Design and Performance Tradeoffs of Alternative Multi-Carrier Waveforms for 5G

Bazzi, Jamal; Weitkemper, Petra; Kusume, Katsutoshi; Benjebbour, Anass; Kishiyama, Yoshihisa

doi:10.1109/glocomw.2015.7414010

Cited by 17 publications

(12 citation statements)

References 9 publications

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“…The filtering of each SB can be chosen differently to satisfy individual requirements by taking into account the tradeoff between time and frequency localization [4]. That is, the longer the filter impulse response is, the higher the achievable OOB suppression and the higher the robustness to asynchronous transmission result, but also the longer signal in the time domain becomes, which may introduce inter-symbol interference (ISI) and latency.…”

Section: Impact Of Filtering On Resource Gridmentioning

confidence: 99%

“…This could overcome drawbacks of OFDM and introduce more flexibility, while still allowing to exploit welldeveloped techniques for OFDM, e.g., [2], [3] 1 . For example, a well-localized filter in the frequency domain applied to OFDM can be utilized to significantly lower the out-of-band (OOB) radiation, and thus mitigates interference between users in asynchronous access [4]. In addition, the subcarrier (SC) spacing as well as the symbol and cyclic prefix (CP) durations can be flexibly adapted per user within one band to optimize each transmission to the corresponding channel conditions and requirements [2].…”

Section: Introductionmentioning

confidence: 99%

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On Regular Resource Grid for Filtered OFDM

et al. 2016

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Filtered OFDM (F-OFDM) can accommodate diverse service requirements by introducing additional filtering to OFDM and flexibly adapting the filter according to the service requirement. However, when block filtering is flexibly adapted per-subband, the regular resource grid could be violated. In this letter, we propose a solution to maintain the regular resource grid for F-OFDM. The proposed solution is two-fold: 1) it allocates guard bands inside the filter bandwidth which is kept independent of guard band; 2) it introduces timing advance according to the filter used. It is shown in practically relevant scenarios that the proposed solution, despite its simplicity, performs better than another more complex approach.

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Section: Impact Of Filtering On Resource Gridmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On Regular Resource Grid for Filtered OFDM

et al. 2016

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“…The frequency response of pulse shaping filters can be used in GFDM system which are shown in Table 1 [13,14], in which lin ( ) is a truncated linear function.…”

Section: Pulse Shaping Filtermentioning

confidence: 99%

“…Equation (14) is used systematically to describe the roll-off area defined by in frequency domain. And 4 ( ) = 4 (35 − 84 + 70 2 − 20 3 ) is a polynomial that maps the range (0, 1) onto itself.…”

Section: Pulse Shaping Filtermentioning

confidence: 99%

Influence of Pulse Shaping Filters on PAPR Performance of Underwater 5G Communication System Technique: GFDM

Babar

et al. 2017

Wireless Communications and Mobile Computing

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Generalized frequency division multiplexing (GFDM) is a new candidate technique for the fifth generation (5G) standard based on multibranch multicarrier filter bank. Unlike OFDM, it enables the frequency and time domain multiuser scheduling and can be implemented digitally. It is the generalization of traditional OFDM with several added advantages like the low PAPR (peak to average power ratio). In this paper, the influence of the pulse shaping filter on PAPR performance of the GFDM system is investigated and the comparison of PAPR in OFDM and GFDM is also demonstrated. The PAPR is restrained by selecting proper parameters and filters to make the underwater acoustic communication more efficient.

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“…Filtered OFDM can be seen as a compromise between no filtering as for pure CP-OFDM and subcarrier filtering as done for Filter-Bank Multicarrier [4], as the filtering is applied to a subband consisting of a group of subcarriers as shown in Fig. 3 [7]. The whole system bandwidth is separated into subbands of certain width, each subband is filtered separately and the sum of these filtered subbands is transmitted depending on the allocated frequency resources.…”

Section: B Filtered Ofdmmentioning

confidence: 99%

Transparent spectral confinement approach for 5G

Bazzi

Kusume

Weitkemper

et al. 2017

2017 European Conference on Networks and Communications (EuCNC)

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This paper proposes a transparent spectral confinement approach for OFDM to enable multiplexing of multiple services with diverse requirements in one system band. Besides mobile broadband services, new service types like machine type and ultra-reliable low latency communications foreseen for future 5G systems set new requirements for the chosen waveform to support asynchronous access and multiplexing different numerologies. That is not best handled by OFDM as it is. Thus, various spectral confinement techniques have been proposed in the literature, which, however, require specific processing at both the transmitter and receiver. This tight link would increase signaling overheads to agree on both sides to apply certain respective processing. The transparent approach proposed in this paper decouples the tight link and thus keeps the system simple and robust. We show by means of numerical evaluations that OFDM with spectral confinement techniques like windowing or filtering at the transmitter, but without respective receiver processing, outperforms the conventional OFDM.

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Design and Performance Tradeoffs of Alternative Multi-Carrier Waveforms for 5G

Cited by 17 publications

References 9 publications

On Regular Resource Grid for Filtered OFDM

On Regular Resource Grid for Filtered OFDM

Influence of Pulse Shaping Filters on PAPR Performance of Underwater 5G Communication System Technique: GFDM

Transparent spectral confinement approach for 5G

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