Channel Estimation for Self-Interference Cancellation in Full-Duplex Wireless Systems
- Authors
- Kim, Yong-Hwa; Lee, Jong-Ho
- Issue Date
- Dec-2015
- Publisher
- SPRINGER
- Keywords
- Full duplex radios; Analog cancellation; Channel estimation; Orthogonal frequency division multiplexing (OFDM)
- Citation
- WIRELESS PERSONAL COMMUNICATIONS, v.85, no.3, pp.1139 - 1152
- Journal Title
- WIRELESS PERSONAL COMMUNICATIONS
- Volume
- 85
- Number
- 3
- Start Page
- 1139
- End Page
- 1152
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/9869
- DOI
- 10.1007/s11277-015-2831-2
- ISSN
- 0929-6212
- Abstract
- In this paper, analog cancellation with a self-interference channel estimation scheme is proposed for full-duplex wireless systems. The aim of the proposed scheme is to cancel the self-interference signal at a full-duplex node for orthogonal frequency division multiplexing systems in a multipath self-interference channel with small delay spread. In the proposed scheme, the analog self-interference signal is emulated on the basis of baseband channel estimation. Assuming that a multipath self-interference channel has small delay spread, the proposed channel estimator provides effective channel gain and effective delay estimates of the self-interference channel on the basis of the maximum-likelihood criterion. Numerical results indicate that the self-interference suppression performance of the proposed analog cancellation scheme is better than the performance of the conventional schemes in a small delay spread multipath environment.
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