Performance Evaluation and Comparison of OTFS and OFDM Systems Compensating the High Doppler Frequency and Delay Time 


Vol. 45,  No. 1, pp. 13-19, Jan.  2020
10.7840/kics.2020.45.1.13


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  Abstract

The 5th generation(5G), which is the fifth generation in mobile communication, has increased a lot of requirements than the 4th generation(4G), which is the mobile communication of the previous generation. There are requirements such as user experienced speed, peak data rate, spectral efficiency, latency, mobility and connectivity. Among these requirements, Orthogonal Time Frequency Space(OTFS) system has been proposed as a waveform study to support mobility. Orthogonal Frequency Division Multiplexing(OFDM), which is used for 4G and 5G, is very vulnerable to the Doppler effect that occurs in a moving environment of a receiver. In order to deal with frequency shift due to Doppler effect in OFDM, a complex Doppler compensation algorithm is needed at the receiver, which leads to an increase in complexity. OTFS can use the Symplectic Finite Fourier Transform(SFFT) to process signals in the delay-Doppler domain to effectively handle frequency shifts caused by Doppler. In this paper, we evaluate the performance of OTFS in doubly selective channel and use the proposed receiver MP(Message Passing) detector for OTFS. Although 4QAM shows good performance, if the modulation level goes up to 16QAM, it still shows excellent performance, but the performance is significantly reduced compared to 4QAM.

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  Cite this article

[IEEE Style]

B. Park and H. Ryu, "Performance Evaluation and Comparison of OTFS and OFDM Systems Compensating the High Doppler Frequency and Delay Time," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 1, pp. 13-19, 2020. DOI: 10.7840/kics.2020.45.1.13.

[ACM Style]

Byounghak Park and Heung-Gyoon Ryu. 2020. Performance Evaluation and Comparison of OTFS and OFDM Systems Compensating the High Doppler Frequency and Delay Time. The Journal of Korean Institute of Communications and Information Sciences, 45, 1, (2020), 13-19. DOI: 10.7840/kics.2020.45.1.13.

[KICS Style]

Byounghak Park and Heung-Gyoon Ryu, "Performance Evaluation and Comparison of OTFS and OFDM Systems Compensating the High Doppler Frequency and Delay Time," The Journal of Korean Institute of Communications and Information Sciences, vol. 45, no. 1, pp. 13-19, 1. 2020. (https://doi.org/10.7840/kics.2020.45.1.13)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880