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

LI Si; LU Hongtao; SHAO Shihai; TANG Youxi

doi:10.11999/JEIT160967

Volume 39 Issue 6

Jun. 2017

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Article Navigation > Journal of Electronics & Information Technology > 2017 > 39(6): 1278-1283

LI Si, LU Hongtao, SHAO Shihai, TANG Youxi. Impact of the Amount of RF Self-interference Cancellation on Digital Self-interference Cancellation in Full Duplex Communications[J]. Journal of Electronics & Information Technology, 2017, 39(6): 1278-1283. doi: 10.11999/JEIT160967

Citation:

LI Si, LU Hongtao, SHAO Shihai, TANG Youxi. Impact of the Amount of RF Self-interference Cancellation on Digital Self-interference Cancellation in Full Duplex Communications[J]. Journal of Electronics & Information Technology, 2017, 39(6): 1278-1283. doi: 10.11999/JEIT160967

Citation:

LI Si, LU Hongtao, SHAO Shihai, TANG Youxi. Impact of the Amount of RF Self-interference Cancellation on Digital Self-interference Cancellation in Full Duplex Communications[J]. Journal of Electronics & Information Technology, 2017, 39(6): 1278-1283. doi: 10.11999/JEIT160967

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

doi: 10.11999/JEIT160967

Funds:

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

Received Date: 2016-09-26
Publish Date: 2017-06-19

Abstract

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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References(19)

References

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