Reconfigurable digital predistortion system and method for millimeter wave broadband power amplifier
A digital pre-distortion, power amplifier technology, applied in power amplifiers, improved amplifiers to reduce nonlinear distortion, amplifiers, etc., can solve the problem of wide analog bandwidth of the transmitter and feedback loop, high baseband data processing rate, insufficient efficiency and flexibility and other issues, to achieve the effect of reducing processing bandwidth, good linearization effect, and reducing pressure
Active Publication Date: 2021-02-09
SOUTHEAST UNIV
View PDF11 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] (1) For existing digital signal processing chips, the baseband data processing rate required by traditional digital predistortion technology is too high;
[0004] (2) The analog bandwidth of the transmitter and feedback loop is too wide to be realized;
[0005] (3) In the face of different carrier modes, the traditional technology applies a unified digital pre-distortion model, which is not efficient and flexible enough
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0033] The technical solution of the present invention will be further introduced below in combination with specific implementation methods and accompanying drawings.
[0034] This specific embodiment discloses a reconfigurable digital predistortion system of a millimeter wave broadband power amplifier, such as Figure 5 As shown, it includes digital predistortion model, power amplifier, analog band-limit filter and model coefficient extraction module. The original baseband input signal generates digital predistortion model output signal through digital predistortion model, and digital predistortion model output signal is respectively sent to power Amplifier and model coefficient extraction module, a small part of the signal obtained after the output signal of the power amplifier passes through the analog band-limiting filter is also sent back to the model coefficient extraction module, and the model coefficient extraction module extracts the digital predistortion model coeffic...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a reconfigurable digital predistortion system of a millimeter-wave broadband power amplifier, including a digital predistortion model, a power amplifier, an analog band-limit filter and a model coefficient extraction module, and the original baseband input signal is generated through the digital predistortion model The output signal of the digital predistortion model, the output signal of the digital predistortion model is sent to the power amplifier and the model coefficient extraction module respectively, and a small part of the signal obtained after the output signal of the power amplifier passes through the analog band-limited filter is also sent back to the model coefficient The extraction module, the model coefficient extraction module extracts the digital pre-distortion model coefficients and sends them to the digital pre-distortion model. The invention also discloses a predistortion method using the system. The invention can flexibly select sub-carriers according to requirements, save frequency spectrum resources; reduce the processing bandwidth required by traditional digital pre-distortion technology; and reduce the pressure of existing digital signal processing chips on high-rate data.
Description
technical field [0001] The invention relates to the technical field of digital linearization of power amplifiers, in particular to a reconfigurable digital predistortion system and method of millimeter wave broadband power amplifiers. Background technique [0002] The rapid development of wireless communication technology and the upcoming fifth generation mobile communication (5G) era have put forward new requirements for power amplifiers. The large-bandwidth signal to be adopted in 5G wireless communication technology can provide a data transmission rate of Gbps order, which can meet the needs of many high-speed data transmissions, such as 8K broadcast TV. Like existing 3G and 4G technologies, millimeter wave power amplifiers used in 5G systems also face the problem of power efficiency. In order to solve this problem, the power amplifier needs to work in the saturation region, but in this way, nonlinearity will be introduced. Digital predistortion technology has become a ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & AuthorityPatents(China)
IPC IPC(8): H03F1/02H03F1/32H03F1/48H03F3/195H03F3/213H03F3/24
CPCH03F1/02H03F1/3241H03F1/486H03F3/195H03F3/213H03F3/24H03F2200/451
Inventor余超杨吶
OwnerSOUTHEAST UNIV