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A Low Complexity CFO Estimation Method for UFMC Systems

Hui ZHANG, Bin SHENG, Pengcheng ZHU

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Summary :

Universal filtered multicarrier (UFMC) systems offer a flexibility of filtering sub-bands with arbitrary bandwidth to suppress out-of-band (OoB) emission, while keeping the orthogonality between subcarriers in one sub-band. Oscillator discrepancies between the transmitter and receiver induce carrier frequency offset (CFO) in practical systems. In this paper, we propose a novel CFO estimation method for UFMC systems that has very low computational complexity and can then be used in practical systems. In order to fully exploit the coherence bandwidth of the channel, the training symbols are designed to have several identical segments in the frequency domain. As a result, the integral part of CFO can be estimated by simply determining the correlation between received signal and the training symbol. Simulation results show that the proposed method can achieve almost the same performance as an existing method and even a better performance in channels that have small decay parameter values. The proposed method can also be used in other multicarrier systems, such as orthogonal frequency division multiplexing (OFDM).

Publication
IEICE TRANSACTIONS on Communications Vol.E104-B No.2 pp.169-177
Publication Date
2021/02/01
Publicized
2020/08/21
Online ISSN
1745-1345
DOI
10.1587/transcom.2019EBP3214
Type of Manuscript
PAPER
Category
Wireless Communication Technologies

Authors

Hui ZHANG
  Southeast University
Bin SHENG
  Southeast University
Pengcheng ZHU
  Southeast University

Keyword