Digital Compensation for Transmitter Leakage in Non-Contiguous Carrier Aggregation Applications With FPGA Implementation

Yu, Chao; Cao, Wenhui; Guo, Yan; Zhu, Anding

doi:10.1109/tmtt.2015.2495144

Cited by 17 publications

(9 citation statements)

References 22 publications

(28 reference statements)

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“…This has been recognized also in 3GPP recently, in the context of intraband noncontiguous carrier aggregation [2], [4]- [6]. Moreover, even in interband carrier aggregation scenarios in FDD devices, some of the spurious components can be hitting the own RX band causing own receiver desensitization [11]. Second, by concentrating the linearization efforts to the most critical spurious emissions only, the processing and instrumentation requirements can be significantly relaxed, thus potentially facilitating the DPD processing also in mobile terminals and other lower-cost devices.…”

Section: Introductionmentioning

confidence: 95%

“…Similar to the above IM3+ sub-band developments, we next extract the IMD terms at the higherorder IM sub-bands. The baseband equivalent IMD terms at the IM5+, IM7+, IM9+, and IM11+ sub-bands, as concrete examples, can be extracted using (1) and (2), interpreted at proper sub-bands, yielding yIM5 + (n) = P p=5 p odd f5+,p,n u5+,p(n) (11) yIM7 + (n) = P p=7 p odd f7+,p,n u7+,p(n)…”

Section: Generalization To Higher-order Im Sub-bandsmentioning

confidence: 99%

“…It has been recently demonstrated that in the context of LTE-Advanced mobile transmitter with noncontiguous CA or multicluster type transmission, the PA nonlinearities lead to spurious emissions that can seriously violate the given spectrum and spurious emission limits if not properly controlled [2], [4]- [6]. Furthermore, in FDD devices, in addition to violating the general spurious emission limits, the generated spurious components can also overlap with the device's own receive band, causing own receiver desensitization [4], [9], [11], [12]. One obvious solution to decrease the levels of unwanted emissions is to back off the transmit power from arXiv:1607.02249v2 [cs.IT] 19 Aug 2016 its saturation region.…”

mentioning

confidence: 99%

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Low-Complexity Subband Digital Predistortion for Spurious Emission Suppression in Noncontiguous Spectrum Access

Abdelaziz¹,

Anttila²,

Tarver³

et al. 2016

IEEE Trans. Microwave Theory Techn.

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Abstract-Noncontiguous transmission schemes combined with high power-efficiency requirements pose big challenges for radio transmitter and power amplifier (PA) design and implementation. Due to the nonlinear nature of the PA, severe unwanted emissions can occur, which can potentially interfere with neighboring channel signals or even desensitize the own receiver in frequency division duplexing (FDD) transceivers. In this article, to suppress such unwanted emissions, a low-complexity sub-band DPD solution, specifically tailored for spectrally noncontiguous transmission schemes in low-cost devices, is proposed. The proposed technique aims at mitigating only the selected spurious intermodulation distortion components at the PA output, hence allowing for substantially reduced processing complexity compared to classical linearization solutions. Furthermore, novel decorrelation based parameter learning solutions are also proposed and formulated, which offer reduced computing complexity in parameter estimation as well as the ability to track timevarying features adaptively. Comprehensive simulation and RF measurement results are provided, using a commercial LTEAdvanced mobile PA, to evaluate and validate the effectiveness of the proposed solution in real world scenarios. The obtained results demonstrate that highly efficient spurious component suppression can be obtained using the proposed solutions.

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Section: Introductionmentioning

confidence: 95%

Section: Generalization To Higher-order Im Sub-bandsmentioning

confidence: 99%

mentioning

confidence: 99%

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Low-Complexity Subband Digital Predistortion for Spurious Emission Suppression in Noncontiguous Spectrum Access

Abdelaziz¹,

Anttila²,

Tarver³

et al. 2016

IEEE Trans. Microwave Theory Techn.

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“…Foremost, analog mitigation techniques like fully-differential symmetrical structures or on-chip isolation techniques are used. But, as the results are often insufficient in terms of performance for the large number band combinations and scenarios, further adaptive digital signal processing is used to compensate for those coupling effects [13,35].…”

Section: Simplified Lte-advanced Transceiver Architecturementioning

confidence: 99%

From microwatt to gigabit: challenges of modern radio design

Pretl¹,

Faseth²,

Schumacher³

et al. 2018

Elektrotech. Inftech.

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On the brink of introducing the fifth generation (5G) of cellular networks, the art of radio-frequency (RF) integrated circuit design has never seen such a wide spread of diverging requirements:On the one hand, ubiquitous sensor networks are mandating power budgets in the order of micro-watt. They should be constructed as energy-autonomous, wireless, low-cost sensor nodes. This demand is caused by massive deployment scenarios of billions of devices, which makes wires and batteries unpractical. As a result, the desire for the radio nodes to harvest their operational energy from the environment emerges.On the other hand, the recent and ongoing realization of gigabit-per-second capable cellular modems is driving hardware and power requirements to extremes. To overcome hardware limitations, introduced by analog impairments, digital correction and alignment algorithms are employed for compensation. These factors call for usage of expensive advanced CMOS technology nodes and increased utilization of digital signal processing techniques.In this paper, we recap ongoing trends and developments for ultra-low power and high-end transceiver (TRX) designs using CMOS technology nodes ranging from low-cost to highest performance.Keywords: RF; ultra-low-power; wireless architectures; transceiver; mixed-signal circuits; 5G Von Mikrowatt zu Gigabit: Herausforderungen beim Design moderner Funkübertragungssysteme. Neben der Einführung der zellularen Mobilfunknetze der fünften Generation (5G) muss sich auch die integrierte HochfrequenzSchaltungstechnik einer noch nie dagewesenen Breite an unterschiedlichen Anforderungen stellen: Auf der einen Seite gibt es überall kabellose Sensornetzwerke, denen nur eine geringe Menge an Versorgungsleistung im MikrowattBereich zur Verfügung steht. Daher müssen die Chips in diesem Bereich energieautark und möglichst kostengünstig entwickelt werden. Aufgrund der zu erwartenden hohen Stückzahlen (Milliarden von unterschiedlichsten Sensoren für verschiedene Anwendungen) sind eine drahtgebundene Energieversorgung oder der Einsatz von Batterien in vielen Fällen praktisch unmöglich. Somit wird es für die Sensoren immer wichtiger, ihre Energieversorgung aus der Umgebung zu gewinnen (Stichwort Energy Harvesting).

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“…Andreas Gebhard et al,(2019) proposed an algorithm using nonlinear type Recursive Least Square based Adaptive filter and its robust version cancelled the interference of the intermodulation distortion using second order. Here leakage of transmitter signal suppressed using stopband of frequency selective duplex [8]. H. Khatri et al,(2010) and A.…”

Section: Introductionmentioning

confidence: 99%

Investigation and Suppression of RF Leakage Power in Front End Wireless Devices

A¹,

Bhuvaneswari²

2021

Advances in Parallel Computing

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In this modern Communication Wireless System, Frequency Division Duplex (FDD) is mostly used. Duplex is a device to separate Transmitter and Receiver signals. Transmitter or Power leakage causes from limited isolation performance of the duplexer. Various Techniques of Modulation using Orthogonal Frequency Division Multiplexing (OFDM) provided better solution to cancel this leakage. The OFDM provides high spectral efficiency, lower multi-path distortion and to eliminate inter symbol interference (ISI). Fast Fourier Transform implemented modulation and demodulation functions more efficiently. Using simulation result of the various parameters are analysed. In addition, Comparison of the table between Bit rate error value, Signal strength throughput, Power consumption and Mean square error values obtained in the OFDM systems.

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Digital Compensation for Transmitter Leakage in Non-Contiguous Carrier Aggregation Applications With FPGA Implementation

Cited by 17 publications

References 22 publications

Low-Complexity Subband Digital Predistortion for Spurious Emission Suppression in Noncontiguous Spectrum Access

Low-Complexity Subband Digital Predistortion for Spurious Emission Suppression in Noncontiguous Spectrum Access

From microwatt to gigabit: challenges of modern radio design

Investigation and Suppression of RF Leakage Power in Front End Wireless Devices

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