SINR analysis of OFDM and f-OFDM for machine type communications

Hu, Kun Chen; Armada, Ana García

doi:10.1109/pimrc.2016.7794702

Cited by 20 publications

(18 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A lot of related work has been done for OFDM [38], [39], however, it is not enough for F-OFDM. Besides channel impulse responds, filter impulse responds should also be taken into consideration.…”

Section: A Desired Signal For Cp Insufficientmentioning

confidence: 99%

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

Yang

Chen

2019

IEEE Access

View full text Add to dashboard Cite

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-

show abstract

Section: A Desired Signal For Cp Insufficientmentioning

confidence: 99%

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

Yang

Chen

2019

IEEE Access

View full text Add to dashboard Cite

show abstract

“…Recently, many alternatives to OFDM technology were proposed for the 5G air interface. These include filtered OFDM (F-OFDM) [14], filtered bank multi-carrier (FBMC) [3], universal filtered multi-carrier (UFMC) [1], and generalized frequency division multiplexing (GFDM) [15]. For example, in the FBMC modulation format, each sub-carrier is individually filtered using a filter bank to provide low out-of-band (OOB) emission, which results in lower ICI.…”

Section: Introductionmentioning

confidence: 99%

PAPR Reduction in UFMC for 5G Cellular Systems

et al. 2020

View full text Add to dashboard Cite

Universal filtered multi-carrier (UFMC) is a potential multi-carrier system for future cellular networks. UFMC provides low latency, frequency offset robustness, and reduced out-of-band (OOB) emission that results in better spectral efficiency. However, UFMC suffers from the problem of high peak-to-average power ratio (PAPR), which might impact the function of high power amplifiers causing a nonlinear distortion. We propose a comparative probabilistic PAPR reduction technique, called the decomposed selective mapping approach, to alleviate PAPR in UFMC systems. The concept of this proposal depends on decomposing the complex symbol into real and imaginary parts, and then converting each part to a number of different phase vectors prior to the inverse fast Fourier transform (IFFT) operation. The IFFT copy, which introduces the lowest PAPR, is considered for transmission. Results obtained using theoretical analysis and simulations show that the proposed approach can significantly enhance the performance of the UFMC system in terms of PAPR reduction. Besides, it maintains the OOB emission with candidate bit error rate and error vector magnitude performances.

show abstract

“…3) With higher filter orders, a good performance can be achieved on the expense of computational cost. Therefore, the trade-off between the performance and complexity need to be optimized [10], [11].…”

Section: Introductionmentioning

confidence: 99%