Spectral encapsulation of OFDM systems based on orthogonalization for short packet transmission

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A spectrally encapsulated (SE) orthogonal frequency-division multiplexing (OFDM) precoding scheme for wireless short packet transmission, which can suppress the out-of-band emission (OoBE) while maintaining the advantage of the cyclic prefix (CP)-OFDM, is proposed. The SE-OFDM symbol consists of a prefix, an inverse fast Fourier transform (IFFT) symbol, and a suffix generated by the head, center, and tail matrices, respectively. The prefix and suffix play the roles of a guard interval and suppress the OoBE, and the IFFT symbol has the same size as the discrete Fourier transform symbol in the CP-OFDM symbol and serves as an information field. Specifically, as the center matrix generating the IFFT symbol is orthogonal, data and pilot symbols can be allocated to any subcarrier without distinction. Even if the proposed precoder is required to generate OFDM symbols with spectral efficiency in the transmitter, a corresponding decoder is not required in the receiver. The proposed scheme is compared with CP-OFDM in terms of spectrum, OoBE, and bit-error rate.
Publisher
WILEY
Issue Date
2020-12
Language
English
Article Type
Article
Citation

ETRI JOURNAL, v.42, no.6, pp.859 - 871

ISSN
1225-6463
DOI
10.4218/etrij.2019-0307
URI
http://hdl.handle.net/10203/279529
Appears in Collection
MA-Journal Papers(저널논문)
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