Combined Subband-Subcarrier Spectral Shaping in Multi-Carrier Modulation Under the Excess Frame Length Constraint

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This paper investigates spectral shaping of multi-carrier-modulation waveforms based on combination of Nyquist windowing and subband filtering. The combined windowing/filtering allows simultaneous control on both subcarrier and subband spectra. When compared with the existing Nyquist windowing or subband filtering techniques under a fixed excess frame length constraint, the proposed scheme offers reduced sensitivity to carrier frequency and symbol timing offsets. Establishing an analytical tool based on the error spectrum stack consisting of the error signals evaluated at different signal delay positions, we explore the window-filter trade-off and provide the minimum interference power solution for given ranges of carrier frequency and symbol timing offsets. Our design targets low-latency applications having no provisions for high-precision synchronization and having potential need for spectrum aggregation.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2017-06
Language
English
Article Type
Article
Keywords

OFDM SYSTEMS; FREQUENCY OFFSET; PULSE

Citation

IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, v.35, no.6, pp.1339 - 1352

ISSN
0733-8716
DOI
10.1109/JSAC.2017.2687378
URI
http://hdl.handle.net/10203/224712
Appears in Collection
EE-Journal Papers(저널논문)
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