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arXiv 1506.03394cs.ITmath.IT
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基于自由度分析的带内全双工无线空间自干扰隔离

Spatial Self-Interference Isolation for In-Band Full-Duplex Wireless: A Degrees-of-Freedom Analysis

Evan Everett, Ashutosh Sabharwal

摘要:

带内全双工无线通信的挑战是管理自干扰。许多设计已经采用了空间隔离机制,例如屏蔽或多天线波束成形,以将自干扰波与接收器隔离。这样的空间隔离方法是有效的,但是通过将发送和接收信号限制到可用空间的子集,信道的全部空间资源未被充分利用,花费了可能使以全双工模式操作的净益处无效的成本。在本文中,我们利用基于天线理论的信道模型来分析空间自由度可用于全双工功能的基站,并观察到,空间隔离是否优于时分(即半双工)在很大程度上取决于散射体的几何分布。除非散射到预期用户的对象的角展度与反向散射到基站的对象的展度重叠,否则空间隔离优于时分,否则时分可能是最佳的。

英文摘要:

The challenge to in-band full-duplex wireless communication is managing self-interference. Many designs have employed spatial isolation mechanisms, such as shielding or multi-antenna beamforming, to isolate the self-interference wave from the receiver. Such spatial isolation methods are effective, but by confining the transmit and receive signals to a subset of the available space, the full spatial resources of the channel be under-utilized, expending a cost that may nullify the net benefit of operating in full-duplex mode. In this paper we leverage an antenna-theory-based channel model to analyze the spatial degrees of freedom available to a full-duplex capable base station, and observe that whether or not spatial isolation out-performs time-division (i.e. half-duplex) depends heavily on the geometric distribution of scatterers. Unless the angular spread of the objects that scatter to the intended users is overlapped by the spread of objects that backscatter to the base station, then spatial isolation outperforms time division, otherwise time division may be optimal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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