In this paper, we derive the closed forms of residual interference that occurs over a multipath channel of a filter bank multicarrier-quadrature amplitude modulation (FBMC-QAM) system, in which the system adopts two different prototype filters to guarantee that the orthogonality condition is met for both even and odd subcarriers without using a guard interval. The filter coefficients of the two filters are designed differently to meet the orthogonality condition, and thus, their degrees of robustness are different over the multipath channel. In order to clarify the influence of the multipath channel on the performance of the FBMC-QAM, we both derive an effective channel frequency response that includes the filter response and analyze the residual interference over the multipath channel. Based on this analysis, we propose a unique scheme for both even-biased reference symbol mapping and symbol/signal-level channel estimation and equalization that is suitable for the FBMC-QAM system transceiver structure. The simulation results show that the performance of the proposed scheme is comparable to that of a conventional orthogonal frequency division multiplexing-quadrature amplitude modulation system in terms of the mean squared error, bit error rate, and effective data rate.
Bibliographical noteFunding Information:
Manuscript received December 1, 2016; revised March 27, 2017 and May 26, 2017; accepted May 26, 2017. Date of publication May 31, 2017; date of current version August 14, 2017. This work was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education under Grant NRF-2013R1A1A2A10011764. The associate editor coordinating the review of this paper and approving it for publication was R. Dinis. (Corresponding author: Sanghoon Lee.) The authors are with the Department of Electrical and Electronics Engineering, Yonsei University, Seoul 120-749, South Korea (e-mail: firstname.lastname@example.org; email@example.com; firstname.lastname@example.org).
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering