Low Power Pre-Distorter Design For 5G Radio Using Machine Learning
(2020) EITM02 20201Department of Electrical and Information Technology
- Abstract
- A Power Amplifier (PA) is an essential electronic component in all microwave and millimeter-wave applications and, more specifically, in any transmitting system where the level of input power signal needs amplification to the desired level.Linearity and high efficiency are of utmost importance in PAs. However, high-efficiency PAs tend to be non-linear, and PAs working in the linear region might have low efficiency. Hence, there is always a trade-off between efficiency and linearity while designing a PA.
For an efficient system design, the efficiency of the PA gets prioritized by the designers, and for linearity, an additional linearization technique can be deployed. Designers have been considering many linearization methods. Among... (More) - A Power Amplifier (PA) is an essential electronic component in all microwave and millimeter-wave applications and, more specifically, in any transmitting system where the level of input power signal needs amplification to the desired level.Linearity and high efficiency are of utmost importance in PAs. However, high-efficiency PAs tend to be non-linear, and PAs working in the linear region might have low efficiency. Hence, there is always a trade-off between efficiency and linearity while designing a PA.
For an efficient system design, the efficiency of the PA gets prioritized by the designers, and for linearity, an additional linearization technique can be deployed. Designers have been considering many linearization methods. Among those, digital predistorter tends to be the most popular one as it can provide a right amalgamation between linearity performance and implementation complexity. However, the computation process used to obtain an inverse PA behavior inside a digital predistorter consumes significant power. In this thesis, the main target is to find a power-efficient way to enhance the current algorithm for the digital pre-distorter (look-up-table based) and evaluate the power results along with Adjacent Channel Power Ratio (ACPR) (Less) - Popular Abstract
- The power amplifier is an electronic device designed to increase the magnitude of a given input signal. The signal with an enhanced magnitude drives the devices like speakers, headphones, and RF transmitters. Power amplifiers are one of the essential elements within the wireless communication area since base stations utilize them to broadcast and transmit wireless signals to the users. Moreover, with increased power levels, higher data transfer rates, and long-range transmission is possible. From a computation perspective, an ideal power amplifier multiplies the input signal with the desired gain. However, the power amplifiers are a non-linear source for a communication system and different from the ideal scenario. The non-linearity is... (More)
- The power amplifier is an electronic device designed to increase the magnitude of a given input signal. The signal with an enhanced magnitude drives the devices like speakers, headphones, and RF transmitters. Power amplifiers are one of the essential elements within the wireless communication area since base stations utilize them to broadcast and transmit wireless signals to the users. Moreover, with increased power levels, higher data transfer rates, and long-range transmission is possible. From a computation perspective, an ideal power amplifier multiplies the input signal with the desired gain. However, the power amplifiers are a non-linear source for a communication system and different from the ideal scenario. The non-linearity is introduced as output power increases and reaches near to its maximum threshold, which can lead to in-band distortion within the system. For this reason, the linearization of power amplifiers is an essential topic and widely researched in the digital communication field.
The most common method for linearizing a power amplifier’s behavior is the digital predistortion. This method is very power efficient as well as cost-saving. Ideally, with the predistortion, the characteristics of a power amplifier are inversed in order to compensate for the non-linearities. The predistorter unit, along with the system’s amplifier inside a digital communication system, corrects any possible gain and phase non-linearities introduced to produce a distortion free signal. The need for a bigger, less efficient, expensive amplifier is avoided by using predistortion to provide the gain stability at the output of the amplifiers. Although the predistortion technique is widely implemented and successful, the current techniques of employing the predistortion are very power-consuming due to their complexity and the amount of computational power they require. For that reason, new approaches are under the scope.
Earth, our ‘home’ has limited resources, which are continually diminishing. With technological improvements, the goal is to use resources in an efficient way for a sustainable world. Without any doubt, increasing the efficiency of mobile communication systems is crucial. The base station is the most power-consuming block in mobile communications, out of which power amplifiers consume a significant portion of the overall power budget. In 2010, Europe’s telecoms used the power equivalent of 21.4 TWh, which is expected to rise to 35.8 TWh by 2020 [1]. Thus, increasing improving the efficiency of power amplifiers is vital for sustainable base stations.
This research assesses the influence of LUT numbers on power consumption and ACPR rating. The main goal is to reduce the power consumption of current DPD design by proposing a power-efficient algorithm to decrease the number of hardware resources that meets the required neighbouring channel leakage rating for 3GPP specification. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/9029033
- author
- Diddigi Kulkarni, Sumeeth LU and Wang, Di LU
- supervisor
-
- Liang Liu LU
- Sidra Muneer LU
- Asad Jafri
- organization
- course
- EITM02 20201
- year
- 2020
- type
- H2 - Master's Degree (Two Years)
- subject
- report number
- LU/LTH-EIT 2020-788
- language
- English
- id
- 9029033
- date added to LUP
- 2020-09-16 10:55:15
- date last changed
- 2020-09-16 10:55:15
@misc{9029033,
abstract = {{A Power Amplifier (PA) is an essential electronic component in all microwave and millimeter-wave applications and, more specifically, in any transmitting system where the level of input power signal needs amplification to the desired level.Linearity and high efficiency are of utmost importance in PAs. However, high-efficiency PAs tend to be non-linear, and PAs working in the linear region might have low efficiency. Hence, there is always a trade-off between efficiency and linearity while designing a PA.
For an efficient system design, the efficiency of the PA gets prioritized by the designers, and for linearity, an additional linearization technique can be deployed. Designers have been considering many linearization methods. Among those, digital predistorter tends to be the most popular one as it can provide a right amalgamation between linearity performance and implementation complexity. However, the computation process used to obtain an inverse PA behavior inside a digital predistorter consumes significant power. In this thesis, the main target is to find a power-efficient way to enhance the current algorithm for the digital pre-distorter (look-up-table based) and evaluate the power results along with Adjacent Channel Power Ratio (ACPR)}},
author = {{Diddigi Kulkarni, Sumeeth and Wang, Di}},
language = {{eng}},
note = {{Student Paper}},
title = {{Low Power Pre-Distorter Design For 5G Radio Using Machine Learning}},
year = {{2020}},
}