Reduced out-of-band radiation-based filter optimization for UFMC systems in 5G

Mukherjee, Mithun; Shu, Lei; Kumar, Vikas; Kumar, Prashant; Matam, Rakesh

doi:10.1109/iwcmc.2015.7289245

Cited by 71 publications

(33 citation statements)

References 11 publications

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“…UFMC는 기존의 OFDM의 부반송파를 서브밴드로 나눈 다음, 시간영역 필터링 기법을 사용하여 전송 신호의 OOB 전력을 저감시킨다 [11], [12] . 시간영역 필터링을 하게 되면 필터의 응답성분이 생기기 때문에 필터링 전에 기 존 CP-OFDM에서 CP에 해당 하는 부분에 ZP(Zero Padding)을 추가한 다음, 시간영역 필터링을 수행한다.…”

Section: -2 Ufmcunclassified

Comparison Analysis of Time and Frequency Resource of Candidate Waveforms for 5G Mobile Communications

An¹,

Ryu²

2016

The Journal of Korean Institute of Electromagnetic Engineering

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One of evaluation indicators of candidate waveforms for 5G mobile communication is spectral efficiency improvement by OOB(Out of Band) power reduction technique. In this paper, time-frequency resource allocation characteristic of UFMC(Universal Filtered MultiCarrier), FBMC(Filter Bank Multi-Carrier), and W-OFDM(Weighted Orthogonal Frequency Division Multiplexing) system is evaluated and analyzed. As simulation results, spectral efficiency characteristic of these systems have been improved according to time resource allocation. In this paper, we can confirm that each system has similar time-frequency efficiency characteristic when the number of transmission bit is same and four symbols are transmitted with the linear system condition. Also, we can conclude that FBMC system has the lowest time-frequency resource efficiency under the nonlinear condition.

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Section: -2 Ufmcunclassified

Comparison Analysis of Time and Frequency Resource of Candidate Waveforms for 5G Mobile Communications

An¹,

Ryu²

2016

The Journal of Korean Institute of Electromagnetic Engineering

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“…OFDM 시스템과의 차이점은 UFMC는 다수의 데이터를 그룹단 위로 나누어 각각의 서브밴드에 맵핑한 후 서브밴드별로 필터링을 한 뒤 전송한다 [8] . 수신기에서는 2N 크기의 DFT를 수행한 후, 각각의 서브밴드에 맵핑된 데이터를 수신한다 [9] . 이러한 UFMC는 OOB 전력을 효과적으로 저 감시킬 수 있다.…”

Section: -2 Ufmcunclassified

“…UFMC 기술은 다수의 부반송파를 나누어 서브밴드를 구성하고, 각 서브밴드별로 필터링을 수행하여 OOB 전 력을 저감시키는 기술이다 [8], [9] . FBMC 기술은 다수의 부 반송파를 각각 필터링하여 OOB 전력을 저감시키는 기술 이며, 가장 낮은 OOB 전력 특성을 가지고 있다 [10], [11] .…”

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Nonlinear Characteristics Evaluation of the FBMC and UFMC System for the 5G Mobile Communication

An¹,

Ryu²

2016

The Journal of Korean Institute of Electromagnetic Engineering

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Recently, novel candidate waveform techniques for spectral efficiency improvement was proposed in order to satisfy key performance indicators(KPIs) of 5th generation(5G) mobile communication. Multi-carrier based universal filtered multi-carrier(UFMC) and filter bank multi-carrier(FBMC) are very famous as 5G candidate waveform techniques. Also, weighted orthogonal frequency division multiplexing (W-OFDM) that has low-complexity is receiving the spotlight slowly. In this paper, firstly, we describe a basic OFDM system. And then, we also describe UFMC, FBMC, and W-OFDM system. Next, we evaluate and analyze spectrum and BER performance of these systems under the nonlinear high power amplifier(HPA) environment. As simulation results, spectrum characteristic and BER performance of UFMC, FBMC, and W-OFDM are similar to each other. Therefore, under the nonlinear HPA environment, W-OFDM system is more advantageous because W-OFDM system uses a simple time-domain windowing technique and has similar characteristics to the others.

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“…OFDM 변조의 경우, 높은 OOB(Out-of-Band) 전 력을 가지고 있어 각 어플리케이션 스펙트럼 사이에 넓 은 보호 대역을 요구하지만 [9] , 부반송파를 그룹 필터링 기법을 사용하는 UFMC나 개별 필터링하는 FBMC 변조 의 경우, OOB의 전력이 낮기 때문에 보다 좁은 보호대역 을 요구하며 [10]～ [13] , 따라서 행하고, 필터링된 신호들을 합쳐서 최종 전송을 위한 신 호를 생성한다 [10] . FBMC는 개별 부반송파를 필터링하기 위하여 IDFT 연산 후 PPN 구조를 이용, 지연(delay)과 합 (sum) 연산을 수행하여 최종 변조신호를 생성한다 [11] .…”

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Combination System Design of 5G Candidate Modulation and Full Duplex Communication for the Spectrum Efficiency Enhancement

Ryu²

2016

The Journal of Korean Institute of Electromagnetic Engineering

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In this paper, we propose and design a SSD(Simultaneous Single band Duplex) system using 5G(Generation) candidate modulations. Especially, we consider HPA(High Power Amplifier) nonlinearity in the proposed system. And then, we evaluate and analyze performance of the proposed system. As simulation results, performance of SSD-OFDM(Orthogonal Frequency Division Multiplexing), SSD-FMC (Universal Filtered Multi-Carrier), and SSD-FBMC(Filter Bank Multi-Carrier) is severely degraded by HPA nonlinearity. However, performance of SSD-OFDM, SSD-UFMC, and SSD-FBMC is similar in the same condition. That is, OFDM, UFMC, and FBMC have a similar PAPR(Peak to Average Power Ratio) characteristic. Finally, we can confirm that the proposed SSD system can not cancel(SI) self-interference effectively by strong HPA nonlinearity. That is, Reducing PAPR is important in order to avoid effect of HPA nonlinearity in the proposed SSD system.

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Reduced out-of-band radiation-based filter optimization for UFMC systems in 5G

Cited by 71 publications

References 11 publications

Comparison Analysis of Time and Frequency Resource of Candidate Waveforms for 5G Mobile Communications

Comparison Analysis of Time and Frequency Resource of Candidate Waveforms for 5G Mobile Communications

Nonlinear Characteristics Evaluation of the FBMC and UFMC System for the 5G Mobile Communication

Combination System Design of 5G Candidate Modulation and Full Duplex Communication for the Spectrum Efficiency Enhancement

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