Design of an RF Six-Mode CMOS Power Amplifier for Efficiency Improvement at Power Backoff

Tarui, B.; Santas, F.; Santos, Edson Leonardo dos; Leite, Bernardo; Mariano, André

doi:10.1109/sbcci.2018.8533222

Cited by 2 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such design provides a range of operating modes between low-gain and highgain modes. The work in [21] has been recently extended in order to consider both stages being reconfigurable [12]. Such combination is controlled by six digital switches, three at each stage, yielding 64 possible operating modes with different gains, power levels, linearity and power consumption.…”

Section: A Related Workmentioning

confidence: 99%

“…Such combination is controlled by six digital switches, three at each stage, yielding 64 possible operating modes with different gains, power levels, linearity and power consumption. The PA in [12] admits the power gain to vary from 18 dB to 31 dB, the output 1 dB compression point varies from 7.5 dBm to 16.9 dBm, whereas the power consumption can be as low as 153 mW, up to 394 mW in high-power modes. This PA provides significant reconfigurability for the 2.4 GHz band.…”

Section: A Related Workmentioning

confidence: 99%

“…Typically, the PA has the stronger impact on the total power consumption of the transmitter RF chain, and it depends on the communication distance. The adopted PA follows [12], which is a two-stage class AB PA employing a cascode topology using Globalfoundries 130 nm CMOS technology, operating in the unlicensed 2.4 GHz band. Fig.…”

Section: A Reconfigurable Pamentioning

confidence: 99%

“…where I n is an identity matrix, n = min{n t , n r }, † denotes the conjugate transpose operation, and λ l are the eigenvalues of HH † . In addition, the transformation from (12) to (13) follows the SVD operation [32]. Using Jensen's inequality, the mutual information of SVD can be upper bounded by [32] 1 n n l=1…”

Section: Singular Value Decomposition (Svd) Beamformingmentioning

confidence: 99%

“…We consider the circuits of the power amplifier (PA) and the low noise amplifier (LNA), exploiting different operating modes that impact the power consumption, while the other circuits of the RF chain have only one operating mode. We employ state-of-the-art circuits, using real data from the reconfigurable PA proposed by [12] and the reconfigurable LNA in [13]. Furthermore, for better positioning the contribution of this paper, we compare the results with those of two state-of-the-art non-reconfigurable circuits designed for high performance, the PA proposed by [14] and the LNA in [15].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Energy Efficiency in Multiple Antenna Machine-Type Communications With Reconfigurable RF Transceivers

et al. 2019

View full text Add to dashboard Cite

In machine-type communication (MTC) networks, each node is equipped with a set of radiofrequency (RF) transceivers, antennas and power source. Besides, wireless nodes are typically batterypowered, whose recharging or replacement is often not viable or even impossible. Therefore, in such systems where energy is at a premium, minimizing power consumption improves energy efficiency and increases battery lifetime. In this paper, a novel energy-saving approach includes in the communication system model the use of reconfigurable RF transceivers. More specifically, the components involved in our power minimization framework are the power amplifier (PA) at the transmitter and the low noise amplifier (LNA) at the receiver, which are the blocks responsible for RF amplification and are on top of power consuming blocks in RF transceivers. Our goal is to show that RF circuits based on multimode operation can significantly improve the energy efficiency. We perform a joint selection of the best operating modes for PA and LNA circuits in different communication scenarios. Results show that by combining PA and LNA operating modes, an improvement of more than 75% in energy efficiency is obtained for multiple antenna communications, when compared to the state-of-the-art literature of non-reconfigurable amplifiers. Besides, we show that adapting spectral efficiency contributes towards improving energy efficiency. In this case, we consider different spectral efficiency values, including the effect that the PA operates at different backed-off power levels. In addition, when comparing single-input single-output (SISO) and multiple-input multiple-output (MIMO) transmission schemes, antenna selection (AS) outperforms the others schemes in terms of energy efficiency for short and moderate distances, but singular value decomposition (SVD) allows for longer communication distances. INDEX TERMS Energy efficiency, reconfigurable RF transceivers, machine-type communications, multiple antennas.

show abstract

Section: A Related Workmentioning

confidence: 99%

Section: A Related Workmentioning

confidence: 99%

Section: A Reconfigurable Pamentioning

confidence: 99%

Section: Singular Value Decomposition (Svd) Beamformingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Energy Efficiency in Multiple Antenna Machine-Type Communications With Reconfigurable RF Transceivers

et al. 2019

View full text Add to dashboard Cite

show abstract

Energy Analysis in Cooperative Machine-Type Communications with Reconfigurable RF Transceivers

Santos¹,

Mariano²,

Brante³

et al. 2020

Anais De XXXVIII Simpósio Brasileiro De Telecomunicações E Processamento De Sinais

View full text Add to dashboard Cite

In this paper, we consider reconfigurable RF transceivers in cooperative communications towards improving the energy efficiency. More specifically, we combine different operating modes of the power amplifier (PA) and the low noise amplifier (LNA). Our results show that the proper optimization of these modes combined with cooperative relaying may be considerably more energy efficient than non-cooperative schemes with multiple antennas over moderate and long distances. Results also show that most reconfigurability depends on the relay node, since it only acts when necessary.

show abstract

Design of an RF Six-Mode CMOS Power Amplifier for Efficiency Improvement at Power Backoff

Cited by 2 publications

References 4 publications

Energy Efficiency in Multiple Antenna Machine-Type Communications With Reconfigurable RF Transceivers

Energy Efficiency in Multiple Antenna Machine-Type Communications With Reconfigurable RF Transceivers

Energy Analysis in Cooperative Machine-Type Communications with Reconfigurable RF Transceivers

Contact Info

Product

Resources

About