• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Annual Allerton Conference on Communication, Control, and Computing; 20040929-1001; Monticello,IL(US) >Learning the Channel at the Transmitter
【24h】

Learning the Channel at the Transmitter

机译：在发射机上学习频道

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Knowledge of accurate and timely channel state information (CSI) at the transmitter is becoming increasingly important in wireless communication systems. For example, recent results in multi-antenna multi-user systems show that large throughput gains are possible when the basestation uses multiple antennas and a known channel to transmit distinct messages simultaneously and selectively to many single-antenna users. In time-division duplex systems, where the basestation and mobiles share the same frequency band for transmission, the basestation can exploit reciprocity to obtain the forward channel from pilots received over the reverse channel. Frequency-division duplex systems are more difficult because the basestation transmits and receives on different frequencies and therefore cannot use the received pilot to infer anything about the multi-antenna transmit channel. Nevertheless, we show that the time occupied in frequency-duplex CSI transfer is generally less than one might expect, and falls as the number of antennas increases. Our approach uses linear analog modulation which avoids digitizing and coding the channel state information and therefore can convey information very rapidly and can be readily analyzed.
机译：在无线通信系统中，对发射机准确而及时的信道状态信息（CSI）的了解变得越来越重要。例如，多天线多用户系统中的最新结果表明，当基站使用多个天线和一个已知信道同时向多个单天线用户选择性地同时发送不同消息时，可能会获得较大的吞吐量。在时分双工系统中，基站和移动站共享相同的频带进行传输，基站可以利用互惠性从在反向信道上接收的导频中获得前向信道。频分双工系统更加困难，因为基站在不同的频率上进行发送和接收，因此无法使用接收到的导频来推断有关多天线发射信道的任何信息。但是，我们表明，双工CSI传输中占用的时间通常少于预期的时间，并且随着天线数量的增加而减少。我们的方法使用线性模拟调制，可以避免对信道状态信息进行数字化和编码，因此可以非常快速地传达信息，并且可以轻松进行分析。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号