This paper proposes a channel estimation scheme for the filter-bank multicarrier systems with quadrature amplitude modulation (FBMC-QAM). Under frequency selective channels, the adjacent data symbols cause interference to the pilot symbols in FBMC-QAM systems and degrade the performance of the channel estimation. To handle this problem, we analyze the interference of the pilot symbols in an oversampled frequency domain before the receiver filtering process. Exploiting the interference analysis, we propose a pilot symbol configuration and condition of filter coefficients to cancel the inter-carrier interference. Moreover, we apply a time domain data symbol precoding to eliminate inter-symbol interference. The simulation results show that the proposed scheme outperforms conventional channel estimation schemes.
Bibliographical noteFunding Information:
Manuscript received April 30, 2018; revised September 7, 2018 and October 30, 2018; accepted November 30, 2018. Date of publication December 5, 2018; date of current version January 15, 2019. This work was supported by the Institute for Information and Communications Technology Promotion Grant funded by the Korea government (MSIT) (2016-0-00181, Development on the core technologies of transmission, modulation, and coding with low-power and low complexity for massive connectivity in the IoT environment). The review of this paper was coordinated by Dr. X. Wang. (Corresponding author: Chungyong Lee.) The authors are with the Department of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, South Korea (e-mail:, taehyun_lee@ yonsei.ac.kr; email@example.com; firstname.lastname@example.org; cylee@ yonsei.ac.kr).
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All Science Journal Classification (ASJC) codes
- Automotive Engineering
- Aerospace Engineering
- Electrical and Electronic Engineering
- Applied Mathematics