New DFT-Spread Filter Bank Based Multi-Carrier Transmission 


Vol. 42,  No. 7, pp. 1297-1305, Jul.  2017
10.7840/kics.2017.42.7.1297


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  Abstract

In this paper, we investigate the problem that the PAPR reduction effect of the conventional DFT-spread FBMC is insignificant. By figuring out the reason and fixing it, we propose a modified DFT-spread FBMC with low PAPR. Due to the additional phase difference between the real part and the imaginary part by OQAM, a single carrier effect can not be obtained even if DFT spreading is pre-performed like the SC-FDMA scheme. In order to fix this problem, in the proposed scheme, the process of aligning phase between the real and the imaginary parts is added. Consequently, the proposed scheme generates a single carrier-like waveform in the overlapped interval of real and imaginary parts of the DFT spread symbol. In addition, in order to care about the non-overlapped intervals in which the single carrier effect is not obtained, the proposed scheme generates two transmission signal candidates by differently taking the overlapped interval and then, transmits the one with low PAPR. The proposed scheme requires significantly smaller side information than that of the conventional candidate selection-based PAPR reduction schemes, but it exhibits better PAPR performance. Also, the process of aligning the phase of the proposed scheme can be easily implemented by a proper sign inversion process, and the complexity for generating the second transmission signal candidate is minimal.

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  Cite this article

[IEEE Style]

D. Na and K. Choi, "New DFT-Spread Filter Bank Based Multi-Carrier Transmission," The Journal of Korean Institute of Communications and Information Sciences, vol. 42, no. 7, pp. 1297-1305, 2017. DOI: 10.7840/kics.2017.42.7.1297.

[ACM Style]

Donj-jun Na and Kwonhue Choi. 2017. New DFT-Spread Filter Bank Based Multi-Carrier Transmission. The Journal of Korean Institute of Communications and Information Sciences, 42, 7, (2017), 1297-1305. DOI: 10.7840/kics.2017.42.7.1297.

[KICS Style]

Donj-jun Na and Kwonhue Choi, "New DFT-Spread Filter Bank Based Multi-Carrier Transmission," The Journal of Korean Institute of Communications and Information Sciences, vol. 42, no. 7, pp. 1297-1305, 7. 2017. (https://doi.org/10.7840/kics.2017.42.7.1297)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880