Fast Iterative Semi-Blind Receiver for URLLC in Short-Frame Full-Duplex Systems with CFO

Liu, Y ORCID: 0000-0003-0437-7289, Zhu, X ORCID: 0000-0002-7371-4595, Lim, EG, Jiang, Y and Huang, Y ORCID: 0000-0001-7774-1024
(2019) Fast Iterative Semi-Blind Receiver for URLLC in Short-Frame Full-Duplex Systems with CFO. IEEE Journal on Selected Areas in Communications.

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IEEE We propose an iterative semi-blind (ISB) receiver structure to enable ultra-reliable low-latency communications (URLLC) in short-frame full-duplex (FD) systems with carrier frequency offset (CFO). To the best of our knowledge, this is the first work to propose an integral solution to channel estimation and CFO estimation for short-frame FD systems by utilizing a single pilot. By deriving an equivalent system model with CFO included implicitly, a subspace based blind channel estimation is proposed for the initial stage, followed by CFO estimation and channel ambiguities elimination. Then refinement of channel and CFO estimates is conducted iteratively. The integer and fractional parts of CFO in the full range are estimated as a whole and in closed-form at each iteration. The proposed ISB receiver significantly outperforms the previous methods in terms of frame error rate (FER), mean square errors (MSEs) of channel estimation and CFO estimation and output signal-tointerference- and-noise ratio (SINR), while at a halved spectral overhead. Cramér-Rao lower bounds (CRLBs) are derived to verify the effectiveness of the proposed ISB receiver structure. It also demonstrates high computational efficiency as well as fast convergence speed.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 12 Mar 2019 11:03
Last Modified: 31 Mar 2020 09:54
DOI: 10.1109/JSAC.2019.2898746