Power allocation for massive MIMO: impact of power amplifier efficiency

Ye, Guo; Tang, Junlin; Wu, Gang; Li, Shaoqian

doi:10.1007/s11432-015-5513-5

Cited by 16 publications

(2 citation statements)

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“…Since the peak-to-average power ratio of the OFDM signal, when B = 10 MHz with 1024 subcarriers, is around 11.7 dB with complementary cumulative distribution function, CCDF = 10 −3 , we can say that around 1.7 dB is successfully reduced using any kind of scheme such as clipping. There are several studies related to the PA of LSAS [38,39]. In [38], authors proposed a power amplifier configuration for LSAS transmitter.…”

Section: Power Amplifiermentioning

confidence: 99%

“…Their results confirm the validity of the configuration employing the signal cancellation loop of 3.5-GHz 140-W class feed-forward power amplifier. In [39], authors proposed a more general EE model of LSAS considering PA efficiency as a variable, and investigated a power allocation algorithm based on zero-forcing precoding so that one can guarantee the TP and EE at the same time.…”

Section: Power Amplifiermentioning

confidence: 99%

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Energy Efficiency Gain of Cellular Base Stations with Large-Scale Antenna Systems for Green Information and Communication Technology

Lee

2017

Sustainability

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Due to the ever-increasing data demand of end users, the number of information and communication technology (ICT)-related devices and equipment continues to increase. This induces large amounts of heat emissions, which can cause serious environmental pollution. In recent times, signal transmission systems such as cellular base stations (BSs) have been constructed everywhere and these emit a large carbon footprint. Large-scale antenna systems (LSASs) that use a large amount of transmission antennas to serve a limited number of users can increase energy efficiency (EE) of BSs based on the beamforming effect, and thus can be a promising candidate to reduce the carbon footprint of the ICT field. In this paper, we discuss the necessary schemes to realize LSASs and show the expected EE gain of the LSAS with enough practicality. There are many obstacles to realize the high EE LSAS, and even though several studies have shown separate schemes to increase the EE and/or throughput (TP) of LSASs, few have shown combinations of schemes, and presented how much EE gain can be achieved by the schemes in the overall system. Based on the analysis in this paper, we believe more detailed work for the realization of high energy efficient BSs with LSASs is possible because this paper shows the necessary schemes and the maximum achievable energy efficiency gain as a reference. Extensive analysis and simulation results show that with proper implementation of the power amplifier/RF module and a robust channel estimation scheme, LSASs with 600 transmitter (TX) antennas can achieve 99.4 times more EE gain compared to the current systems, thereby resulting in significant reduction of carbon footprints.

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Section: Power Amplifiermentioning

confidence: 99%

Section: Power Amplifiermentioning

confidence: 99%