全雙工通信射頻域自干擾抑制量對數(shù)字域自干擾抑制能力的影響

黎斯; 魯宏濤; 邵士海; 唐友喜

doi:10.11999/JEIT160967

全雙工通信射頻域自干擾抑制量對數(shù)字域自干擾抑制能力的影響

doi: 10.11999/JEIT160967

基金項目:

國家自然科學基金(61531009, 61501093, 61271164, 61471108, 61201266)，國家科技重大專項(2014ZX03003001-002)

計量
- 文章訪問數(shù): 1439
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- PDF下載量: 327
- 被引次數(shù): 0
出版歷程
- 收稿日期: 2016-09-26
- 刊出日期: 2017-06-19

Impact of the Amount of RF Self-interference Cancellation on Digital Self-interference Cancellation in Full Duplex Communications

Funds:

The National Natural Science Foundation of China (61531009, 61501093, 61271164, 61471108, 61201266), The National Major Project of China (2014ZX03003001-002)

摘要

摘要: 同時同頻全雙工通信的射頻域自干擾抑制量增加，導致數(shù)字域自干擾信號的信噪比下降，使得數(shù)字域自干擾抑制量減少。針對這一現(xiàn)實問題，該文分析了數(shù)字域自干擾抑制能力與射頻域自干擾抑制量之間的量化關(guān)系，在典型數(shù)字域估計算法下，給出了具體關(guān)系的閉合解。分析與仿真結(jié)果表明，全雙工通信在執(zhí)行射頻域聯(lián)合數(shù)字域自干擾抑制時，射頻域自干擾抑制的增大量總是大于數(shù)字域自干擾抑制能力的減小量，當射頻域自干擾抑制較小時，數(shù)字域自干擾抑制將更有效；過大的射頻域自干擾抑制量將造成數(shù)字域自干擾抑制性能的損失。
- 同時同頻全雙工 /
- 數(shù)字域自干擾抑制 /
- 射頻域自干擾抑制 /
- 信道估計
Abstract: The self-interference signal to noise ratio in digital domain decreases as the amount of RF self-interference cancellation increases in Co-time Co-frequency Full Duplex (CCFD) communications. The amount of digital self-interference cancellation decreases as the digital self-interference power decreases. The impact of the amount of RF self-interference cancellation on digital self-interference cancellation is analyzed. The digital self-interference cancellation is analyzed in this paper based on LS and MMSE channel estimation. It is shown that the decrease in the amount of digital self-interference cancellation is always less than the increase in RF self- interference cancellation when applying digital cancellation after RF cancellation in full duplex communications. Applying digital cancellation after RF cancellation is more useful when RF cancellation delivers poor suppression. The performance of digital self-interference cancellation will degrade when RF cancellation achieves large suppression.
- Co-time Co-frequency Full Duplex (CCFD) /
- Digital self-interference cancellation /
- RF self-interference cancellation /
- Channel estimation

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參考文獻(19)

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