Multiplierless Filtered-OFDM Transmitter for Narrowband IoT Devices

Loulou, AlaaEddin; Yli‐Kaakinen, Juha; Levanen, Toni; Lehtinen, Vesa; Schaich, Frank; Wild, Thorsten; Renfors, Markku; Valkama, Mikko

doi:10.1109/jiot.2019.2945186

Cited by 17 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…引起信道特性变化的外界因素主要可分为两类: 信道中的水分子和其他悬浮粒子对信号光束的衰减效应, 以及海洋湍流引起的信号光束波前相位的随机起伏变化. 其中, 衰减效应包括吸收效应 (通信光束的能量被转换成另 [78,79] . 然而, 相干解调方式对信号光和本振光的相干性要求严格.…”

Section: 水下信道建模技术unclassified

涉水光学

Li¹

2024

Sci. Sin.-Inf.

View full text Add to dashboard Cite

1) 含海洋光学, 水下光学.2) Vicinage earth, Vicinagearth. Vicinage 源于古法语/拉丁语的 visnage/vicinus('neighbor').IOP) 和表观光学特性 (apparent optical properties, AOP). 固有光学特性水体固有光学特性是自然水体本身的光学参数, 独立于环境光场. 常用的水体固有光学参量包括光谱吸收系数 (spectral absorption coefficient), 光谱散射系数 (spectral scattering coefficient), 光谱衰减系数 (spectral attenuation coefficient), 体散射函数 (volume scattering function), 后向散射系数 (backscatter coefficient), 前向散射系数 (forescatter coefficient), 光束衰减系数 (beam attenuation coefficient) 等.

show abstract

Section: 水下信道建模技术unclassified

涉水光学

Li¹

2024

Sci. Sin.-Inf.

View full text Add to dashboard Cite

show abstract

“…In their study, they have derived expressions for sub-interferences and its variance and validated result through simulations. In Loulou et al (2020) for a spectrally efficient narrowband OFDM transmitter, a low complexity solution based on the use of lookup tables have been proposed. It is mostly suitable for narrowband low power IoT and massive machine type systems that require only memory units with reduced hardware.…”

Section: Literature Reviewmentioning

confidence: 99%

Investigations on Filtered OFDM with Selective Mapping Method and Partial Transmit Sequence Technique for Future Generation Mobile Communication Systems

Yadav

2023

ejtas

View full text Add to dashboard Cite

Future generation mobile communication system requires asynchronous transmission of data, reduced out-of-band power emission, low peak-to-average power ratio, low latency, high data transmission rate, better spectrum, energy, and power efficiency, etc. Investigations on suitable waveform candidates for future-generation mobile communication have been reported in this paper. Filtered Orthogonal Frequency Division Multiplexing (F- OFDM), F- OFDM with Selective Mapping Method (SLM), and F- OFDM with Partial Transmit Sequence (PTS) technique, have been investigated. Its performances have been evaluated in terms of peak-to-average power ratio (PAPR), bit error rate (BER), and out-of-band power emissions. F–OFDM is a suitable candidate for future-generation mobile communication systems that can be used with single-rate or multirate filters. It can also be used in combination with other PAPR reduction techniques. F-OFDM with PTS technique requires a smaller number of IFFT operations than F-OFDM with SLM. The result obtained from my present investigations reveals that F-OFDM with the PTS technique has 4.3 dB less PAPR than that of OFDM at the cost of marginal increase in the BER value.

show abstract

“…• OFDM based IoT: [33] utilized frequency diversity to reduce the BER of OFDM based IoT system under the spectral efficiency constraint. [36] proposed a low complexity scheme of narrowband OFDM transmitter for IoT nodes based on lookup tables. [37] investigated sparse index OFDM modulation based IoT networks, and proposed an energy efficient scheme to reduce PARA.…”

Section: Related Workmentioning

confidence: 99%

“…Enhanced system performance can be achieved by optimizing subcarrier and power allocation in OFDM based networks [34]- [35]. Motivated by the above advantages, there have been several studies on OFDM based IoT networks [33], [36].…”

Section: Introductionmentioning

confidence: 99%

Trajectory and Resource Optimization in OFDM-Based UAV-Powered IoT Network

Gao

et al. 2021

IEEE Trans. on Green Commun. Netw.

View full text Add to dashboard Cite

The Internet of Things (IoT) is playing an increasingly vital role in multiple industries and our everyday life. A pressing practical problem of IoT devices (IoT-Ds) is their explosive growth of connectivity which leads to large energy consumption. One of the most promising solutions to achieve a sustainable green IoT network is unmanned aerial vehicle (UAV) enabled wireless power transfer (WPT) due to its flexibility, mobility and cost advantage. In this paper, we propose an UAVpowered IoT network based on Orthogonal Frequency Division Multiplexing (OFDM). In the proposed network, two ground nodes (GNs) are powered by two UAVs through down link WPT. In the uplink, the data collected by GNs are transmitted to the corresponding UAVs with the harvested energy by utilizing orthogonal subcarriers, which can effectively avoid the interference. UAVs' trajectories and resource allocation are optimized to maximize the sum average transmission rate of two GNs while ensuring the minimum average transmission rate of each GN. In this paper, we utilize successive convex programming (SCP) technique to solve the proposed optimization problem. Simulation results show that our proposed scheme achieves larger sum average transmission rate than the benchmark schemes.

show abstract

Multiplierless Filtered-OFDM Transmitter for Narrowband IoT Devices

Cited by 17 publications

References 18 publications

涉水光学

涉水光学

Investigations on Filtered OFDM with Selective Mapping Method and Partial Transmit Sequence Technique for Future Generation Mobile Communication Systems

Trajectory and Resource Optimization in OFDM-Based UAV-Powered IoT Network

Contact Info

Product

Resources

About