FBMC System: An Insight into Doubly Dispersive Channel Impact

Zhang, Lei; Xiao, Pei; Zafar, Adnan; Quddus, Atta Ul; Tafazolli, Rahim

doi:10.1109/tvt.2016.2602096

Cited by 86 publications

(62 citation statements)

References 24 publications

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“…However, due to the subcarrier bandwidth and symbol duration near to transmission channel's coherence bandwidth and time, respectively, we consider the one-tap FDE as a suitable equalization method for FBMC-OQAM in this case. An indepth analysis about the doubly dispersive channels' impact on FBMC systems is given in [28].…”

Section: Robustness Against Multipath Channelsmentioning

confidence: 99%

Evaluation of 5G Modulation Candidates WCP-COQAM, GFDM-OQAM, and FBMC-OQAM in Low-Band Highly Dispersive Wireless Channels

Lizeaga

Rodríguez

Val

et al. 2017

Journal of Computer Networks and Communications

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We analyse some of the candidates for modulations for 5G: FBMC-OQAM, GFDM-OQAM, and WCP-COQAM. Unlike most of the related bibliographies, which are oriented to mobile communications, our research is focused on 5G in cognitive radio based industrial wireless communications. According to the ultrareliability and low-latency requirements of industrial communications, we simulate the aforementioned modulations in low-band transmissions (carrier frequencies below 6 GHz and a bandwidth narrower than 100 MHz) through large indoor spaces and severe multipath channels that emulate industrial halls. Moreover, we give detailed information about WCP-COQAM and how the windowing affects the protection against multipath effect and reduces spectral efficiency compared to GFDM-OQAM. We also compare the aforementioned filtered multicarrier techniques and OFDM in terms of robustness against multipath channels, power spectral density, and spectral efficiency. Based on these results, we aim at providing an approximate idea about the suitability of 5G MCM candidates for industrial wireless communications based on CR.

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Section: Robustness Against Multipath Channelsmentioning

confidence: 99%

Evaluation of 5G Modulation Candidates WCP-COQAM, GFDM-OQAM, and FBMC-OQAM in Low-Band Highly Dispersive Wireless Channels

Lizeaga

Rodríguez

Val

et al. 2017

Journal of Computer Networks and Communications

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“…Filter bank multicarrier with offset quadrature amplitude modulation (FBMC/OQAM) is one of the promising candidates which provide very low out of band radiation (OoBR), as well as immunity against synchronization errors, thanks to its per-subcarrier filtering [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Square-Root Nyquist Filter Design for QAM-Based Filter Bank Multicarrier Systems

Taheri

Ghoraishi²,

Xiao

et al. 2018

IEEE Trans. Veh. Technol.

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Abstract-Filter bank multicarrier systems with quadrature amplitude modulation (FBMC/QAM) have drawn attentions to get the advantage of complex symbol transmission, as well as very low out of band radiation and relaxed synchronization requirements for asynchronous scenarios. In order to make this system viable for practical deployment, the biggest challenge is designing appropriate filters to minimize the interference between adjacent subcarriers, while maintaining the Nyquist property of the filter. We show that the deviation from the Nyquist property can be compensated through the fractional shift of the filtered symbols, which provides flexibility to optimize the stopband of the filter. The proposed design method shows advantages over the state of the art designs, and provides guidance for the filter design in practical FBMC/QAM systems.

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“…In addition to waveforms such as orthogonal frequency division multiplexing (OFDM) [1], [2], universal filtered multicarrier (UFMC) [3], [4], filtered OFDM [5], filter bank multicarrier (FBMC) [6], [7], [8], the discrete cosine transform (DCT) based multicarrier modulation (MCM) adopts cosinusoidal orthogonal functions cos(2π×kt/(2T )) instead of complex exponential functions set exp(j × 2π × kt/T ) to achieve minimum subcarrier spacing at 1/(2T ) Hz [9], where k is the sub-channel index and T is the symbol duration respectively. Correspondingly, the multiplexing and de-multiplexing of subcarriers can be simply implemented by inverse discrete cosine transform (IDCT) and DCT, instead of inverse discrete Fourier transform (IDFT) and DFT.…”

Section: Introductionmentioning

confidence: 99%

Output SNR analysis and detection criteria for optimum DCT-based multicarrier system

Zhang

Mao

et al. 2016

2016 International Symposium on Wireless Communication Systems (ISWCS)

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Abstract-The discrete cosine transform (DCT) based multicarrier system is regarded as one of the complementary multicarrier transmission techniques for 5th Generation (5G) applications in near future. By employing cosine basis as orthogonal functions for multiplexing each real-valued symbol with symbol period of T , it is able to reduce the minimum orthogonal frequency spacing to 1/(2T ) Hz, which is only half of that compared to discrete Fourier transform (DFT) based multicarrier systems. Critical to the optimal DCT-based system design that achieves interference-free single-tap equalization, not only both prefix and suffix are needed as symmetric extension of information block, but also a so-called front-end pre-filter is necessarily introduced at the receiver side. Since the pre-filtering process is essentially a time reversed convolution for continuous inputs, the output signal-to-noise ratio (SNR) for each subcarrier after filtering is enhanced. In this paper, the impact of pre-filtering on the system performance is analyzed in terms of ergodic output SNR per subcarrier. This is followed by reformulated detection criterion where such filtering process is taken into consideration. Numerical results show that under modified detection criteria, the proposed detection algorithms improve the overall bit error rate (BER) performance effectively.

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FBMC System: An Insight into Doubly Dispersive Channel Impact

Cited by 86 publications

References 24 publications

Evaluation of 5G Modulation Candidates WCP-COQAM, GFDM-OQAM, and FBMC-OQAM in Low-Band Highly Dispersive Wireless Channels

Evaluation of 5G Modulation Candidates WCP-COQAM, GFDM-OQAM, and FBMC-OQAM in Low-Band Highly Dispersive Wireless Channels

Square-Root Nyquist Filter Design for QAM-Based Filter Bank Multicarrier Systems

Output SNR analysis and detection criteria for optimum DCT-based multicarrier system

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