order of the codeword in the initial quantization code
book are presented by exploiting the temporal correlation of the channel, and th
en limited feedback errors effect on system performance are discussed. Analysis
resu
lts show that the proposed scheme gives rise to little degradation on the achiev
able sum-rate compared with the cooperative communication systems with the need
of
central control unit and low-latency backhaul links on exchanging channel state
information (CSI) and data, which can be eliminated with a more proper codebook
design and the addition of feedback error detection/correction techniques. |
| Key words: MIMO system cooperative communication CSI limited feedback error probability |
《电讯技术》编辑部 