5G Field Experimental Trial on Frequency Domain Multiplexing of Mixed Numerology

Iwabuchi, Masashi; Benjebbour, Anass; Kishiyama, Yoshihisa; Wu, Dan; Tian, Tao; Li, Gu; Cui, Yang; Kashima, Tsuyoshi

doi:10.1109/vtcspring.2017.8108645

Cited by 12 publications

(6 citation statements)

References 5 publications

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“…Effects of guards analyzed in [14,[17][18][19]. Different filtering techniques are provided in [9,[14][15][16]. Moreover, windowing methods are discussed in [6,13,14].…”

Section: Ini Reduction Techniquesmentioning

confidence: 99%

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Flexible Multi-Numerology Systems for 5G New Radio

Yazar

Arslan

2018

JMM

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The physical layer of 5G cellular communications systems is designed to achieve better flexibility in an effort to support diverse services and user requirements. Orthogonal frequency division multiplexing (OFDM) waveform parameters are enriched with flexible multi-numerology structures. This paper gives a short summary for the Third Generation Partnership Project (3GPP) New Radio (NR) standard and then describes the differences of building blocks for Long Term Evolution (LTE) systems and NR from the flexibility perspective. Research opportunities for multi-numerology systems are presented in a structured manner. Finally, inter-numerology interference (INI) and signal-to-interference ratio (SIR) results as a function of multinumerology parameters, guard allocation and user power levels are obtained through computer simulations.

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“…Effects of guards analyzed in [14,[17][18][19]. Different filtering techniques are provided in [9,[14][15][16]. Moreover, windowing methods are discussed in [6,13,14].…”

Section: Ini Reduction Techniquesmentioning

confidence: 99%

“…Various inter-numerology interference (INI) estimation and cancellation methods are provided in [6,9,13]. Moreover, INI reduction techniques are proposed in [6,9,[13][14][15][16][17][18][19]. Algorithm examples for the advanced scheduling methods of multiple numerologies explained in [2,[20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Flexible Multi-Numerology Systems for 5G New Radio

Yazar

Arslan

2018

JMM

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“…As shown in Table 1, in order to reflect the flexible SB configuration of f‐OFDM, the SCSs of the two SBs should be set differently. Since 3GPP has approved the SCS allocation as

2^{n} \times 15

kHz, 27 two different SCSs 30 and 15 kHz are chosen in our study, which is also consistent with other works 18,26,28,29 . The timing offset between them is set as 64 samples, and the designed CCs are deployed on

{SB}_{1}

.…”

Section: Numerical Results and Analysismentioning

confidence: 72%

A novel out‐of‐band emission suppression method in future wireless communications employing filtered orthogonal frequency division multiplexing waveform

Chen

Wen

Hua

et al. 2022

Int J Communication

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Summary In order to achieve flexible configuration and asynchronous transmission of different subbands (SBs), SB filters are utilized in filtered orthogonal frequency division multiplexing (f‐OFDM) systems to isolate different SBs efficiently. Nevertheless, the price is the insertion of some intrinsic interference.Therefore, the suppression of the out‐of‐band emission (OOBE) between SBs is essential for the system performance improvement of f‐OFDM. According to the system structure of f‐OFDM, an optimization design model based on active interference cancelation (AIC) is proposed in this study, and the optimization design model is solved through second order cone programming. Furthermore, the effectiveness of the proposed AIC algorithm in OOBE suppression is verified by computer simulations. To the whole system, the OOBE suppression also means the decrease of inter‐SB interference (ITBI). In addition, the influences of main parameters, such as the number of the cancelation carriers (CCs), on the OOBE suppression performance of the proposed AIC algorithm, are simulated and analyzed. Moreover, some intrinsic characteristics of the proposed algorithm in parameter configuration are revealed in terms of power spectral density (PSD) and bit error ratio (BER).

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“…F-OFDM has the similar characteristic with OFDM, but it put slightly different. Unlike OFDM, F-OFDM system could employ different sub-carrier spacing [26], [27]. In mobile scenario, wider sub-carrier spacing is applied to weaken Doppler spread.…”

Section: Introductionmentioning

confidence: 99%

Interference Analysis and Filter Parameters Optimization for Uplink Asynchronous F-OFDM Systems

Yang

Chen

2019

IEEE Access

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Filtered-orthogonal frequency division multiplexing (F-OFDM) is a candidate for 5G new waveform, which has flexible numerologies to support various scenarios and can combat interference of multi-users effectively with filters. However, although longer filter length and higher roll-off factor can suppress out of band radiation, inter-symbol interference (ISI) and inter-carrier interference (ICI) will increase at the same time. Meanwhile, the wider guard band reduce inter-user interference (IUI) at the cost of higher spectrum occupancy. To meet target bit error rate (BER) requirements of all users and maximize the spectrum efficiency, a filter parameter and guard bandwidth optimization model was proposed to design related parameters dynamically for uplink asynchronous F-OFDM system, where users are allocated with different numerologies. We present a detailed theoretical derivation on ISI, ICI, and IUI for BER calculation, and the theoretical derivation of IUI in multi-user scenario with different subcarrier spacing between users is first presented. The formulated problem is proved to be a non-convex NP hard problem and Imperialist Competitive Algorithm (ICA) is applied for a desirable solution. The simulation results show that the theoretical derivations are valid and the proposed filter parameter and guard bandwidth optimization model can achieve higher spectrum efficiency than the fixed filter parameters in F-OFDM while outperforms traditional OFDM.INDEX TERMS Filtered-orthogonal frequency division multiplexing (F-OFDM), interference analysis, spectrum efficiency, multi-numerologies. MEIJIE YANG received the B.S. degree from the University of Science and Technology Beijing, China, in 2016, where she is currently pursuing the Ph.D. degree. Her research interests mostly include physical layer, advanced waveforms techniques, and signal processing for 5G systems. YUEYUN CHEN received the bachelor's degree from the South China University of Technology and the master's and Ph.D. degrees from Beijing Jiaotong University. She is currently a Professor with the School of Computer and Communication Engineering, University of Science and Technology Beijing, China. Her current research interests include wireless and mobile communications, including MIMO, communication signal processing, radio resource management, cognitive radio, cooperative communications, and optimization theory on communications. LIPING DU received the B.E. degree in industrial automation and the M.Sc. degree in physical sci-

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5G Field Experimental Trial on Frequency Domain Multiplexing of Mixed Numerology

Cited by 12 publications

References 5 publications

Flexible Multi-Numerology Systems for 5G New Radio

Flexible Multi-Numerology Systems for 5G New Radio

A novel out‐of‐band emission suppression method in future wireless communications employing filtered orthogonal frequency division multiplexing waveform

Interference Analysis and Filter Parameters Optimization for Uplink Asynchronous F-OFDM Systems

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