Software-defined Radios: Architecture, state-of-the-art, and challenges

Akeela, Rami; Dezfouli, Behnam

doi:10.1016/j.comcom.2018.07.012

Cited by 103 publications

(60 citation statements)

References 136 publications

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“…One of the objectives of our work is to maximize the total throughput in the microcell-femtocell network using dynamic cell selection and efficient bandwidth distribution mechanisms. The throughput is calculated using the well-known Shannon's formula given as (5).…”

Section: B Throughput Measurementmentioning

confidence: 99%

“…Combining the principles of Network Functions Virtualization (NFV) with Software Defined Network (SDN) benefits for programmability and flexibility to the fore [7]. The offloading of software defined radio processing to general processing is achieved through NFV to meet the flexibility of programming [5]. Special emphasis to the 4G cellular Long-Term Evolution network is given through the To achieve the performance objectives, Hybrid Automatic Repeat Request (HARQ) technique and different multiple input multiple output (MIMO) transmission methods are explain in [2], [15].…”

Section: Introductionmentioning

confidence: 99%

“…Another approach called software defined radios (SDR) offload the edge devices and the base stations (BSs) by performing the signal processing operations on general computing platforms instead of hardware platforms by using multiple antennas at transmitter and receiver improve communication performance and efficiency. This functionality is achieved through Network Function Virtualization (NFV) to enable the deployment of sophisticated central algorithms [5]. The data rate also improved in frequency domain by spatial multiplexing with MIMO, and larger channel bandwidths of up to 20MHz [6].…”

Section: Introductionmentioning

confidence: 99%

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Bandwidth Distribution Algorithm of Applications in LTE-Femtocell Network

Jadhav*,

Rao

2019

IJITEE

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The wireless communication has become the essential of today’s Internet of Things (IoT) and mobile applications which is increasing exponentially in near future. These applications demand high data rate to speed up the communication among IoT or internet applications. The data rate requirement of individual application is different. To fulfill these demands of every application Long Term Evolution (LTE) integrated with femtocell technology is identified as suitable wireless technology. The running applications on a user equipment changes dynamically. Hence in dense deployment of femtocell and IoT devices, the bandwidth distribution to many active applications becomes more complicated. For multiple running applications per device with available bandwidth constraint, optimal bandwidth allocation to applications has become the most challenging issue. We include the bandwidth allocation to applications during handover of user equipment in LTE-femtocell network. The handover procedure needs efficient cell selection criteria for target cell selection. Hence in our research we focus on bandwidth distribution among applications by proposing “Efficient Bandwidth Distribution” (EBD) mechanism and efficient cell selection by “Dynamic Cell Selection” (DCS) mechanisms to mitigate above mentioned issues.

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Section: B Throughput Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bandwidth Distribution Algorithm of Applications in LTE-Femtocell Network

Jadhav*,

Rao

2019

IJITEE

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“…Regarding base stations, the combination of General Purpose Processors (GPPs) and Graphics Processing Units (GPUs) yields high flexibility, but requires a high power consumption. Moreover, the performance loss related to GPP-GPU data transfers may be prohibitive in real-time applications [38]. In turn, FPGA's parallelism and programmability are very convenient for flexible and upgradeable base stations with better processing throughputs than digital signal processors and better power efficiency than GPP-and GPU-based solutions [39].…”

Section: Limitations and Scopementioning

confidence: 99%

An FPGA-Oriented Baseband Modulator Architecture for 4G/5G Communication Scenarios

Ferreira

2018

Electronics

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The next evolution in cellular communications will not only improve upon the performance of previous generations, but also represent an unparalleled expansion in the number of services and use cases. One of the foundations for this evolution is the design of highly flexible, versatile, and resource-/power-efficient hardware components. This paper proposes and evaluates an FPGA-oriented baseband processing architecture suitable for communication scenarios such as non-contiguous carrier aggregation, centralized Cloud Radio Access Network (C-RAN) processing, and 4G/5G waveform coexistence. Our system is upgradeable, resource-efficient, cost-effective, and provides support for three 5G waveform candidates. Exploring Dynamic Partial Reconfiguration (DPR), the proposed architecture expands the design space exploration beyond the available hardware resources on the Zynq xc7z020 through hardware virtualization. Additionally, Dynamic Frequency Scaling (DFS) allows for run-time adjustment of processing throughput and reduces power consumption up to 88%. The resource overhead for DPR and DFS is residual, and the reconfiguration latency is two orders of magnitude below the control plane latency requirements proposed for 5G communications.waveforms (FBMC, UFMC, GFDM) intermingled with a variety of 3G and 4G waveforms" [3]. In heavily used portions of the spectrum, such as the sub-6 GHz band, multi-waveform coexistence requires Dynamic Spectrum Access (DSA) and Carrier Aggregation (CA) techniques to achieve a more efficient spectrum utilization [1].Other important factors in 5G NR are cost minimization and energy efficiency. Cloud Radio Access Networks (C-RANs) attempt to achieve a more efficient energy consumption and resource allocation by deploying a central Baseband processing Unit (BBU) that serves multiple Remote Radio Heads (RRHs) [4]. This network architecture relies on reconfigurable hardware modules to implement BBUs supporting the different access technologies and modes of operation used by RRHs.The realization of the 5G vision will strongly rely on the design of hardware infrastructure adjusted to the challenges imposed by future wireless communications. Regarding digital baseband processing, hardware designs should be: (1)flexible to support multiple services requirements, waveforms, and numerologies; (2) evolvable/forward-compatible to be easily upgradeable with new functionalities and future modes of operation, thus extending the system's duty lifetime; (3) energy-efficient and (4) cost-effective. FPGAs are convenient platforms to design systems with these characteristics. Apart from their capacity for parallel intensive computation, FPGAs feature a high degree of flexibility not only at design time, but also at runtime, through Dynamic Partial Reconfiguration (DPR) [5]: the ability to reconfigure portions of FPGA logic fabric (reconfigurable regions) while the other portions remain unchanged and running. This increases the FPGA functional density, as mutually-exclusive circuits/functionalities are implemented o...

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“…Для классификации и своевременного обнаружения геоэффективных событий требуется глобальная сеть спектрополяриметров, сочетающих в себе такие качества, как гибкость конфигурации в зависимости от помеховой обстановки, невысокая стоимость, простота установки (развертывания) и обслуживания систем спектрополяриметра. На наш взгляд, всем этим требованиям отвечают системы обработки сигналов, построенные на базе SDR-решений [Akeela, Dezfouli, 2018]. Программно-конфигурируемые технологии позволяют перенести большую часть приемного устройства в цифровую областьтаким образом, радиочастотные параметры приемного устройства определяются программным путем.…”

Section: Introductionunclassified

Solar Spectropolarimeter for Space Weather Forecast

Ivanov

Gubin

Lesovoi

et al. 2019

Solnechno-Zemnaya Fizika

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We propose a project of the meter wavelength range solar spectropolarimeter designed for a ground-based network developing for space weather forecast. The Software-Defined Radio (SDR) solution is chosen to meet such instrument network requirements as specification identity, low cost, possibility of controlling and transmitting data remotely via the Internet. Along with these requirements, the proposed SDR solution allows us to measure Stokes I and V easily, which contrasts the proposed instrument with e-CALLISTO network spectropolarimeters, most of which can record only one linear polarization. Deployment of such instruments at various longitudes will allow continuous observation of type II bursts, often related to coronal mass ejections (CMEs) — the most geoeffective solar activity events that affect the space weather significantly.

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Software-defined Radios: Architecture, state-of-the-art, and challenges

Cited by 103 publications

References 136 publications

Bandwidth Distribution Algorithm of Applications in LTE-Femtocell Network

Bandwidth Distribution Algorithm of Applications in LTE-Femtocell Network

An FPGA-Oriented Baseband Modulator Architecture for 4G/5G Communication Scenarios

Solar Spectropolarimeter for Space Weather Forecast

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