Crest Factor Reduction of Inter-Band Multi-Standard Carrier Aggregated Signals

Fehri, Bilel; Boumaiza, Slim; Sich, Edward

doi:10.1109/tmtt.2014.2365788

Cited by 21 publications

(8 citation statements)

References 20 publications

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“…The smaller EVM value means the better actual signal quality, i. e., the smaller signal distortion caused by the PAPR reduction algorithm. [20,27,28,29] are designed for the application scenario of dual-band amplifiers. Compared with the dual-band one-dimensional PAPR reduction method, the traditional 2-D PAPR reduction method considers the signal amplitude of the upper and the lower bands simultaneously, mainly in the peak detection module.…”

Section: Definition and Characteristics Of Signal Paprmentioning

confidence: 99%

A two-dimensional peak-to-average power ratio reduction method based on iterative noise filtering for dual-band power amplifiers

Fan

Zhu

et al. 2022

IEICE Electron. Express

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Section: Definition and Characteristics Of Signal Paprmentioning

confidence: 99%

A two-dimensional peak-to-average power ratio reduction method based on iterative noise filtering for dual-band power amplifiers

Fan

Zhu

et al. 2022

IEICE Electron. Express

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“…Although the convex relaxation approach reduces the implementation complexity quite significantly, e.g., 10 times reduction for 12 carriers to 4 MCPAs case, the practical deployment of this algorithm is still challenging. 16 To address this issue, we also introduce the deep learning based solution, which preserves 80% power saving gain on average as shown above and only requires a marginal overhead for different scenarios.…”

Section: Complexity Analysismentioning

confidence: 99%

“…Typical examples include the high efficiency Doherty power amplifier (PA) [14] and film bulk acoustic resonator filters [15]. Multi-carrier power amplifier (MCPA) [16]- [18], i.e., to support multiple carriers within a single PA unit, has been proposed as a promising technology to improve the hardware efficiency for multi-stream communication scenarios, and the corresponding advantages using MCPA technology are obvious. First, by integrating multiple carriers together, the total transmit power becomes greater, which enables MCPAs to operate at higher efficiency areas.…”

mentioning

confidence: 99%

Dynamic Carrier to MCPA Allocation for Energy Efficient Communication: Convex Relaxation Versus Deep Learning

Zhang

Xiang

Cao

et al. 2019

IEEE Trans. on Green Commun. Netw.

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The rapid increasing demand of wireless transmission has caused mobile broadband to continuously evolve through multiple frequency bands, massive antennas, and other multi-stream processing schemes. Together with the improved data transmission rate, the power consumption for multi-carrier transmission and processing is proportionally increasing, which contradicts with the energy efficiency requirements of 5G wireless systems. To meet this challenge, multi-carrier power amplifier (MCPA) technology, e.g., to support multiple carriers through a single power amplifier, is widely deployed in practice. With so many carriers required for 5G communication and limited number of carriers supported per MCPA, a key question to ask is how to allocate those carriers into multiple MCPAs and whether we shall dynamically adjust this allocation strategy. In this paper, we have theoretically formulated the dynamic carrier to MCPA allocation problem to jointly optimize the traditional separated baseband and radio frequency processing. On top of that, we have proposed both convex relaxation and deep learning-based algorithms. From our simulation results, the proposed algorithms achieve most of the power saving gain compared with the optimal exhaustive search-based algorithm. Furthermore, the deep learning-based approach can greatly reduce computational time, which is of vital importance in the practical deployment.

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“…The 2D-CFR method jointly clips the dual-band signals with the same proportion, which corrects the defects of 1D-CFR that fails to consider the combining effect of a dual-band system and significantly improves the performance of the CFR method on dual-band signals. The 2 component carriers-CFR (2CC-CFR) technology in [22] extends its application scope to the scenarios of unequal power levels, and considers different requirements on error vector magnitude (EVM) and arbitrary number of carriers. The two-dimensional modified CFR (2D-MCFR) proposed in [24] uses the difference of signal instantaneous amplitude between the two bands to determine the reduction amount of the two bands.…”

Section: Introductionmentioning

confidence: 99%

Novel Sector Two-Dimensional Crest Factor Reduction Techniques for Performance Improvement in Dual-Band System

et al. 2020

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Currently, peak-to-average power ratio (PAPR) degrades the performance of the wireless system and has been widely studied in the orthogonal frequency division multiplexing (OFDM) systems. However, there is less work concerning about this issue in the dual-band signal wireless communication system, which still hinders the wide applications of the system. This paper aims to develop a new twodimensional sector crest factor reduction (2D-SCFR) method to solve this problem in the dual-band signal system by reducing a certain amount of dual-band signal amplitude. In practice, we formulate a combined PAPR of the dual-band signals with the independent Gaussian distribution to evaluate the PAPR value of the dual-band signals. Further, as to the peak detection process, this proposed method introduces a continuous piecewise function, which determines the reduction amount based on signal amplitude to avoid over-reduction. To evaluate the performance of the proposed clipping technique, crest factor reduction (CFR) algorithms are applied as the benchmark solution with different dual-band input signal combinations. The numerical results show that the proposed method significantly improves the signal quality of error vector magnitude (EVM), as compared to other CFR algorithms.

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Crest Factor Reduction of Inter-Band Multi-Standard Carrier Aggregated Signals

Cited by 21 publications

References 20 publications

A two-dimensional peak-to-average power ratio reduction method based on iterative noise filtering for dual-band power amplifiers

A two-dimensional peak-to-average power ratio reduction method based on iterative noise filtering for dual-band power amplifiers

Dynamic Carrier to MCPA Allocation for Energy Efficient Communication: Convex Relaxation Versus Deep Learning

Novel Sector Two-Dimensional Crest Factor Reduction Techniques for Performance Improvement in Dual-Band System

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