全双工通信射频域自干扰抑制量对数字域自干扰抑制能力的影响

doi:10.11999/JEIT160967

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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.

Key words： Co-time Co-frequency Full Duplex (CCFD) Digital self-interference cancellation RF self-interference cancellation Channel estimation

Received: 26 September 2016 Published: 21 March 2017

PACS:

TN92

Fund:

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

Corresponding Authors: SHAO Shihai E-mail: ssh@uestc.edu.cn

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	LI Si
	LU Hongtao
	SHAO Shihai
	TANG Youxi

Cite this article:

LI Si,LU Hongtao,SHAO Shihai等. Impact of the Amount of RF Self-interference Cancellation on Digital Self-interference Cancellation in Full Duplex Communications[J]. JEIT, 2017, 39(6): 1278-1283.

URL:

http://jeit.ie.ac.cn/EN/10.11999/JEIT160967 OR http://jeit.ie.ac.cn/EN/Y2017/V39/I6/1278

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